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1: ANK AudioKits Forum, RE: L3 phono stage ecc 82 (0.00)
Posted by richardcooper2k on 2009-04-28, 15:39:42 (79.66.14.207)
i have also thought about using a different valve for the output stage my interest was in one that would drive an output transformer better because i wondered what my system would sound like with an .......
2: ANK AudioKits Forum, RE: wattage of 1k Resistor from Tag C to pin 3 of 300B (0.00)
Posted by richardcooper2k on 2009-03-18, 11:31:08 (79.66.93.109)
some points : -caps are much more sensitive to heat than resistors -the heat from the valve will mainly go upwards. components under the base won't get much heat (and resistors are less sensitive) -it .......
3: ANK AudioKits Forum, RE: wattage of 1k Resistor from Tag C to pin 3 of 300B (0.00)
Posted by richardcooper2k on 2009-03-17, 14:52:36 (79.66.74.157)
i prefer to keep a small distance between resistors and capacitors in case the resistors get hot .......
4: ANK AudioKits Forum, RE: Kit1 Phono Stage is blowing fuse (0.00)
Posted by richardcooper2k on 2009-02-25, 11:33:50 (79.66.76.234)
i may be wrong but i thought it should be a slow blow fuse ? .......
5: ANK AudioKits Forum, RE: hum with balanced connection (0.00)
Posted by richardcooper2k on 2009-02-16, 10:02:03 (79.74.41.233)
hi horny i just remembered having a similar problem to the one you describe in a different situation it happened when i changed my tonearm. when i put the new tonearm on and turned the volume up to no .......
6: ANK AudioKits Forum, RE: hum with balanced connection (0.00)
Posted by richardcooper2k on 2009-02-15, 15:36:33 (79.74.8.22)
those connections look right to me but like i said i've not tried balanced connections myself is the ground on your phono sockets connected to any other ground ? this could create problems. amps with .......
7: ANK AudioKits Forum, RE: hum with balanced connection (0.00)
Posted by richardcooper2k on 2009-02-15, 14:02:32 (79.74.8.22)
the reason it is louder is because the yellow wire is a centre tap on the secondary winding so you get half the signal between this and either of the other wires. compared to accross the orange and bl .......
8: ANK AudioKits Forum, RE: Has anyone found a modification in Kit1/2 that would allow a preamp to be used? (0.00)
Posted by richardcooper2k on 2009-02-15, 13:33:06 (79.74.8.22)
i think there should be some old posts on the forum about this but some people didn't like the sound with the first stage bypassed i think most people put up with the extra gain - i did before i built .......
9: ANK AudioKits Forum, RE: L3 Phono board upgrades (0.00)
Posted by richardcooper2k on 2009-01-22, 10:47:50 (79.66.111.109)
you are right the value you need is not listed at parts connexion....or hifi collective or diyhfisupply. it is listed on the AN UK web site however and there are certainly two on my board you might ha .......
10: ANK AudioKits Forum, RE: L3 Phono board upgrades (0.00)
Posted by richardcooper2k on 2009-01-20, 09:53:06 (79.74.78.186)
they are part of the riaa network so will affect the frequency responce of the amp you can get audio note copper pios in this value which would not stop you using mundorf for the other values if you w .......
11: ANK AudioKits Forum, RE: 300B Interstage Mono Block Kit tube recommendations please (0.00)
Posted by richardcooper2k on 2008-12-15, 15:29:08 (79.74.118.87)
hi gary first off i don't think the monos are as warm sounding as the kit 1. i would describe the monos as cleaner sounding and more acurate. i prefer them but others may not with all music the thing .......
12: ANK AudioKits Forum, RE: Upgrade DAC 2.1 Level B to Level C (0.00)
Posted by richardcooper2k on 2008-12-05, 05:06:15 (79.71.51.190)
there's plenty of other options for 5687 tube rolling to be tried have you tried doing a search on this forum to see other peoples preferences for 5687 types with their audio note kits ? and of course .......
13: ANK AudioKits Forum, RE: Interstage Transformer for Monoblock Kit (0.00)
Posted by richardcooper2k on 2008-12-04, 11:24:16 (79.71.67.177)
thats what it says on mine although it's always worth mentioning what you're using them for when you order i went for super HiB as its not much more than improved HiB .......
14: ANK AudioKits Forum, RE: 22uF cap in M2 PSU (0.00)
Posted by richardcooper2k on 2008-12-01, 16:41:25 (79.71.82.134)
what are you using over at the back there, the grey and black blocks are they chokes/caps ? what are they used for ? .......
15: ANK AudioKits Forum, RE: Discolored AN RCAs (0.00)
Posted by richardcooper2k on 2008-11-25, 11:40:43 (79.71.20.178)
maybe you need to get your amp exorcised ! mine's not done that. do you live near the sea or a chemical plant, humid climate, etc ? .......
16: ANK AudioKits Forum, Re: Stepped attenuators - anyone tried the Audio Note? (0.00)
Posted by richardcooper2k on 2008-11-03, 16:23:55 (79.71.75.93)
well i finally got round to replacing the metal film resistors i had used in the shunt pot mod with AN tants was surprised to notice a big difference for changing one resistor. much less nasty top and .......
17: ANK AudioKits Forum, RE: New Choke De-coupling Circuitry on L3 line (0.00)
Posted by richardcooper2k on 2008-11-03, 16:06:30 (79.71.75.93)
i've fitted a cheap 25H choke and a blackgate 22uF VK cap on each channel quite impressed with the improvement. similar to what exorcist noticed clearer sound with a darker background. i can hear more .......
18: ANK AudioKits Forum, RE: New Choke De-coupling Circuitry on L3 line (0.00)
Posted by richardcooper2k on 2008-11-03, 15:56:46 (79.71.75.93)
i think you'd change the operating point of the other half of the 5687 (ht fed through the primary of the output transformer) if you dropped the ht you could try measuring the dc resistance of the cho .......
19: ANK AudioKits Forum, RE: L3 power supply upgrade (0.00)
Posted by richardcooper2k on 2008-11-01, 07:52:40 (79.71.110.216)
usually the exact size of power supply caps like these is not critical the tolerances on electrolytics often vary by 30% or so anyhow .......
20: ANK AudioKits Forum, RE: Kit1 PSU troubles - please comment (0.00)
Posted by richardcooper2k on 2008-11-01, 07:26:14 (79.71.110.216)
have you checked the voltages are correct on both channels ? if one of the caps is bad it could damage other components before you hear any change. the voltages will be different though and this is wh .......
21: ANK AudioKits Forum, RE: Mono Interstage Transformers (0.00)
Posted by richardcooper2k on 2008-10-21, 08:58:32 (79.71.112.49)
enjoy ! .......
22: ANK AudioKits Forum, RE: Schottky Diodes M3 (0.00)
Posted by richardcooper2k on 2008-10-19, 14:46:12 (79.71.46.31)
yes i did install schottkys in my mono filaments and posted a photo here http://www.audioasylum.com/forums/audionotekits/messages/4850.html the results were the same as adding them to the L3, a layer .......
23: ANK AudioKits Forum, RE: Schottky Diodes M3 (0.00)
Posted by richardcooper2k on 2008-10-19, 06:17:22 (217.44.70.29)
reposted in the right place i hope ! i see you have two main transformers. why is that ? how are you using them ? i've got an copper coupling caps at the moment but have ordered some scr teflons to tr .......
24: ANK AudioKits Forum, RE: Best Power Supply Caps for 300B PSE Mono Block´s ? (0.00)
Posted by richardcooper2k on 2008-10-19, 05:52:39 (217.44.70.29)
i havn't done any direct comparisons i would expect them all to be better than jj caps (and so they should be for the price). the blackgates certainly are (i wasn't that keen on the sound of my mono's .......
25: ANK AudioKits Forum, RE: Best Power Supply Caps for 300B PSE Mono Block´s ? (0.00)
Posted by richardcooper2k on 2008-10-19, 04:58:02 (217.44.70.29)
remeber you need 3 for each monoblock it may be fine but i don't think there would be any advantage sometimes using too large a cap can cause problems with instability or high currents being caused wh .......
26: ANK AudioKits Forum, RE: Best Power Supply Caps for 300B PSE Mono Block´s ? (0.00)
Posted by richardcooper2k on 2008-10-19, 04:22:11 (217.44.70.29)
i have two 100+100uF wkz 500v. one makes the two 100uF caps and the other has its two sections paralelled to make the 200uF cap and yes to use the mundorf tubecaps you'd need to make a new plate to mo .......
27: ANK AudioKits Forum, RE: Schottky Diodes M3 (0.00)
Posted by richardcooper2k on 2008-10-19, 03:58:19 (217.44.70.29)
sorry, my fault i was refering to exorcists photo of his L3 line stage and posted it in the wrong place .......
28: ANK AudioKits Forum, RE: Best Power Supply Caps for 300B PSE Mono Block´s ? (0.00)
Posted by richardcooper2k on 2008-10-19, 03:34:52 (217.44.70.29)
the 220uF and two 100uF are the ones which usually get upgraded as they are the most critical in the ht power supply the 220uF cap can be replaced by a 200-220UF cap or by two 100uF caps in parallel. .......
29: ANK AudioKits Forum, RE: Best Power Supply Caps for 300B PSE Mono Block´s ? (0.00)
Posted by richardcooper2k on 2008-10-18, 10:06:20 (79.71.32.54)
i think most people considored the 2 off blackgate wkz 100+100uF as the gold standard but these are getting hard to get now other good quality electrolytics are the mundorf m-lytics and the jensen one .......
30: ANK AudioKits Forum, RE: Schottky Diodes M3 (0.00)
Posted by richardcooper2k on 2008-10-18, 09:33:33 (79.71.32.54)
i see you have two main transformers. why is that ? i've got an copper coupling caps at the moment but have ordered some scr teflons to try. has anyone else tried them ? .......
31: ANK AudioKits Forum, RE: What causes Tube rush noise? (0.00)
Posted by richardcooper2k on 2008-10-18, 02:31:36 (79.71.10.40)
i got a strange noise like this on one channel a few days ago. i lightly knocked the bottom of my pre amp with my fingers and it stopped tube, cap, solder joint, i'm not sure. if it happens again i'll .......
32: ANK AudioKits Forum, RE: Schottky Diodes M3 (0.00)
Posted by richardcooper2k on 2008-10-17, 05:05:29 (79.71.25.231)
you replace the bridge rectifier (KBU6J) with schottkys which comes before the regulator (LM7812 i think) the schottkys do have a lower voltage drop across them which give you a higher voltage output .......
33: ANK AudioKits Forum, RE: Very nice (0.00)
Posted by richardcooper2k on 2008-10-16, 05:14:48 (79.71.43.37)
when i was building mine i think brian asked andy grove and he said i'd need 2 m2 power supplies. not sure wether it was ht or filament supply that was limiting. be interesting to know the current cap .......
34: ANK AudioKits Forum, RE: kit burn in time? (0.00)
Posted by richardcooper2k on 2008-10-13, 16:40:49 (79.71.53.174)
i also used fk caps but not sure how long break in took to me mine sounds very clear and without boominess, but i guess it depends what you are comparing it to (what was your old one ?) it may be that .......
35: ANK AudioKits Forum, RE: Kit1 PSU troubles - please comment (0.00)
Posted by richardcooper2k on 2008-10-13, 16:29:25 (79.71.53.174)
yes a cap rated at 1200v will withstand a higher voltage but if there was a weakness in it from manufacturing or other damage it could fail i suspect the arcing in the rectifier valve is being caused .......
36: ANK AudioKits Forum, RE: Kit1 PSU troubles - please comment (0.00)
Posted by richardcooper2k on 2008-10-13, 10:37:47 (79.71.37.165)
probably either coupling cap to 300b or more likly the cathode bypass cap on the same glowing 300b. i've had cathode bypass go twice before and it took out the 300b and the rectifier. i now use cathod .......
37: ANK AudioKits Forum, RE: kit burn in time? (0.00)
Posted by richardcooper2k on 2008-10-12, 02:44:08 (79.71.111.210)
what are your ears telling you ? .......
38: ANK AudioKits Forum, RE: New Choke De-coupling Circuitry on L3 line (0.00)
Posted by richardcooper2k on 2008-10-10, 14:11:22 (79.71.47.189)
which side of the new choke does the 0.1uf 600V cap from ht to earth on the line board go ? on the valve side rather than the power supply side ? or is it missed out in the new circuit ? .......
39: ANK AudioKits Forum, RE: New Choke De-coupling Circuitry on L3 line (0.00)
Posted by richardcooper2k on 2008-10-08, 15:20:24 (79.71.94.138)
wouldn't it be better to use TC-160-15W ? with more inductance you could use a smaller cap and go for a non electrolytic one, and still get the same amount of filtering, unless you're thinking of (or .......
40: ANK AudioKits Forum, RE: New Choke De-coupling Circuitry on L3 line (0.00)
Posted by richardcooper2k on 2008-10-08, 01:21:26 (79.71.23.236)
thanks exorcist, though it,s more that dirty great electolytic that bothers me, still if your ears tell you it's better, that's what counts i shall have to give it a go .......
41: ANK AudioKits Forum, RE: my L3 (0.00)
Posted by richardcooper2k on 2008-10-07, 15:28:32 (79.71.95.96)
thankyou, and yes those are cinemag mc step ups. they are cheap and seem to get rave reveiws fom diyers though i havn't compared them to any others myself. havn't noticed a lot of hum but in this amp .......
42: ANK AudioKits Forum, New Choke De-coupling Circuitry on L3 line (0.00)
Posted by richardcooper2k on 2008-10-07, 04:11:33 (79.71.3.126)
just noticed this on AN kits site has anyone converted from the old circuit ? what difference (if any) did you notice ? did you get the parts from brian ? .......
43: ANK AudioKits Forum, RE: Very nice (0.00)
Posted by richardcooper2k on 2008-10-07, 03:42:40 (79.71.3.126)
hi frank - so are you running line and phono off one m2 power supply - i didn't think they could supply that much current ? are you using audio consult from output transformer to output connection fro .......
44: ANK AudioKits Forum, RE: Mono Interstage Transformers (0.00)
Posted by richardcooper2k on 2008-10-06, 06:39:26 (79.71.61.24)
the thing behind is a common mode choke in the heater supply to the 300b .......
45: ANK AudioKits Forum, my L3 (0.00)
Posted by richardcooper2k on 2008-10-06, 06:28:04 (79.71.61.24)
while i was taking pictures of schottkeys i took one of my L3 based pre amp kit as well i designed for short signal cabling and a one box solution as usual my camera has let me down (a bad workman .......
46: ANK AudioKits Forum, RE: Mono Interstage Transformers (0.00)
Posted by richardcooper2k on 2008-10-06, 06:17:43 (79.71.61.24)
this may help. bad quality again sorry .......
47: ANK AudioKits Forum, RE: Mono Interstage Transformers (0.00)
Posted by richardcooper2k on 2008-10-06, 06:11:12 (79.71.61.24)
sorry about the terrible quality .......
48: ANK AudioKits Forum, RE: Mono Interstage Transformers (0.00)
Posted by richardcooper2k on 2008-10-05, 05:54:17 (79.71.91.183)
i used 31dq10 as well. i chose these because they were cheap and they were can cope with the voltage and current (probably over specified but on the safe side. you need 4 of these to replace each big .......
49: ANK AudioKits Forum, RE: Mono Interstage Transformers (0.00)
Posted by richardcooper2k on 2008-10-03, 15:58:42 (79.71.94.247)
thats interesting. my origionals look like the ones on the AN kits web page and i thought they were ie cores. maybe i'm wrong .......
50: ANK AudioKits Forum, RE: Mono Interstage Transformers (0.00)
Posted by richardcooper2k on 2008-10-03, 05:47:30 (79.71.98.41)
thanks for the tube rolling comparisons .......
51: ANK AudioKits Forum, RE: Mono Interstage Transformers (0.00)
Posted by richardcooper2k on 2008-10-03, 05:46:02 (79.71.98.41)
hi doug - were your origionals ie or c core ? .......
52: ANK AudioKits Forum, RE: Mono Interstage Transformers (0.00)
Posted by richardcooper2k on 2008-10-03, 05:40:56 (79.71.98.41)
super hib is between hib and ultra hib. it is closer in price to hib. performance wise i havn't done a comparison. i seem to remember at the time peter telling me in some ways he liked cu-silver super .......
53: ANK AudioKits Forum, An E impedance graph (0.00)
Posted by richardcooper2k on 2008-10-02, 04:18:19 (79.71.35.41)
can anyone post a link or a copy of the impedance versus frequency for the AN E speakers i guess it may be different for different configurations so that information might be useful too .......
54: ANK AudioKits Forum, RE: Mono Interstage Transformers (0.00)
Posted by richardcooper2k on 2008-10-02, 04:11:47 (79.71.35.41)
similar to what you get with c core output trannies generaly more refined sound. clearer and richer. no dynamic loss i went for super hi b as not much more in price possibly as much to do with improve .......
55: ANK AudioKits Forum, RE: Poll: which transport with Audio Note Kits DAC 2.1? (0.00)
Posted by richardcooper2k on 2008-09-23, 11:47:19 (82.38.152.230)
a lot of people seem to have decided that assuming the information format (redbook cd, wav, etc) is the same they prefer the sound off hardisk to from a cd drive the expanation given is that you get l .......
56: ANK AudioKits Forum, RE: Has anyone tried to convert a Kit 1 to AC filaments? (0.00)
Posted by richardcooper2k on 2008-07-20, 10:28:10 (82.38.152.230)
let us know what you find do other people run their audio note amp dht filaments in a non standard fashion ? .......
57: ANK AudioKits Forum, RE: Has anyone tried to convert a Kit 1 to AC filaments? (0.00)
Posted by richardcooper2k on 2008-07-14, 13:15:35 (79.71.111.220)
that is interesting to hear as i had only heard positive comments from people who've tried them. maybe its a case of the same medicine doesn't work for everyone. or perhaps in different applications .......
58: ANK AudioKits Forum, RE: Has anyone tried to convert a Kit 1 to AC filaments? (0.00)
Posted by richardcooper2k on 2008-07-14, 11:26:37 (79.71.111.220)
i havn't tried it. you may get some hum which would be worse, the more sensitive your speakers are the other ways to go are to use tentlabs filament supplies. i beleive diyhifi supply do one as well n .......
59: ANK AudioKits Forum, RE: 10 Upgrades for M3 Preamp (0.00)
Posted by richardcooper2k on 2008-05-19, 02:39:21 (79.67.50.227)
what wood is that you used. looks lovely .......
60: ANK AudioKits Forum, RE: Mundorf M-tube caps- follow up (0.00)
Posted by richardcooper2k on 2008-05-10, 08:44:06 (79.67.47.36)
thankyou for confirming my suspicion .......
61: ANK AudioKits Forum, RE: Mundorf M-tube caps- follow up (0.00)
Posted by richardcooper2k on 2008-05-10, 08:40:44 (79.67.47.36)
look forward to seeing your list the caps for the pin 7 mod have arrived but i havn't tried them yet .......
62: ANK AudioKits Forum, RE: L3 XLR and RCA usage (0.00)
Posted by richardcooper2k on 2008-05-10, 08:32:47 (79.67.47.36)
in the m3 manual i have it tells you how to wire it either for xlr or phonos but not both at the same time. the new L3 manual may be different but i realise now you are correct as the yellow wire is t .......
63: ANK AudioKits Forum, RE: Mundorf M-tube caps- follow up (0.00)
Posted by richardcooper2k on 2008-05-07, 13:11:05 (82.38.152.230)
i did the same but used 150uF mundorfs. this value is too large i think, for the one before the choke at least, as my rectifier valve has started arcing sometimes when i switch the amp on. so i need t .......
64: ANK AudioKits Forum, RE: L3 XLR and RCA usage (0.00)
Posted by richardcooper2k on 2008-05-07, 12:59:51 (79.67.47.36)
i wondered about this as well thinking out loud if you only have equipment conected to one or the other i think the only effect would be to have longer lengths of wire to pick up noise if you had equi .......
65: ANK AudioKits Forum, RE: 4 ohm tap is livelier (0.00)
Posted by richardcooper2k on 2008-04-27, 13:40:31 (194.164.88.22)
after further thought i'm not sure which is correct i measured the dc resistance of the bass driver which is not the same as impedance impedance is the 'resistance' at a certain frequency, and with a .......
66: ANK AudioKits Forum, RE: 100k attenuator option (0.00)
Posted by richardcooper2k on 2008-04-23, 15:21:35 (79.67.51.193)
i still rate the shunt mod as then you have no switches at all in the signal path, you only have one resistor to burn in(if you beleive in this), you only need to buy one quality resistor. works excel .......
67: ANK AudioKits Forum, RE: thanks Richard (0.00)
Posted by richardcooper2k on 2008-04-22, 23:45:58 (82.38.152.230)
been using 4 as long as i can remember. can't remember what 8 sounded like .......
68: ANK AudioKits Forum, RE: which post 4 or 8 ohm (0.00)
Posted by richardcooper2k on 2008-04-22, 04:23:03 (79.75.31.69)
my an e kit speaker bass drivers measure 4 ohm dc resistance 4 ohm tap uses less windings on the output transformer so would presumably give less load on the amp ? .......
69: ANK AudioKits Forum, RE: AN amp for Klipsch RF-5s ? (0.00)
Posted by richardcooper2k on 2008-04-22, 04:13:40 (79.75.31.69)
you won't get a push pull sound with a single ended amp it comes down to personal preference. mine is single ended. pp tends to have more authority and dynamics but with single ended you get more of o .......
70: ANK AudioKits Forum, RE: input impedence for 300B kit (0.00)
Posted by richardcooper2k on 2008-04-22, 04:02:12 (79.75.31.69)
looking at the schematic, there is a 470k resistor to earth from the input .......
71: ANK AudioKits Forum, RE: Calling Kit 1 PQ Signature users? (0.00)
Posted by richardcooper2k on 2008-04-21, 15:00:14 (79.67.107.250)
you can play with the power supply if need be. more importantly does it have the c core output tranformers. you will get a deeper and tighter bass response with these. presumably if you're using other .......
72: ANK AudioKits Forum, RE: Lastest Greatest M2 tweaks? (0.00)
Posted by richardcooper2k on 2008-04-21, 14:38:43 (82.38.152.230)
something suggested to me at the weekend (i havn't tried it yet). put a cap from pin 7 on ecl82 to earth. this will help stop any noise from the supply before the reg being sent into the grid, making .......
73: ANK AudioKits Forum, RE: Valve Life - To Power On or Off ? (0.00)
Posted by richardcooper2k on 2008-03-31, 15:01:05 (79.75.2.37)
i switch mine off for economy, environment, valve life and fire safety .......
74: ANK AudioKits Forum, RE: Inexpensive transport for dac 2.1.. (0.00)
Posted by richardcooper2k on 2008-03-05, 06:12:14 (79.75.66.195)
this echos what i've been reading on other forums. that often new dvd players are as good as or even outperform not so old hi end cd players. others say information read from hard drives or even bette .......
75: ANK AudioKits Forum, RE: L3 vs. M3 (0.00)
Posted by richardcooper2k on 2008-03-01, 11:16:11 (79.67.31.249)
the L3 kit is the same as the old M3 kit it was renamed because it is not equivalent to the M3 finished products the kits have similar signal circuits to the finished M3 product but the kit power supp .......
76: ANK AudioKits Forum, RE: M3 Preamp Upgrade (0.00)
Posted by richardcooper2k on 2008-02-16, 06:29:20 (79.67.121.126)
see this thread for direct coupling discussion http://db.audioasylum.com/cgi/m.mpl?forum=audionotekits&n=3277&highlight=resistor+coupled+m3+line what circiut do you like/use GT ? .......
77: ANK AudioKits Forum, RE: MonoBlock Plate Voltage & Sound Quality (0.00)
Posted by richardcooper2k on 2008-02-05, 06:05:40 (194.164.88.22)
let us know if you notice a difference .......
78: ANK AudioKits Forum, RE: Mains Tx to go choke-led (0.00)
Posted by richardcooper2k on 2008-02-05, 05:38:01 (194.164.88.22)
i beleive you can tune the voltage output by using different size small caps before the first choke and still get most of the benefit of a choke input choke input is much more demanding on the first c .......
79: ANK AudioKits Forum, RE: MonoBlock Plate Voltage & Sound Quality (0.00)
Posted by richardcooper2k on 2008-02-05, 01:05:09 (79.75.84.228)
mine was running at 495V and i used a 300 ohm resistor i used wkz to replace the two caps that stick up out of the chassis. there was an immeadiate improvement unlike using other types of blackgate fo .......
80: ANK AudioKits Forum, RE: MonoBlock Plate Voltage & Sound Quality (0.00)
Posted by richardcooper2k on 2008-02-02, 09:14:18 (79.75.7.20)
i don't know as when i got the first mono running at 460v i didn't spend any time listening as i thought the voltage might damage the caps/valves what did make a difference for me was going to wkz in .......
81: ANK AudioKits Forum, RE: MonoBlock Plate Voltage & Sound Quality (0.00)
Posted by richardcooper2k on 2008-01-31, 16:50:59 (194.164.88.22)
an advantage of the resistor between rectifier valve and choke is it decreases the resonance of the power supply by stopping ringing from the transformer. i put 300ohm in my monos to bring B+ down to .......
82: ANK AudioKits Forum, RE: Monoblock Microphony (0.00)
Posted by richardcooper2k on 2008-01-17, 13:13:20 (79.75.75.61)
very strange ! maybe a disection will reveal the problem with the offending item .......
83: ANK AudioKits Forum, RE: 5687 instead of 6sh7 in interstage amplifiers? (0.00)
Posted by richardcooper2k on 2008-01-15, 15:47:53 (82.38.152.230)
sounds like a good reason to try it to me ! .......
84: ANK AudioKits Forum, RE: 5687 instead of 6sh7 in interstage amplifiers? (0.00)
Posted by richardcooper2k on 2008-01-15, 13:37:44 (82.38.152.230)
out of interest.....why do you want to try 5687.....don't you like 6sh7 ? i have heard the c3g makes a good driver for 300b, anyone tryed this ? .......
85: ANK AudioKits Forum, RE: Monoblock Microphony (0.00)
Posted by richardcooper2k on 2008-01-15, 13:31:51 (82.38.152.230)
can you describe the symptom ? i can't understand how a stand off could be microphonic as i can't imagine it vibrating. a short circuit or a bad cap or a dry joint would be the possibilities that spri .......
86: ANK AudioKits Forum, RE: Kit2 B+1 voltage rating (0.00)
Posted by richardcooper2k on 2007-12-29, 04:56:44 (79.75.95.227)
the b+ voltage should not really be more than 440V in kit 1, otherwise the 450V caps would be out of spec. the instructions say 425V but i find mine runs higher than that in the UK if you connect the .......
87: ANK AudioKits Forum, RE: Happy Holidays!!! (0.00)
Posted by richardcooper2k on 2007-12-21, 15:30:55 (79.67.39.242)
cheers everybody ! .......
88: ANK AudioKits Forum, m3 power supply tweaks for monos (0.00)
Posted by richardcooper2k on 2007-12-13, 13:33:43 (82.38.152.230)
i changed the HT electrolytics to mundorf HT and the film caps to mundorf silver in oil in the L3 (M2)power supplies today. don't know how much each contributed as i put them both in together. the sou .......
89: ANK AudioKits Forum, RE: SRPP/5687 - love it or hate it ? (0.00)
Posted by richardcooper2k on 2007-12-08, 04:28:08 (79.75.62.14)
regarding power supply, something i've been wanting to try but havn't got round to it yet is a regulator in the supply to the input/driver stage .......
90: ANK AudioKits Forum, RE: SRPP/5687 - love it or hate it ? (0.00)
Posted by richardcooper2k on 2007-12-07, 03:28:27 (79.75.11.18)
have you tried 7119 instead of 5687 - this gives a different sound which some people like ? mixing up topologies like srpp and set often gives a better sound as the associated sound artifacts are diff .......
91: ANK AudioKits Forum, RE: Maybe Guido Tent filament supply would be a good idea ?? (0.00)
Posted by richardcooper2k on 2007-12-05, 15:44:44 (82.38.152.230)
wonder what the cicuit is ! .......
92: ANK AudioKits Forum, RE: monoblock filament supplies (0.00)
Posted by richardcooper2k on 2007-12-05, 00:06:47 (82.38.152.230)
i just ordered some 31dq10 by coincidence ! for monos and preamp are you going to drop the voltage with a resistor or leave it as it is ? (schottky diodes have no voltage drop accross them whereas nor .......
93: ANK AudioKits Forum, RE: Audio Note Kit 4 price? (0.00)
Posted by richardcooper2k on 2007-12-04, 13:11:09 (82.38.152.230)
check it out at : http://www.audionotekits.com/kit4.htm all your answers should be there i think ! .......
94: ANK AudioKits Forum, RE: Kit1 : Replacing the PCB valve board (0.00)
Posted by richardcooper2k on 2007-12-04, 03:27:30 (79.75.115.14)
what coupling caps were you using before the mundorfs ? .......
95: ANK AudioKits Forum, monoblock filament supplies (0.00)
Posted by richardcooper2k on 2007-12-04, 02:51:58 (79.75.115.14)
i've noticed that there is no capacitor accross the output from the filament supplies so any contribution from the regulator is not filtered before it reaches the 300B cathode which is directly in the .......
96: ANK AudioKits Forum, RE: Passive VS active PSU for preamps (0.00)
Posted by richardcooper2k on 2007-12-04, 02:24:09 (79.75.115.14)
i have heard about people not liking the sound of regulators but at the same time recognising that they can inmprove the sound. they got round this by adding some r and c after the reg to filter out t .......
97: ANK AudioKits Forum, RE: I don't know why it is so hard to get volume knobs right? (0.00)
Posted by richardcooper2k on 2007-11-26, 03:13:56 (79.75.110.179)
yes, they would do the job. easier than working out the resistor values for yourself. they will just contain one resistor in series with the signal and one from signal to earth. resistor to earth is u .......
98: ANK AudioKits Forum, RE: I don't know why it is so hard to get volume knobs right? (0.00)
Posted by richardcooper2k on 2007-11-23, 01:50:28 (79.75.61.158)
if you want to put an attenuator on the input from your cd player to then you need to put one resistor in series with the signal and another from the signal wire to earth wire. this is so the impedanc .......
99: ANK AudioKits Forum, what phono cart do you use ? (0.00)
Posted by richardcooper2k on 2007-11-21, 05:45:05 (79.75.58.116)
what phono cartridges are people using ? (i'm wondering about a change) .......
100: ANK AudioKits Forum, RE: M3 at Low listening volumes (0.00)
Posted by richardcooper2k on 2007-11-20, 11:12:57 (79.75.7.27)
you could try shunting the volume pot. see http://www.wduk.worldomain.net/forum/showthread.php?t=198 this is primarily to reduce the degenerative effect of the volume pot but it also reduces sensitivi .......
101: ANK AudioKits Forum, RE: ANK1 - 300B Bypass cap (0.00)
Posted by richardcooper2k on 2007-11-12, 00:34:05 (79.75.8.211)
now thats something i've been wondering about - what differences to the sound/improvements (if any) have people noticed when they have bypassed blackgate electrolytics with film capacitors ? and what .......
102: ANK AudioKits Forum, wkz alternatives (0.00)
Posted by richardcooper2k on 2007-11-01, 06:17:10 (79.67.57.3)
the supply of 100+100uF 500v blackgate wkz caps seems to have run out. i wanted to put them in the power supply of my monos. it was suggested to me to put 220+200uF 350v in series but this seems too e .......
103: ANK AudioKits Forum, RE: Achieving ultra quiet with M3 pre (0.00)
Posted by richardcooper2k on 2007-10-09, 09:12:28 (194.164.88.22)
and me ! .......
104: ANK AudioKits Forum, RE: new Mono Block Product Announced (0.00)
Posted by richardcooper2k on 2007-07-29, 04:27:51 (194.164.88.22)
brian, did you get my e-mail regarding when i can and can't take delivery of these ? .......
105: ANK AudioKits Forum, RE: 300b grid current ? (0.00)
Posted by richardcooper2k on 2007-07-07, 03:40:28 (88.106.216.201)
i'm getting a lot more than that. can't remember exactly but maybe 30v on one of the 300bs and dropping as the amp is left on. maybe its a leaky coupling cap ? .......
106: ANK AudioKits Forum, RE: 300b grid current ? (0.00)
Posted by richardcooper2k on 2007-07-05, 17:44:19 (212.139.199.253)
i am measuring a dc voltage - should there be one ? .......
107: ANK AudioKits Forum, 300b grid current ? (0.00)
Posted by richardcooper2k on 2007-07-05, 03:06:58 (80.43.113.192)
i have noticed that one of the grids on the tj mesh 300bs in my kit one is a t 0v and the other isn't. the voltage on the one that isn't 0v seems to fall over time after switch on. is this likely to b .......
108: ANK AudioKits Forum, RE: Almost ready for my last M3 upgrade, I think. (0.00)
Posted by richardcooper2k on 2007-06-06, 11:04:58 (194.164.88.22)
i'd be interested in the details of what you did, both to the power supply and the line stage. if you could accompany that with an explanation of why you did it that way, even better .......
109: ANK AudioKits Forum, RE: AN Kit 1 : upgrade answers (0.00)
Posted by richardcooper2k on 2007-06-02, 15:28:20 (194.164.88.22)
if you look on thorsten's website at his 300b legacy power amp, it has valve regulated ht. i don't know enough to say wether you could use this power supply as it is in a kit one, or wether it would n .......
110: ANK AudioKits Forum, Re: Stacking the AN Kits (0.00)
Posted by richardcooper2k on 2007-05-03, 07:18:59 (80.47.166.213)
if your phono is an audio note kit it may well be just be a case of putting it in a bigger case and adding the line stage to make the m3 phono kit. check with brian to see .......
111: ANK AudioKits Forum, Re: Stacking the AN Kits (0.00)
Posted by richardcooper2k on 2007-05-03, 04:15:30 (80.47.166.213)
if you look at brians post about the lone star audio fest, a soon to be introduced m3 phono kit is refered to. if you built this you you have your line stage and phono in the same case personnaly i ha .......
112: ANK AudioKits Forum, kit 1 mains tranny buzz reduced (0.00)
Posted by richardcooper2k on 2007-04-24, 04:15:00 (212.139.63.228)
i finally got round to cutting up a bicycle inner tube and putting some between the mains transformer and the chassis on my kit 1. result - i can no longer hear the amp humming between tracks; well wo .......
113: ANK AudioKits Forum, Re: Stepped attenuators - anyone tried the Audio Note? (0.00)
Posted by richardcooper2k on 2007-03-23, 06:59:20 (212.139.122.106)
whoops sorry. i posted a reply and its gone in higher up the thread .......
114: ANK AudioKits Forum, Re: Stepped attenuators - anyone tried the Audio Note? (0.00)
Posted by richardcooper2k on 2007-03-22, 13:28:01 (194.164.88.22)
as i said in my post i havn't tryed it yet, when i have finished building my AN kit pre i will. its only the cost of the resistor to try it out after all it would be a little tricky to impliment in my .......
115: ANK AudioKits Forum, Re: Stepped attenuators - anyone tried the Audio Note? (0.00)
Posted by richardcooper2k on 2007-03-21, 12:47:37 (82.47.190.186)
hi doug i've not tryed a stepped att. but another alternative is to do a shunt pot mod here you put a single resistor (whatever your fav type is) in the signal path of about 90% of the value of your p .......
116: ANK AudioKits Forum, Re: New issue -- more help please (0.00)
Posted by richardcooper2k on 2007-01-29, 05:49:47 (88.110.240.55)
hi doug i experienced a similar problem a while ago . the origional heatsinks for the regs were'nt really big enough so they can run too hot . then the thermal cut out kicks in in one of the regs and .......
117: ANK AudioKits Forum, mains transformer vibration (0.00)
Posted by richardcooper2k on 2005-12-18, 11:31:17 (194.164.88.22)
has anyone got any milage out of mechanically isolating the mains transformer on a kit 1 ( or other gear ) from the main chassis in order to stop vibration being tranmitted to the rest of the amp from .......
118: ANK AudioKits Forum, Re: mods to increase attack ? (0.00)
Posted by richardcooper2k on 2005-12-08, 14:16:09 (194.164.88.22)
thanks for all the great feed back guys - very useful and interesting . i've ordered some nos valves (rca 5u4g , 6sntgt and 2 off 5687) . also a tkd volume pot . cartridge i'll do later - prob goldrin .......
119: ANK AudioKits Forum, mods to increase attack ? (0.00)
Posted by richardcooper2k on 2005-12-03, 07:04:25 (213.78.119.113)
hi there again . thanks for the response re speaker stands . steel ones sonnd a little tricky for the home builder - anyone had success with other materials ? though i won't rule out getting some stee .......
120: ANK AudioKits Forum, speaker stands (0.00)
Posted by richardcooper2k on 2005-12-02, 05:08:33 (213.78.98.84)
has anyone experimented with making speaker stands for the kit speakers ? i looked on the audio note web site to see what the ready made ones looked like but couldn't find any . the only information i .......
121: ANK AudioKits Forum, Re: Big Problems with my Audio Note P2SE (0.00)
Posted by richardcooper2k on 2005-06-10, 02:30:33 (82.38.194.184)
sounds like you've got a short circuit somewhere , could be a capacitor , could be the wiring , could be a valve , could even be the mains trans but i doubt it . you could take a look inside to see if .......
122: ANK AudioKits Forum, Re: Which is the 8ohm vs. 4ohm speaker connection on the rear of Audio Note Kit One amp (0.00)
Posted by richardcooper2k on 2005-05-20, 03:00:00 (82.38.194.184)
if you want to double check this , look inside the amp . the wires going to the 8 ohm speaker posts are black and those to the 4 ohm posts are blue . richard .......
123: ANK AudioKits Forum, Re: Michell Technoarm vs AN arm -2 for TT-2 (0.00)
Posted by richardcooper2k on 2005-05-03, 16:59:06 (82.38.194.184)
hi andy when i asked mark at origin live what the diference between the modified rb250 and the silver arm was he said it was in the armtube and the bearing rather than the wiring . as far as i know t .......
124: ANK AudioKits Forum, Re: Michell Technoarm vs AN arm -2 for TT-2 (0.00)
Posted by richardcooper2k on 2005-04-29, 02:26:07 (82.38.194.184)
i recently went from an origin live modified rb250 ( internal rewire and structural mod )to an origin live silver II tone arm . now ,if i hadn't heard it for myself i would never have believed there c .......
125: ANK AudioKits Forum, Re: loss of sound after fitting new meshplates to kit 1 (0.00)
Posted by richardcooper2k on 2005-04-20, 04:44:58 (82.38.194.184)
the problem occurs after the amp has been on at least half an hour . it seems to be running fine for longer now too , 2-3 hours , though if i switch the power off and on again without a break the prob .......
126: ANK AudioKits Forum, loss of sound after fitting new meshplates to kit 1 (0.00)
Posted by richardcooper2k on 2005-04-16, 14:30:35 (82.38.194.184)
hi there ! i just received a pair of tj 300b meshplates for my kit 1 . after they've been on a while i loose sound on one side . it looks like the heater current goes as there is no orange heater glow .......
127: Inmate Systems, richardcooper2k's listen ! (0.00)
Posted by richardcooper2k on 2005-04-16, 14:10:14 (82.38.194.184)
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