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Tweakers' Asylum: Re: 2SK117 or 2SK170 input stage?Better use 2SK389 by Elso Kwak Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: Re: 2SK117 or 2SK170 input stage?Better use 2SK389 posted by groman on January 6, 2002 at 11:42:32:
Hi gronam,
Well, I am into FET inputcircuits these days even for (Movingcoil)- phonoinput. I have no experience with LM194/394 but do have experience with MAT02.
Builded the circuit in the MAT04 datasheet for moving coil cartridge preamplfier, but later replaced the MAT02 with a cascoded 2SK389. Result much better sounding circuit! .
Matching of 2SK117 is difficult; you need a lot of them and the matching will never be as good as a monolitic pair. Also the thermal coupling is bad. This will result in a unstable offsetvoltage because of small differences in temperature between the two halves of the differential pair...
ELSO
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Topic - OPamplifiers, Replacements - groman 02:37:11 01/5/02 ( 89)
- Already Had This Discussion Just A WHile Ago - Jon Risch 16:40:52 01/6/02 ( 3)
- Re: Already.. Take a look! Here.... - groman 17:28:13 01/6/02 ( 2)
- Re: Already.. Take a look! Here.... - Jon Risch 21:06:55 01/6/02 ( 1)
- Thanks, Jon. - groman 00:11:13 01/7/02 ( 0)
2SK117 or 2SK170 input stage? - groman 08:26:09 01/6/02 ( 10)
- Re: 2SK117 or 2SK170 input stage?Better use 2SK389 - Elso Kwak 08:30:24 01/6/02 ( 9)
- Re: 2SK117 or 2SK170 input stage?Better use 2SK389 - groman 11:42:32 01/6/02 ( 8)
- Re: 2SK117 or 2SK170 input stage?Better use 2SK389 - capslock 10:34:58 01/7/02 ( 3)
- Re: 2SK117 or 2SK170 input stage?Better use 2SK389 - Elso Kwak 13:32:42 01/7/02 ( 0)
- Re: 2SK117 or 2SK170 input stage?Better use 2SK389 - john curl 12:00:23 01/7/02 ( 1)
- Re: 2SK117 or 2SK170 input stage?Better use 2SK389 - john curl 13:09:00 01/7/02 ( 0)
- Re: 2SK117 or 2SK170 input stage?Better use 2SK389 - Elso Kwak 01/6/02 13:04:17 01/6/02 ( 3)
- Okay, thanks. <nt> - groman 14:32:23 01/6/02 ( 2)
- Re: Okay, thanks. <nt> - john curl 15:15:53 01/6/02 ( 1)
- It is 6-14mA-117 - groman 17:50:55 01/6/02 ( 0)
join Thread in SET asylum; Single Ended Class A paper - groman 08:12:09 01/6/02 ( 0)
My DesignPhilosofy - groman 06:22:35 01/6/02 ( 0)
Links to W. Jungs Articles.... - Thorsten 16:54:36 01/5/02 ( 5)
- Re: Links to W. Jungs Articles....And a Bit of Help - Elso Kwak 03:39:39 01/6/02 ( 1)
- App notes, can be tutorial, Thanks! - groman 06:12:05 01/6/02 ( 0)
one more.... - Thorsten 16:57:40 01/5/02 ( 2)
- Re: one more.... - john curl 14:19:45 01/6/02 ( 1)
- Re: one more.... - Thorsten 12:06:25 01/8/02 ( 0)
Re: OPamplifiers, Replacements - Brian T. 16:22:32 01/5/02 ( 1)
- Seen LT1028 in RIAA-amps - groman 19:38:06 01/5/02 ( 0)
AD797 internal design attracts me. - groman 11:34:47 01/5/02 ( 17)
- If so, then look at the AD811 or LM6171/72/6181/6182 and co.... - Thorsten 13:14:36 01/5/02 ( 16)
- Re: If so, then look at the AD811 or LM6171/72/6181/6182 and co.... - capslock 14:24:54 01/6/02 ( 0)
- Re: If so, then look at the AD811 or LM6171/72/6181/6182 and co.... - Elso Kwak 02:33:44 01/6/02 ( 13)
- Thorsten will learn, someday..... - groamn 05:57:53 01/6/02 ( 11)
- Or maybe I have already learned and found some of the answers you are seeking? - Thorsten 06:45:19 01/6/02 ( 10)
- Apologies for bad expression! Thorsten - groman 00:31:43 01/7/02 ( 0)
- Re: Or maybe I have already learned and found some of the answers you are seeking? - Elso Kwak 07:39:46 01/6/02 ( 8)
- Re: Or maybe I have already learned and found some of the answers you are seeking? - Thorsten 08:00:56 01/6/02 ( 7)
- Re: Or maybe I have already learned and found some of the answers you are seeking? - terryb 11:37:49 01/6/02 ( 1)
- Re: Or maybe I have already learned and found some of the answers you are seeking? - Thorsten 12:11:04 01/8/02 ( 0)
- Re: Or maybe I have already learned and found some of the answers you are seeking? - Elso Kwak 08:26:42 01/6/02 ( 4)
- Re: Or maybe I have already learned and found some of the answers you are seeking? - Thorsten 09:05:36 01/6/02 ( 3)
- Re: Valid Comparison? - Elso Kwak 13:17:15 01/6/02 ( 2)
- Re: Valid Comparison? - Thorsten 03:42:47 01/7/02 ( 0)
- Re: Valid Comparison? - Ric Schultz 22:36:46 01/6/02 ( 0)
Re: If so, then look at the AD811 or LM6171/72/6181/6182 and co.... - Thorsten 05:24:15 01/6/02 ( 0)
Re: If so, then look at the AD811 or LM6171/72/6181/6182 and co.... - groman 14:09:15 01/5/02 ( 0)
Another bit of reading..... - Thorsten 06:54:05 01/5/02 ( 10)
- Re: Another bit of "reading"..... - Elso Kwak 02:38:51 01/6/02 ( 1)
- Re: Another bit of "reading"..... - Thorsten 05:25:36 01/6/02 ( 0)
Re: Another bit of reading..... - john curl 15:11:19 01/5/02 ( 0)
my philosophy in design of amps - groman 07:42:08 01/5/02 ( 6)
- Constant current source vs. resistor. Differences? - groman 08:44:56 01/7/02 ( 5)
- Re: Constant current source vs. resistor. Differences? - Elso Kwak 13:17:29 01/7/02 ( 4)
- you did not quite understand - groman 15:16:49 01/7/02 ( 3)
- Re: you did not quite understand - Elso Kwak 23:42:40 01/7/02 ( 2)
- Current >T1 at the same time as current >T2, can not... - groman 14:53:02 01/8/02 ( 1)
- Re: Current >T1 at the same time as current >T2, can not... - Elso Kwak 02:09:12 01/9/02 ( 0)
Re: OPamplifiers, Replacements - John S. 04:36:26 01/5/02 ( 8)
- MBL 6010 uses NE5534 for preamp and it costs US$13,800. - jameshin 11:56:59 01/5/02 ( 1)
- Is that NE5534A??? - groman 13:01:07 01/5/02 ( 0)
How do you unsolder DIL8? - groman 05:45:32 01/5/02 ( 5)
- Re: How do you unsolder DIL8? - Brian T. 16:33:30 01/5/02 ( 0)
Unsoldered JRC 4558 from Pioneer PD-S504 - groman 07:06:32 01/5/02 ( 1)
- Re: Unsoldered JRC 4558 from Pioneer PD-S504 - John S. 12:22:03 01/5/02 ( 0)
Re: How do you unsolder DIL8? - John S. 06:44:01 01/5/02 ( 0)
Re: How do you unsolder DIL8? - Thorsten 06:37:12 01/5/02 ( 0)
Re: OPamplifiers, Replacements - Thorsten 03:13:10 01/5/02 ( 25)
- Any better Comparision? Suggestion??? - groman 03:27:09 01/5/02 ( 24)
- Re: Any better Comparision? Suggestion??? - tvi 05:48:56 01/5/02 ( 7)
- Re:Any better Comparision? Suggestion???Just Listen to the Music!!! - Elso Kwak 03:25:57 01/6/02 ( 2)
- Is it the one JFET-opamp? 2SK170/2SJ - groman 05:50:03 01/6/02 ( 1)
- Re: Is it the one JFET-opamp? 2SK170/2SJ. No this a other One - Elso Kwak 07:24:56 01/6/02 ( 0)
- Re: really great site - look at the Distortion in capacitors section..... - Thorsten 06:45:37 01/5/02 ( 1)
- Re: really great site - look at the Distortion in capacitors section..... - john curl 00:17:37 01/8/02 ( 0)
- Great Site!!! Thank you, tvi (fb=4) - groman 05:58:17 01/5/02 ( 1)
- Translation from Japanese into english of sorts via: - Thorsten 06:41:11 01/5/02 ( 0)
Re: Any better Comparision? Suggestion??? - Thorsten 04:29:37 01/5/02 ( 15)
- Re: Any better Comparision? Suggestion??? - Graham C 10:30:37 01/5/02 ( 10)
- Re: Any better Comparision? Suggestion??? - Thorsten 13:06:11 01/5/02 ( 4)
- Re: Any better Comparision? Suggestion??? - Graham C 15:02:38 01/5/02 ( 2)
- Re: Any better Comparision? Suggestion??? - Thorsten 16:16:22 01/5/02 ( 1)
- Re: Any better Comparision? Suggestion??? - john curl 00:40:37 01/8/02 ( 0)
- Self stuff maybe not up to date? - groman 13:23:03 01/5/02 ( 0)
5532, still worth the price! - groman 11:02:01 01/5/02 ( 4)
- Re: 5532, still worth the price! - john curl 15:23:58 01/5/02 ( 1)
- Agree, see 'Self stuff maybe is...' <nt> - groman 16:03:41 01/5/02 ( 0)
Re: 5532, still worth the price! - Thorsten 13:09:44 01/5/02 ( 1)
- HaHa, you little devil!!! 5532 is superior! - groman 13:30:27 01/5/02 ( 0)
Re: Any better Comparision? Suggestion??? - tvi 05:54:55 01/5/02 ( 2)
- Re: Any better Comparision? Suggestion??? - Robin Cook 14:08:02 01/5/02 ( 1)
- Re: Any better Comparision? Suggestion??? - Robin Cook 14:13:38 01/5/02 ( 0)
Will read. Thanks T! (fb=4) - groman 05:39:19 01/5/02 ( 0)