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1: High Efficiency Speaker Asylum, Re: altec 602C (0.00)
Posted by dominique on 2005-10-03, 12:30:13 (82.120.228.28)
Hi, Thanks guys for your replies. Regards, Dominique .......
2: High Efficiency Speaker Asylum, altec 602C (0.00)
Posted by dominique on 2005-10-01, 06:37:32 (85.169.41.164)
Hi, I just purchased one Altec 602C 15" speaker, wiating for another one... Does anybody know about the suggested enclosure and volume for such speaker ? Thanks in advance. Regards, Dominique Mafrand, .......
3: Tubes Asylum, 12A4 specifications (0.00)
Posted by dominique on 2005-07-23, 08:53:45 (85.169.40.235)
Hi all, I am looking for any datasheet of the 12A4 single triode. Has anyone got it ( any brand is OK ) ? Thanks in advance. Regards, Dominique, Paris, France .......
4: High Efficiency Speaker Asylum, atlec 400B Diacone and 408A Biflex (0.00)
Posted by dominique on 2005-01-16, 08:48:27 (81.67.88.166)
Hi, Does anyone get information about the recommended enclosures for such speakers ? I recently acquired a pair of 400B and one 408A and would like to use them with adequate volume. Thanks in advance. .......
5: Speaker Asylum, Thanks to the all of you guys, i was suspecting some... (0.00)
Posted by dominique on 2004-07-16, 12:06:42 (212.198.21.15)
drawbacks and sure there are some. I wanted my JBL 2220B to go down further in the bass, i will keep it for mid-bass purposes. Thank you ! Dominique .......
6: Speaker Asylum, QTS factor (0.00)
Posted by dominique on 2004-07-14, 04:52:31 (212.198.21.15)
Hi, I have questions in regard to the "qts" parameter of a loudspeaker. I have been playing with simulation sharewares and noticed that if you increase the "qts" factor of a loudspeaker by adding a se .......
7: SET Asylum, Re: How much is enough power? (0.00)
Posted by dominique on 2004-06-27, 09:44:03 (212.198.21.15)
Hi, Power has always been a widely controversed and discussed matters among the audiophile community. IMHO there are factors as important as the power versus speakers sensitivity dilemna i.e average l .......
8: MagneQuest/Peerless Forum, Nice forum ! Congrats Mike ! (nt) (0.00)
Posted by dominique on 2004-05-09, 08:22:56 (212.198.0.97)
. .......
9: Tube DIY Asylum, Thanks a lot Jim ;-) (nt) (0.00)
Posted by dominique on 2004-04-20, 10:33:43 (212.198.0.97)
. .......
10: Tube DIY Asylum, 4304 dht triode (0.00)
Posted by dominique on 2004-04-19, 09:41:34 (212.198.0.97)
Hi, I am looking for data sheets about the great sounding direct heated triode 4304. Wavac from Japan uses it in some nice amplifiers. The datas i downloaded from the Tube Data Sheet Locator are rathe .......
11: Tube DIY Asylum, Re: 6SN7 and a line preamp (0.00)
Posted by dominique on 2004-03-07, 09:21:11 (212.198.0.97)
Hi, May i suggest you give a try to 6J5 or even to cheaper 12J5 which sounds very nice. Both are single triode, in fact half a 6SN7 or half a 12SN7. You can find 12J5 at USD 2 at Radio Electric Supply .......
12: Bottlehead Forum, Merry Chrismas to you all ! (nt) (0.00)
Posted by dominique on 2003-12-21, 10:00:16 (212.198.0.97)
. .......
13: Tube DIY Asylum, Re: parafeed pentode (0.00)
Posted by dominique on 2003-11-29, 03:18:16 (212.198.0.97)
Thanks Kurt, i'll try it. Dominique .......
14: Tube DIY Asylum, Re: parafeed pentode (0.00)
Posted by dominique on 2003-11-24, 10:15:53 (212.198.0.97)
Hello Kurt, The 5902 pentode i am using is a subminiature one, with a rp of 15K. So it is not exactly a CCS pentode and it could be compared to a triode. However the circuit is very simple : 1) one C4 .......
15: Tube DIY Asylum, parafeed pentode (0.00)
Posted by dominique on 2003-11-23, 08:43:56 (212.198.0.97)
Hi all, I just completed a tiny 2x1W amplifier using a single subminiature 5902 pentode in "parafeed" configuration i.e C4S constant current source as an anode load and mumetal gapless opt. This amp c .......
16: Bottlehead Forum, parafeed pentode (0.00)
Posted by dominique on 2003-11-23, 08:23:47 (212.198.0.97)
Hi all, I just completed a tiny 2x1W amplifier using a single subminiature 5902 pentode in "parafeed" configuration i.e C4S constant current source as an anode load and mumetal gapless opt. This amp c .......
17: Tube DIY Asylum, Re: tétrode parafeed and CCS : help ! (0.00)
Posted by dominique on 2003-09-22, 08:57:45 (212.198.0.97)
Hi, Thank you for your replies. I was suspecting something like the both of you described in your respective mails. I am going to find out a solution, and will let you informed. Again thanks ! Regards .......
18: Tube DIY Asylum, tétrode parafeed and CCS : help ! (0.00)
Posted by dominique on 2003-09-21, 10:29:33 (212.198.0.97)
Hi everybody, I am designing a small single ended "parafeed" amplifier using 807A tetrode as output tubes. The amp has 2 stages. The input-driver tube is a 12J5, it is anode loaded by a Bottlehead C4S .......
19: Amp/Preamp Asylum, Cello Etude passive preamp (0.00)
Posted by dominique on 2003-09-06, 08:45:46 (212.198.0.93)
Hi, Has anyone been using the Cello Etude passive preamp ? Any information about it i.e does it use resistors or TVC's ? Thank you. Best regards, Dominique Mafrand, Paris, France .......
20: Bottlehead Forum, Re: parafeed 71A with EXO 173 (0.00)
Posted by dominique on 2003-08-06, 06:25:19 (212.198.0.93)
Hi again, Just ask Eileen for prices and delay. I don't know whether Mike has cobalt laminations still or not for EXO 173's. Regards, Dominique .......
21: Bottlehead Forum, Re: parafeed 71A with EXO 173 (0.00)
Posted by dominique on 2003-08-06, 06:22:55 (212.198.0.93)
The idea of a 71A stage with C4S anode load sounds great. Adding an EXO173 parafeed phase splitter sounds even better ! The main benefits of a nickel or cobalt core parafeed gapless transformer whatev .......
22: Bottlehead Forum, Re: Doc, a quick bit of advice please. (0.00)
Posted by dominique on 2003-08-06, 06:04:43 (212.198.0.93)
Hi, Both will do the job fine. It will be only a matter of capacitors discharge time, 220K will discharge a bit faster, 330K a bit slower. Regards, Dominique Mafrand Paris, France .......
23: Bottlehead Forum, Re: parafeed 71A with EXO 173 (0.00)
Posted by dominique on 2003-08-05, 23:16:26 (212.198.0.93)
Hi, Yes, you can bias the PP stage through the center tap of the EXO173 which would become an phase splitter autoformer. The 71A anode would go to one end of a parafeed cap, then the other end of the .......
24: Bottlehead Forum, Re: OK...let Me re-phrase my question... (0.00)
Posted by dominique on 2003-08-04, 03:36:29 (212.198.0.93)
Hi, You should try to simulate your power supply configuration using the PSU2D freeware available at the Duncan Munro site : http://www.duncanamps.com As such you could be able to tailor your own psu .......
25: Bottlehead Forum, Re: teflon parafeed caps (0.00)
Posted by dominique on 2003-07-31, 22:44:02 (212.198.0.93)
Hi Dan, Thank you for the info. I was thinking in doing something similar as well as using current source anode loading as suggested by Doc. Will give a try anyway ;^) Best regards, Dominique ::: TOPI .......
26: Bottlehead Forum, Thanks Doc ! <nt> (0.00)
Posted by dominique on 2003-07-31, 10:24:00 (212.198.0.93)
. .......
27: Bottlehead Forum, About parafeed (0.00)
Posted by dominique on 2003-07-31, 09:33:23 (212.198.0.93)
Hi, I am curious about a couple of things related to parafeed topology. First has anyone already played with tetrode and pentode in parafeed circuits ? Can we get a little more bass using a airgapless .......
28: Bottlehead Forum, Re: Dump cartridge or step-up for Seduction? (0.00)
Posted by dominique on 2003-01-08, 10:22:15 (212.198.0.93)
Hi, A step-up transformer seems to be the way to go with a MC cartidge because of the very low level signal to be amplified. Any kind of active devices could induce various noises and distorsions with .......
29: Bottlehead Forum, Re: questions to parafeed experts - part 2 (0.00)
Posted by dominique on 2002-11-25, 10:49:09 (212.198.0.93)
Thanks a lot ! I will let you know about the results. Best regards, Dominique .......
30: Bottlehead Forum, Re: Yes. (0.00)
Posted by dominique on 2002-07-03, 07:59:08 (212.198.0.93)
Here is the picture ! .......
31: Bottlehead Forum, Re: What about a series switch? (0.00)
Posted by dominique on 2002-07-02, 12:55:47 (212.198.0.93)
Badman, Please stay cool. I do not want to sound hostile at all. What the hell have i done or said, my internet friend, to get you so angry ??? You are correct when you say that i don't know anything .......
32: Bottlehead Forum, DC current through an EXO-173 cobalt choke (0.00)
Posted by dominique on 2002-03-10, 09:18:45 (212.198.0.93)
Hello Mike, I have posted a mail today in reply to yours posted on 3.3.02. It is about a simple circuit i intend to use with some DC current through an EXO-173 choke. Unfortunately it doens't appear o .......
33: Bottlehead Forum, Re: EXO-173 (0.00)
Posted by dominique on 2002-03-10, 04:25:05 (212.198.0.93)
Hello Mike, Thanks for all these additional information about the EXO-173 chokes. By the way Eileen told me that i should receive the pair i ordered very soon, which is great. I intend to use this cho .......
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