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Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum |
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#1371 |
diyAudio Chief Moderator
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I had built with resistive load non bootstrap and bootstrap and I kept the latter with Teflon input. Its easy for anybody to make the configs and check preference in own system and taste anyway. Tnx for the virtual pots.
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#1372 |
diyAudio Member
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LL1668 gapped 50 mA maybe http://www.lundahl.se/pdfs/datash/1667_68.pdf windings in series 100H 680 DCR
http://www.diyparadiso.com/price/transfo/LLchoke.htm Last edited by stajo; 6th January 2013 at 10:45 AM. |
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#1373 |
diyAudio Member
Join Date: May 2007
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Hey Salas,
I donīt understand: "with resistive load non bootstrap" Can not work without severe distortion. Stajo, 1668 was actually one of the std chokes I had in mind. |
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#1374 |
diyAudio Chief Moderator
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It can at low bias current and highish amp load. At about -60dB THD for ~6VPP.
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#1375 |
diyAudio Member
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Heres the breadboarded circuit for starters. By an incident I already had it on my breadboard. Now letz see if I can warp up a PSU b4 the kids storm the barn. 115 H 950 DCR Hinchley chokes (robbed from Perka, Lars
![]() ![]() Staffan Last edited by stajo; 6th January 2013 at 11:55 AM. |
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#1376 |
diyAudio Member
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Well I choosed to make a "livingroom proto" instead since I have kids running around. I'm always nervous mounting touchable HV stuff in the livingroom. I made it like a AZ1 - 30 uF motorrun - 10H - 50 uF motorrun common chassie and then I made some plates to fit for different configs.
![]() First out is the 6V6 chokeloaded CF. It sticks a 2,2R and double 47 uF for each channel. Abour 255 on the anode. ![]() It playes right now and it has a clearly stiffer bass then my former passive. Nice voices too but still a hum and some other disturbances. 99 dB speakers is not nice to me. I will clear up the hum and get back to you with some measurements once I get sober. It will happen any month now. Best Staffan |
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#1377 |
diyAudio Member
Join Date: Oct 2010
Location: Burlington, NC
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My new speakers I'll be HE Altec based setup. In this situation is Cf recommeneded over standard. It will be driving variety is pass amps ranging from 15-20dB of gain.
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...Shape the sound , Man! |
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#1378 |
diyAudio Member
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#1379 | |
diyAudio Member
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Quote:
/S |
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#1380 |
diyAudio Member
Join Date: Oct 2010
Location: Burlington, NC
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Those tubes look kinds smoky
![]() Nice job, BTW. I got these for my rebuild. Thinking about getting BudP to wind me some for the load
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...Shape the sound , Man! Last edited by buzzforb; 24th January 2013 at 09:22 PM. |
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