Recent content by KWS
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Replacement upgrade for TI TL071CP (JFET Input Op Amp)
ADA4627 for sure!- KWS
- Post #11
- Forum: DIY (Do-It-Yourself) Discussions
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ALPS RK-50 QUAD
I found one in ebay @35Euros each.Try to search the ketwords"ALPS Motor Poti Motorpoti Quad Potentiometer 50k log 850555".Enjoys!- KWS
- Post #4
- Forum: DIY (Do-It-Yourself) Discussions
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SOHA II cuts out after a few minutes then cuts in again - repeat
I faced the same problem be4 in my SOHA ii when using OPA627 so i tried back OPA134 and i solved all the questions.The main reason i think is the "too" high slew rate for some opamps such that it was too "sensitive" to compensate to the DC offset.BTW,try to let the output transistors warm up for...- KWS
- Post #4
- Forum: DIY (Do-It-Yourself) Discussions
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SOHA II cuts out after a few minutes then cuts in again - repeat
try to use another model of opamps for dc servor- KWS
- Post #2
- Forum: DIY (Do-It-Yourself) Discussions
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Post pics of your builds....
50K 25steps Pot :D- KWS
- Post #8,477
- Forum: DIY (Do-It-Yourself) Discussions
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SOHA II Builders Thread
Hi all!I m building a SOHA ii but got some problems for the buffer DC offset.Please advise. I used 1.5M for R15, Q6,Q7=2SC2238 from TOSHIBA, OPA627au for both opamps Ibias =100mA(Voltage accross R10(2R2) is around 220mV) V+ = 15V V- = -14.95V and no tube is installed for...- KWS
- Post #1,545
- Forum: DIY (Do-It-Yourself) Discussions
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Post pics of your builds....
SOHA I AMP with Mullard 12AU7 Square Getter~- KWS
- Post #8,342
- Forum: DIY (Do-It-Yourself) Discussions
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Look at what I picked up yesterday :D
What did you get from HK?- KWS
- Post #39
- Forum: DIY (Do-It-Yourself) Discussions
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Post Your Photography Here #2
- KWS
- Post #7,414
- Forum: Members' Lounge (General Discussion)
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Post pics of your builds....
My SOHA 1 with 12SN7- KWS
- Post #7,362
- Forum: DIY (Do-It-Yourself) Discussions
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Post Your Photography Here #2
Quote: Thank you so much.- KWS
- Post #6,924
- Forum: Members' Lounge (General Discussion)
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