For the past week or so I have been trying to get a 6dj8 to work in place of the 12at7 that can be used in the attached schem as a substitute for the 6n1p. Why was I doing this you ask? Because I had 6 volts available with the psu I was using from another amp and did not want to add another filament transformer. After days of trying unsuccessfully to get it to work, it finally dawned on me that I had a nice little 12vac to 12vdc solid state transformer left over from a previous project that would work just fine. Soooooo, I changed everything back to the original design this afternoon and evening and now it is playing very nicely thank you. Sometimes we just try too hard.
By the way, this is a very easy and straight forward project if you just build it as designed, with lots of gain. Cheap too. And I do love the sound of the 6bq5. Thanks for all the help and advice you guys gave me. I did learn a lot, even if it was a bit frustrating at times trying to get things into spec. By following the original design everything is right close to what it should be. I think I will go ahead and make this one of my permanent amps and that way I will have both a 6bq5 triode connected PP and a 26/26/45 SET amp for my main system.
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Topic - lesson learned-don't try to be too tricky! - vinnie2 15:59:43 08/04/17 (8)
- RE: wildest bread board yet..... - vinnie2 06:51:44 08/05/17 (2)
- RE: wildest bread board yet..... - Triode_Kingdom 11:15:44 08/05/17 (1)
- RE: wildest bread board yet..... - vinnie2 12:15:35 08/05/17 (0)
- thanks to all... I will give 6 vac a try nt - vinnie2 04:41:29 08/05/17 (0)
- 12AT7 runs fine on either 6.3 or 12.6 V........ - Steve O 16:27:15 08/04/17 (3)
- RE: 12AT7 runs fine on either 6.3 or 12.6 V........ - vinnie2 18:35:55 08/04/17 (2)
- RE: 12AT7 runs fine on either 6.3 or 12.6 V........ - Triode_Kingdom 19:48:51 08/04/17 (0)
- RE: 12AT7 runs fine on either 6.3 or 12.6 V........ - Tre' 19:36:19 08/04/17 (0)