In Reply to: Looking for Dynaco MKIV owner's using the VTA boards set up for 12AU7 lo-gain posted by Michael Norona on March 17, 2012 at 05:29:09:
R11-14 33K 2W
R15-16 6.8K 1W
R17-18 12K 2W
R19-22 30K 2W
For C-13-14 you can go as high as 120uF and for C15-16 as high as 47uF. I like the Pansonic parts here as they fit well, sound good and are sharply priced.A bit of further advice, two of the .1uF caps are in the signal path, some people will give you BS that these have no effect on the sound. And that would be completely wrong. Use a high quality cap here just as you do in the coupling positions.
You might also like to try 12BH7s in place of the 12AU7s. The transformers will run a touch hotter, but with the independent power supplies it will not be an issue. They will yeild a sound that is darker and more centered, which may suit you......or not. Happy hunting.
Edits: 03/17/12
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Follow Ups
- I use the VTA low gain board in an ST-70, so there is no difference......... - viridian 10:03:57 03/17/12 (7)
- RE: I use the VTA low gain board in an ST-70, so there is no difference......... - Michael Norona 10:18:12 03/17/12 (6)
- RE: I use the VTA low gain board in an ST-70, so there is no difference......... - Michael Samra 16:27:55 03/17/12 (5)
- "panasonics are one of my favorites of the film caps at a reasonable price".... - Cleantimestream 21:24:53 03/17/12 (0)
- Agree with my guru Mike on the K40Ys. And Mike I hope that you feel better......... - viridian 19:14:13 03/17/12 (3)
- RE: Agree with my guru Mike on the K40Ys. And Mike I hope that you feel better......... - Michael Samra 02:09:16 03/18/12 (2)
- Nice build Mike! And you are right there is plenty of room. nt - viridian 08:47:01 03/18/12 (1)
- RE: Nice build Mike! And you are right there is plenty of room. nt - Michael Samra 13:21:02 03/18/12 (0)