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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: Dyanaco ST-35 Questions please... posted by Ivan303 on August 9, 2001 at 18:49:43:
The ST35 does tend to run fairly warm, but several things are worth checking as they will contribute to increased heat. Do change the coupling caps (.1uf/400v), they often get leaky. While you're at it change C3 (.22uf/200v) Check the filter cap and replace as necessary. If you can, measure leakage under working voltages, or measure ESR.C1 (.1uf/16v ceramic) cap does horrid things sonically, replace it with most any poly cap for a big improvement.
A small muffin fan (I like a 220v fan on 110v - runs sloooow) exausting up on top of the case will keep the temp way down.
As you've guessed, the bias is not adjustable - the ST35 uses cathode/self bias. I've tried individual bias resistors in an ST35. Although it sounds like a good idea, it sounded really poor IMHO. I'd stick with the original design. The EI 6BQ5's sound pretty darn nice and are quite inexpensive.
A manual is useful, contact me privately if you need a copy. Schematic for the ST35 (and all other vintage Dynaco tube gear) is on my web page below.
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Follow Ups
- Re: Dyanaco ST-35 Questions please... - Gary Kaufman 08/9/0119:56:00 08/9/01 (5)
- Re: Dyanaco ST-35 Questions please... - Ivan303 09:03:55 08/11/01 (0)
- Re: Dyanaco ST-35 Questions please... - JohnR 00:24:41 08/10/01 (2)
- Re: Dynaco ST-35 Questions please... - Gary Kaufman 10:25:50 08/10/01 (1)
- Re: Dynaco ST-35 Questions please... - JohnR 15:42:06 08/10/01 (0)
- Thanks for the quick help... - Ivan303 20:19:40 08/9/01 (0)
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