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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: Re: el34s in a mac mc60 posted by lovetube on July 28, 2006 at 08:58:25:
Love
When I changed the original diode I put in a uf4007 and I had to put a 5.1k resistor in series with it to get the proper neg bias..The mac service lit calls for 435vdc on the plate and -47 on the grid at idle of course..When you change from the selenium to the silicon you have less drop and a high voltage out so the 5.1k limits that..I put in a 3.9k to raise it so now I have minus 49v on the grid.
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Follow Ups
- Re: el34s in a mac mc60 - MIchael Samra 12:49:59 07/28/06 (2)
- Re: el34s in a mac mc60 - lovetube 19:13:09 07/28/06 (1)
- Re: el34s in a mac mc60 - MIchael Samra 17:58:20 07/29/06 (0)
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