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OTL Asylum OTL, Output Transformerless Amplifier User Group. |
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In Reply to: Re: Tanscendent T8 with 12 ooutput tubes posted by artcheng@netvigator.com on November 25, 2004 at 20:13:49:
One thing, the fuses need to be changed for the higher current capabilities.
As info: I arranged my output tubes in banks of three tubes, each bank with its own bias arrangement and fuse. Unfortunately that doubles the number of coupling caps too. It´s more flexible that way. If I lose one bank I get 0,5V DC on the output, which is not much. Normally DC offset is within +/- 10 mV and drifts slowly. The T8 output stage is very stable, I have had no trouble at all except for one tube that went bad. I just swapped the tube with glowing red anode, readjusted the bias and that was it. No trouble with harming the speakers.
I use PL519, 40V, 0,3A heater. 6 in series can be connected to 230V AC from the wall. No hum.
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Follow Ups
- Re: Tanscendent T8 with 12 ooutput tubes - Bernt 07:06:56 11/26/04 (1)
- Re: Tanscendent T8 with 12 ooutput tubes - artcheng@netvigator.com 08:13:21 11/26/04 (0)
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