PP 300B all DHT amp project [pic]

K&K Audio / Lundahl Transformers

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216.152.34.45

112A first stage, 71A second, 300B finals.
The 112A and 71A filaments are in a series string using a 45 volt A supply which makes for fixed bias. Low value power resistors in the series circuit sets the operating points. No cathode bypassing and associated LF losses.
Building tube amps again after > 20 years of fixing old radios.

Jeff Goldsmith

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Topic - PP 300B all DHT amp project [pic] - Jeff Goldsmith 18:47:17 06/14/05 (4)

Re: PP 300B all DHT amp project [pic] - Rafal 22:45:59 06/14/05 (3)

Re: PP 300B all DHT amp project [pic] - Jeff Goldsmith 00:32:11 06/15/05 (2)

Re: PP 300B all DHT amp project [pic] - Rafal 09:16:03 06/15/05 (1)

Re: PP 300B all DHT amp project [pic] - Jeff Goldsmith 12:06:40 06/15/05 (0)

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