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Rarest Challenger Ever?

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GreenTone007

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Sep 17, 2012, 9:07:13 PM9/17/12
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I have a Bogen Challenger CHA 75A Pa amplifier dated 1974, I need a
schematic, ive found the schem. for the CHA 75 but not 75A, it has 2
power tubes instead of 4 like the 75. Im a guitar amp builder and this
thing just baffles me. Id like to change the preamp to a more guitar
friendly layout, 5f6 or 5e3, but the power section is crazy on this
thing. Any help would be greatly appreciated. thanks in advance.




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GreenTone007

GreenTone007

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Sep 18, 2012, 11:22:33 PM9/18/12
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found out 75 and 75a are same amp just different tubes. thanks




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GreenTone007
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