I have and amp I snagged on E-Bay that is a homebrew using 6CB6A's on input and 6GU7's long tail phase invertor and outputs are 6GK6's push/pull. It uses a terminal strip for inputs/outputs. I pulled the inputs from the terminal block as it buzzed really bad and rewired with rca's. It works with no noise now but the gain is way to high ie: at 1/4 volume it is full out and distorts as I turn up the gain. Gain is via two pots one for each channel directly into the 6CB6A's strapped triode. I soldered a resistor from input to volume pot (240K) but still to much gain. I have some 510K's I'm going to try but I'm not sure if this is the way to go about it.
The other dilemma is that only one set of windings is connected for outputs. The transformers are Thordason with 2/4/8/16/32 ohm taps. How do I decipher the other taps? I new on the learning curve for tube gear.
The other dilemma is that only one set of windings is connected for outputs. The transformers are Thordason with 2/4/8/16/32 ohm taps. How do I decipher the other taps? I new on the learning curve for tube gear.
Schematic? If someone sold you a homebrew amp without one, you've been hosed. If you got one, there's probably a way to drop the gain in a more elegant way than just padding the input.
Well I don't know if I got hosed. I paid $65.00 bucks for the amp and thought it would be a great amp to experiment with. The layout is really clean and I'm going to take a stab at drawing up the schematic myself. I've almost finished the power supply. It is choke/cap/choke/cap for b+. Filaments are drawn from 120V off transformer. Uses sprague atoms for filtering and orange drops for cou;ing caps. All resistors are gold banded. No schematic as it was probably someone elses experiment and I thought I could use it for testing and modding for fun, not serious listening.
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