Question is this:
I have ECC99 mated with a 1:1/1 phase splitting transformer.
The ECC99's output impedance is too low and I have to add loading resistors on the secondary of the transformer to stablize frequency response.
Is there another way to match impedances without sacrifycing gain??
I think I need a 5K ouput impedance on the tube.
Can I partially bypass the cathode to bump up the output impedance from the 2.3k it is now to 5K?
Or is it better to leave it alone?
Thanks!!!
I have ECC99 mated with a 1:1/1 phase splitting transformer.
The ECC99's output impedance is too low and I have to add loading resistors on the secondary of the transformer to stablize frequency response.
Is there another way to match impedances without sacrifycing gain??
I think I need a 5K ouput impedance on the tube.
Can I partially bypass the cathode to bump up the output impedance from the 2.3k it is now to 5K?
Or is it better to leave it alone?
Thanks!!!
IMO, you should leave things as they are. A low impedance driving the trafo is GOOD for bass extension. Using resistors across the secondaries to control ringing, etc. is a tried and true technique.
BTW, what sort of circuitry is following the P/S trafo.
BTW, what sort of circuitry is following the P/S trafo.
PP 6B4Gs are fairly straight forward. Leave things as they are, with resistors across the secondaries correcting anomolies.
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