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Classic gear from yesteryear; vintage audio standing the test of time.

I put in a choke in place of the 50 ohm resistor

like what's in the Mac Mc240 and the Citation 2.Now I had a 50 ohm choke in there at 1hy.I took it out and put in a .5hy at 30 ohms..The B+ went up 2.3 volts.having a choke there really improves backgrounds,clarity,and overall control of the amplifier.I'm going to use the HF89 bias scheme and the reason I like the older bias schemes where they use a balance and bias pot,it is so much easier to bias because you aren't chasing the bias so much.
"For every complex problem there is an answer that is clear, simple, and wrong" H. L. Mencken


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