[Collins] Need advice: diode load output on R-390A

[Tom Frobase]

Dr. Gerald N. Johnson wrote:
> On Sat, 2009-10-03 at 10:05 -0700, C E wrote:
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>> All:Does this diode load output on the R-390A require a preamp? I would like to homebrew a 6V6 single ended amplifier to obtain better audio output.  Inquiring minds want to know. 73 de Cal, n6KYR/4
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> A 6C4 might be a better choice given the audio phool mentality these days.  There is also a mod floating around that replaces the output tube with a 6AQ5 giving a nice solid 5 watts output. ... tom, N3LLL
> Usually a triode like a 6AT6 (half a 12AX7 would be
> similar) to develop the 12 volts or so peak that the 6V6 needs. The
> detector probably puts out no more than half a volt. And that's what is
> at the diode load. The typical first audio triode has a mu of about 100.
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