I'm a new ham eager to build his first amplifier. Done lots with tube
audio in the past but RF is definitely a different animal. For my first
project I intend to use 813s. They were cheap, I have an abundance of
them, and if I zorch a few in the learning process, I won't be too
My question is this.... In going over the RCA TT-5 manual I found in the
section on tank circuits that you can use a 'series tuned tank' as a way
of defeating high output capacitance. It doesn't give formulae however,
for calculating the values the tank's members other than to state that
you should use a series tuning capacitor with a value several times
larger than that of the tube's capacitance. Nor does it say anything
about the effectiveness of the tank in filtering unwanted emissions. I
have a couple of Bill Orr's books and a few Arrl handbooks but can't
find anything on this type of tank circuit in them.
Has anyone even done this? Where can I find out more about it?
Randall D DuCharme (KD5IZI) Proud to be 100% Microsoft Free!
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