I will display some ignorance here:
Does the plate current waveform distortion cause any problem at the
fundamental frequency?
Your idea for using a quarter wave stub like that is interesting. For a
single band amplifier, it could replace the rf choke for B+ and avoid all
those pesky resonance problems. Of coarse the plate blocking C would need to
be
removed and used to connect the plate load C (in a pinet) to the output to
keep the B+ off the load C.
73,
Gerald K5GW
In a message dated 3/29/2010 10:29:13 P.M. Central Daylight Time,
jtml@losalamos.com writes:
Has anyone seen anything in print about using a lambda/4 (Quarter
wavelength) stub on the output of an amplifier with a tube. Its a nice
way to bring water, tuning mechanisms into an output circuit, without
looking like a short circuit for the primary frequency. This same stub
is a half wavelength at second harmonic, so it reflects a short right
across the output at F2. This should cause some plate current waveform
modification, depending on where it is located physically with respect
to the plate, i.e., similar to Tyler circuits.
73
K5PRO
John
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