Tim Wescott wrote:
Any coupling circuit to a class C bipolar transistor amplifier not only
needs to match impedance, it also needs to supply DC current to the base
of the class C stage. Inductive coupling is nice because the average
voltage at the base is nailed at zero and the inductor will guarantee
that enough DC current flows. If you should capacitively couple then
you need to load the base of the final stage with a back-biased diode or
a resistor to provide the current -- otherwise your coupling capacitor
will just charge up until no current flows into your final's base and
you no longer get amplification.

Thanks Tim for the info.

I am still a homebrew newbie and am slowly trying to understand the
circuits
described in SSD. Have long forgotten the circuits which I learnt, back
in
my undergrad days..

Is there any good *theory* text which explains everything?

73
Ramakrishnan, VU3RDD