[Amps] AL-1500 pi-network capabilities

[Phil Clements]

> If the Q is too low, harmonic suppression will be reduced.  If too
high,
> the circulating current in the tank circuit will be increased.  The
> coils and bandswitch in the AL-1500 are, er, not over-engineered (!)
and
> might be damaged under these conditions.
>
> -- 
> 73,
> Vic, K2VCO

You are far too kind, Vic!

IMO, the tank circuit in the SB-220 is as robust as the AL-1500, and
the 220 will not do near 2400 watts out.

I remember amp projects in the '60's and '70's that had larger coils
in the tuned input circuit!
Perhaps Ameritron has only one coil winding jig. All the models look
pretty much the same to me.

Miniaturization is nice, but not in a QRO type tank circuit. A good
test to see if you have under-engineered
a tank coil/bandswitch is to check their temperature just after a
80-160 meter RTTY contest weekend.

(((73)))
Phil, K5PC