[Amps] Building an Amp 101

MU 4CX250B 4cx250b at miamioh.edu
Sun Jan 19 09:32:06 EST 2014

Relays are certainly a possibility, Al, but for a nine band amplifier
things get a bit complicated. My latest project ( 90% completed) is a
duo – band 80m/160m amplifier with a pi– L tank circuit, and for that
I am using two DPDT vacuum relays, each of which cost over $100.
Scaling that up to a nine band amplifier doesn't seem very practical
or cost-effective.
Jim w8zr
Sent from my iPhone

> On Jan 18, 2014, at 8:52 AM, Al Kozakiewicz <akozak at hourglass.com> wrote:
> Why not use relays appropriate for the switching duty?  Then the bandswitch can be just about anything or even remotely controlled.  Plus you can locate the switch where it's convenient to operate instead of being constrained by the necessity to place it close to the RF components.
> Al

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