On Sun, 10 Jan 1999 15:37:33 -0700 John Lyles <jtml@lanl.gov> writes:
SNIP
>Our recent amplifier for 2.8 MHz runs with a 15 uH Multronics inductor
>in
>the pi-network output. I've got a little over a turn unused, and did
>not
>bother to short it. It hasn't caused any problems.
>
>John
>K5PRO
Several ham amps including the MLA-2500 use a non shorting switch with no
apparent problem. I have never replaced one anyway.
The key to success may be in selecting the switch ratings to begin with.
OTOH, the B&W- Viewstar PT-2500A had to resort to a 7KV rated Model 86
switch in order to stop the arcing in a shorted turn Pi-L design.
There is more to proper amp design than cutting a few holes and saying
"Hola".
73 Carl KM1H
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