One simple way to improve the input swr to any amplifier is to add a 1 or 2
db attenuator at the input. The greater the attenuation, the greater the
improvement in swr. It does not make sense to do this if you barely have
enough drive power, but the Alpha 87a drives easily.
A 1 db attenuator only needs a 15 watt continuous rating for most
amplifiers. Either a T or pi type will work.
A 3 db pad would mean that you would never have greater than a 2:1 swr into
any amplifier, although the power dissipation would climb dramatically for
the attenuator.
And, Happy New Year
Colin K7FM
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|