Jerry,
I'll repeat that on my Corsair II when the amp is disabled a 3dB Tee attenuator
is switched in, so the mixer is never connected directly to the antenna.
Looking at the schematic you could believe that including the attenuator didn't
cost TenTec any extra components - the resistors forming the Tee double as the
current limits for the switching diodes.
73,
Steve G3TXQ
Perhaps I mis-wrote. Its not really an optional preamp but the entire RF
stage that is unhooked connecting the antenna directly to the mixer.
Some might consider that the normal RF stage, not a preamp. On 75
meters, mine is disconnected most of the time. Need the additional
dynamic range on the top end afforded by reducing the RF gain before
that first mixer. I can't find my Corsair II manual this evening to
check on that attenuator detail.
73, Jerry, K0CQ
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