Jerry Volpe wrote:
Test Two: Reverse the roles. With the Corsair II transmitting at even
the least output possible the Omni-VI+ presented 'keying' noise across
the entire 20-meter band with a few false signals to boot! Inserting
different first or second IF filters did little to reduce this.
Eeeaaoooouuucchhhhh! Granted the noise floor alternately raising and
lowering with the keyed Corsair was maybe an S-3 to S-4 level but having
that noise constantly present for 24 plus hours..... Hmmmmm.
I've got one of the first INRAD roofing filters made - I chose the 600Hz
model for my Omni 6 as I operate CW. I don't care what kind of signal
is adjacent to the filter skirts - it doesn't get through. Transmitters
with bad key clicks can if the clicky transmitter is producing signals
on the frequency you're receiving but that isn't a fault of the receiver.
For example, I can fire up my ICOM or Drake gear and enable the 600Hz
INRAD filter with the 1.8KC standard filter enabled - as long as I'm
outside the bandpass of the roofing filter the other rigs can't be heard.
Does this help any? The INRAD roofing filter is excellent.
--
73 Jason N1SU
Jason Buchanan - Boxboro, MA
Website: http://n1su.com/
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