You don't want any crystal or mechanical filtering ahead of noise
blanker detection.
Carl Moreschi N4PY
58 Hogwood Rd
Louisburg, NC 27549
www.n4py.com
On 12/15/2014 11:49 AM, Peter Bertini wrote:
*"I know that in the 1950's Collins did actually use a separate
blanking detection receiver that ran on 9 mhz with its own antenna. I never
used one but it must have been good."*
The KWM-2 blanker ran on 40-MHz. There was probably too much interference
in the HF region, and low VHF would give better results due to being able
to respond to locally generated noise spikes.
One thing I may have screwed up in my Omni VI is that there is either a SSB
or CW roofing filter in line with the first filter.
Pete
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