It would have to be a surface mount board; the noise blanker board is pretty
small, as it is a simple gating circuit for the audio.
With the Jones filter, you hardly need anything else I find, except perhaps a
heterodyne filter on 40M SSB at night for BC interference from European SW.
The outboard Timewave DSP+ I have works great in the external speaker line or
headphone line as some call it.
Like most noise blankers, the onboard Scout one is pretty specific to mobile
spikes, and does not do anything for atmospheric static, thus, some other
function might be more useful at that point of the circuit. I find the NB
pretty much does nothing for me as I operate mostly 20M and up. When static
gets too bad, I figure a storm is close enough that I disconnect my antenna,
and power and QRT for lightning protection! In fact, having static is a good
reminder you should not be on the air, if it is that bad and close.
I am sure the 160M and 80M operators would appreciate something more effective
in the noise blanker circuit position. Would be a good design challenge.
Wonder if the Radio Shack type circuit which I think is mostly one IC would
One issue is putting any clocking digital processing or microproc circuit in
close to the RF receiver circuits. They are already challenged by the micro
for the keyer and PTO correction tasks. Another good reason to put the Audio
DSP in external box away from the RF circuits, so digital hash is kept at bay.
73, Stuart K5KVH
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