[Elecraft] K3: new feature idea / question

[pd0psb]

Smart thinking!

Though using two receivers for this may be quite difficult to implement.
They have to be *exactly* identical to obtain phase cancellation.
That means AGC timing, roofing filter ripple, signal path gains, everything.
I think this will be hard with the K3 and SubRX.

The outboard noise-cancellation boxes have a much shorter/simpler and wider
signal path, making cancellation easier. It may also be a better place to do
this at the front-end and not at the back-end of a receiver.

It would be a nice experiment though!
How about just phase reverting the SubRX audio temporarily and give it a
try?

73'
Paul
PD0PSB









 



Brian Machesney wrote:
> 
> I was just reading about the differing levels of success that people have
> with "active noise cancelling" units. It occurred to me that one should be
> able to achieve the same kinds of results using the second RX and separate
> antenna in the K3 - with the addition of control over the phase (delay) of
> the arriving signal. On its face, it would seem that one could achieve
> destructive interference between "the noise only" coming from a "sense"
> antenna and "the noise + signal" coming from a better receive antenna.
> 
> Thoughts?
> 
> -- 
> 73 -- Brian -- K1LI
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