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
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Subject: [Elecraft] K3: new feature idea / question
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
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
G4ILO said
you need at least two extra controls, preferably three, one to vary the
phasing of the two signals and the others to adjust the amplitude of the two
inputs so that the noise levels cancel exactly.
Sounds like a description of the DX Engineering NCC-1
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
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
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
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