Kevin Ravenhill wrote:
> a visitor told me the "sweet spot"
> was probably were the two ears were copying best was were there was a
phase
> shift in the audio approaching 90 degrees thus giving what we now know is
> the extra sensitivity of the I and Q channel reception condition.
>
> Larry
> VA3LK
I have also experienced noticeably easier copy of weak CW in noise when at a
distance from the headphones - in fact I find that turning up the AF gain a
bit and leaving the headphones on a table provides an effective method of
monitoring activity whilst doing other things. I must admit, though, that I
have not been aware of any definite "sweet spot" whilst moving around the
room.
Has anyone experimented with phase shifted / delayed audio, i.e. with "raw"
audio fed to one half of the headphones and a (variably) phase-shifted /
delayed version fed to the other half?
Kevin
G1HDQ
I was thinking on similar lines. My suggestion is to electronically
simulate "walking around" by processing the audio to one of a pair of
"stereo" speakers. It should be possible to sweep the phase shift of
the feed to the second speaker (or headphone earpiece) with an
electronically controlled all-pass network, and sweep at much higher
phase rates that are equivalent to "running around" the shack. Sort of
a couch potato similation :)
Bob ZL2CA
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