Tracking Receivers

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  • Updated 8 months ago
Can I listen to two slices simultaneously (in both ears) and have the slides track each other maintaining a 75 Hz offset in frequency? That is, when I tune around the band in receive, I want to maintain a 75 Hz frequency separation and hear both slices together in both ears.  If this is possible, what is the set-up?  
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K3ZJ - Dave

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Posted 9 months ago

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Tim - W4TME, Customer Experience Manager

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Why a 75 Hz offset in frequency?
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Chris DL5NAM

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NF Diversity
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Tim - W4TME, Customer Experience Manager

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NF?
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K3ZJ - Dave

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Chris is correct. Listening to CW at about 700 Hz, something between 65-80 Hz is within the "equivalent rectangular bandwidth" of our ears.  Just thought I'd play around with this to see if it helps me on weak signals.  Pete, N8PR, writes that it can give the equivalent of a 2-3 dB boost.  See his article that begins on p.16 of this month's (January, 2018) CQ Magazine. 
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Chris DL5NAM

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yes, i have done with the 2. VFO of a TRX. With a small shift (cant remember 50 Hz or 75 Hz or ..) you get a like 3D sound 
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Tim - W4TME, Customer Experience Manager

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Got it.  No, there isn't a way to sync two slices where one is at a different frequency than the other and both tune simultaneously.  However, this would be an easy program to write using the API.

There is also a binaural listing mode in SmartSDR that might help as it splits the recovered audio and one channel is at phase 0 and the other one is 180 degrees out of phase.
(Edited)
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K1DBO

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Dave,

Slice Master 6000 already supports keeping two slices in sync. I'll add an option to specify an offset in my next release.

--Don
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K1DBO

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Dave,

Take a look at the recently released Slice Master 6000 v0.9.5.  It has the ability to fulfill your wildest dreams... or at least give you that 75hz offset you were looking for.

You  can find the details in my Slice Master thread.

--Don
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K3ZJ - Dave

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Thanks, that was fast!  I will check it out this weekend if there isn't too much snow on the road up to my operating QTH.  
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K1DBO

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You're welcome.

If you have any trouble with the setup, feel free to ask.  

--Don