[amsat-bb] Recording TX & RX from one or two radios?

[Mark D. Johns]

Any stereo recorder would allow two inputs, L & R.

On Fri, May 18, 2018 at 07:11 Don KB2YSI <kb2ysi at gmail.com> wrote:

> I would think there is a dual input recorder available, one for the RX one
> for the mic, or use 2 recorders and splice the audio later.
>
> 73, Don KB2YSI
>
> On Fri, May 18, 2018, 04:25 Ken M <va7kbm at outlook.com> wrote:
>
> > Hi Patrick,
> >
> > Of course you are right about full duplex recording (kicking myself for
> > not thinking of that!).
> >
> > For HF and all other half-duplex work, especially QRP from the field I’m
> > looking for a wired solution so I don’t record background noise (and I
> use
> > a headset). Anyway, that’s not a satellite application so I’ll take the
> > question elsewhere.
> >
> > Thanks!
> > 73 Ken VA7KBM
> >
> > On May 17, 2018, at 5:21 PM, Patrick STODDARD (WD9EWK/VA7EWK) <
> > amsat-bb at wd9ewk.net<mailto:amsat-bb at wd9ewk.net>> wrote:
> >
> > Ken,
> >
> > It really is simple, if you are working full-duplex. Just
> > record the RX audio. You get the full exchanges, since
> > you will hear yourself and the other stations. A splitter
> > on the speaker of the radio receiving the downlink can feed
> > audio to a recorder and headphones/earphone/earbuds you are
> > using to hear the downlink.
> >
> > For working HF or working satellites half-duplex, I just use
> > a recorder that picks up the radio's speaker audio and my
> > voice with its microphone. Then I get both sides of those
> > QSOs.
> >
> > 73!
> >
> >
> >
> >
> >
> >
> > Patrick WD9EWK/VA7EWK
> > http://www.wd9ewk.net/
> > Twitter: @WD9EWK or http://twitter.com/WD9EWK
> >
> >
> > On Thursday, May 17, 2018, Ken M <va7kbm at outlook.com<mailto:
> > va7kbm at outlook.com>> wrote:
> > Hello AMSATers,
> >
> > I'm looking to record both TX and RX audio to a digital recorder, either
> > at the QTH or in the field (but mainly in the field), in either of two
> > common scenarios:
> >
> > 1. TX from one radio, and RX from a different radio (as in satellite use
> > with one radio for uplink and one for downlink).
> >
> > 2. TX/RX from the same radio (as in a full-duplex radio for FM
> > satellites, or for non-satellite use).
> >
> > I'm wondering if you know of a device (or a published circuit design)
> > that will allow TX/RX recording while isolating the radios from each
> > other and/or a radio's TX from it's RX, while linked to the same
> > recorder? I have to believe this is a well-solved problem within the
> > satellite radio community but I haven't found too many ideas for field
> > use. This is seems to be an easier problem to solve at the QTH if
> > recording to computer, with various sound interfaces (Signalink, etc.)
> > so my main interest is in field use with a digital recorder so I can
> > record my QSO's while juggling two radios plus antenna, etc. The easy
> > alternative is just to record the RX side, which is easy, and works for
> > logging but doesn't give you the full exchange.
> >
> > Thanks & 73!
> > Ken VA7KBM
> >
> >
> > _______________________________________________
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> > to all interested persons worldwide without requiring membership.
> Opinions
> > expressed
> > are solely those of the author, and do not reflect the official views of
> > AMSAT-NA.
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> >
> _______________________________________________
> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions
> expressed
> are solely those of the author, and do not reflect the official views of
> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>
-- 
--
Mark D. Johns
KØJM / MØGZO / ex-9H3DJ / ex-KØMDJ
Brooklyn Park, MN USA   EN35hd
-----------------------------------------------
"Heaven goes by favor; if it went by merit,
   you would stay out and your dog would go in."
    ---Mark Twain