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

Sat May 19 02:51:40 UTC 2018

Probably because I used the wrong term. It is a breakout cable. Here is
what I have. Haven't used it yet, but it should work.

https://www.amazon.com/gp/aw/d/B000068O5H?psc=1&ref=yo_pop_mb_pd_title

73, John Brier KG4AKV

On Fri, May 18, 2018, 16:34 <skristof at etczone.com> wrote:

> John, I'm having a hard time finding a channel splitter on Amazon. Do
> you happen to have a brand name or possibly a URL link to the one that's
> working for you? Thanks!
>
> Steve AI9IN
>
> On 2018-05-18 08:48, John Brier wrote:
>
> > I haven't done this yet but I think others have and I plan to do it one
> > day: most recorders are stereo. Get a *channel* splitter (I bought one on
> > Amazon) and send radio audio to left channel, say, and an external mic to
> > right.
> >
> > For me I plug my headphones into the recorder to monitor the radio so I
> > would have to splice the left channel to both right and left so I didn't
> > have my external mic audio in one ear and the radio in the other.
> >
> > One reason I want to do this is because it will make transcribing QSOs
> from
> > the recording easier. Just open the waveform in Audacity or another
> similar
> > app and you can see anytime you talk on the local mic. Skip there and
> > transcribe the contact. Otherwise for me at least I end up having to
> listen
> > through a lot/most of the recording trying to find myself.
> >
> > 73, John Brier KG4AKV
> >
> > On Fri, May 18, 2018, 08:13 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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>  _______________________________________________
> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership.
> Opinions expressed
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> AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite
> program!
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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
>