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

[Don KB2YSI]

That would make logging much easier!

73, Don KB2YSI

On Fri, May 18, 2018, 08:48 John Brier <johnbrier at gmail.com> 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
>> >
>> >
>> > _______________________________________________
>> > 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
>> >
>> _______________________________________________
>> 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
>>
>