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

[Patrick STODDARD (WD9EWK/VA7EWK)]

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> 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
>
>
>