[R-390] Using Break-In

[Jim Brannigan]

As some others said, it is not even close to "Break-in", but it does the 
job.
True Break-in, defined as hearing the other station between the dots and 
dashes, has to be designed into the T/R combination.
The only radio, IMHO, to achieve "true break-in" are the Ten-Tec radios.
Jim

> Hi Folks,
>     From reading about the break-in feature of the 390A, I *think* it 
> works
> like "receiver muting" does on more modern receivers, but I wanted to get
> some other opinions. If I leave the front panel break-in switch off, I
> believe the 390 just keeps receiving (with no connections to TB103 pin 9),
> correct?  If I turn the front panel break-in switch on, what have I 
> enabled
> circuit-wise?  Can I then ground the rear panel TB103 pin 9 and have the
> receiver mute, or does the receiver then just ground the antenna inputs, 
> but
> allow me to hear the transmitter?
>     I guess the term "break-in" is slightly confusing, as I doubt this is
> really full QSK.
> --Ed G--
>
>
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