[R-1051] Back Panel Plug Diagram

[Nick England]

I went looking at the schematic and probably the easiest place to tap is at
the top of the line level control - the signal at that point is directly
out of the product detector (in SSB/ISB) and also the AM detector (via just
an emitter follower from the detector diode). Or you could pick up that
same point under the chassis on the module connector.

*Oh wait! - I apologize - I missed the xmtr sidetone connection on the rear
at J4-Y (USB/AM) or J4-X (LSB) - that signal goes to the same point in the
audio chain (through a 15uf cap). It is "intended" to be an input, but
there's no reason you can't use it as an output.*

As Ray says, the mechanical filters in the IF chain will probably be a
limiting factor (although there is some feedback in the audio line drivers
that might further shape their freq response). The AM filter is listed as
FSN 526-9421-00 Collins F 500 Y 70 AM - so 7 kc wide rather than the 8 or
16 in your R-390A. let us know how it works!

Apologies if I am repeating stuff that "everyone knows"- I am new to the
R-1051 and just started to explore the circuitry.

Cheers,
Nick England K4NYW
www.navy-radio.com

On Sun, Nov 9, 2014 at 8:14 AM, Steve Hobensack <stevehobensack at hotmail.com>
wrote:

> Tks Nick
>
> N8YE
>
>
> > From: navy.radio at gmail.com
> > Date: Fri, 7 Nov 2014 21:06:16 -0500
> > To: r-1051 at mailman.qth.net
> > Subject: Re: [R-1051] Back Panel Plug Diagram
> >
> > Sorry, The rear connectors only have 600 ohm audio out from the AF amps.
> If you want something earlier you'll have to run a wire into the IF/AF
> module.
> >
> > Nick
>
>