In article le.org,
Michael Black wrote:
On Thu, 21 Mar 2013, Brenda Dyer wrote:
"marc" wrote in message ...

Can you listen to a speaker in this BOX ? Do you need a computer for the
processed sound?


http://www.ebay.com/itm/TG37-SSB-BFO...em 2567fc55c1


My best guess is that it outputs a stable carrier wave at the radio's IF
frequency, with the exact output frequency tunable by ~ +/- 3 KHz so that the
proper sideband can be tuned.

....

The other thought I had wsa I think the 450 has an IF output jack? If
that's what the type F connector is, then they may be using the IF out
jack to inject the bfo signal into the receiver. That may not be the best
place to inject it, depending on where that IF out jack is connected, but
it means that one isn't constantly tuning the BFO since it is at the IF
frequency.

Of course, that IF out jack is for connecting some external detector, and
one might as well add a product detector as well as a BFO and then some
audio amplification. Or add a whole synchronous detector.


Somewhere/sometime on this group, somebody posted a RP2100 manual or
a link to it. And I found a copy still kicking around on my disk.

Yes, it has a 450 kHz output jack. Were they thinking ahead for a
DRM (Digital Radio Mondial) adapter?


Mark Zenier
Googleproofaddress(account:mzenier provider:eskimo domain:com)