[R-390] R-390 digital readout

[Larry H]

Jose, the R390's are dual or triple conversion depending on the received
frequency and therefore are a big challenge for a designer of a digital
readout system.  There is no one point where one composite oscillator
signal could be obtained for what you want.  Someone made one a few years
ago, but have not seen it lately.  You might search the R390 archives for
info.

Regards, Larry

PS:  The subject line of your original post is meaningless - please fix.

On Sat, Apr 13, 2019 at 1:01 AM jm <josemic at gmail.com> wrote:

> Hi fellows
>
> I use a frequency meter with my tube receivers. Every set has its
> peculiarity but until now I have managed with the HQ-180, Transoceanic
> (transistors) and Hallicrafters sx99.
> The trick is to locate the oscillator signal,  offset the IF and the thing
> works.
> But... what about the 390? variable IF, lots of crystals. I have to confess
> that I'm lost.
>
> Is there an easy way to connect the frequency meter in a point in which the
> oscillator signal could be found for all mhz positions?. What  would be the
> IF value  to offset ?
> I know that the challenge in this receiver is to obtain the maximun
> sensitivity and precision via calibration but that's not my league yet and
> meanwhile I think that a good solution is the frequency meter.
>
> Regards and sorry for a beginner's question.
>
> Jose
> EA8DCP
>
>
>