[Hallicrafters] (no subject)

[Jim Brannigan]

Rob etal,
That query certainly got the juices flowing!
The URM-25's and the like are good generators, but are heavy, bulky, prone 
to drift and are at an age where they need as much TLC as the BA's they are 
used to service.

Your idea is a good one, but you need to consider some of the attributes of 
an RF generator that make it a great Signal generator:

The box must be extremely well shielded (double or triple). There can be 
only one outlet for the RF, the end of the coax.
The signal needs to be a clean sine wave with minimum harmonics.
The output must be adjustable, down to a level less than the sensitivity of 
the best receiver.

Jim



>
> Hi All,
>
> I have scoured the Internet and noticed that modern signal generators are
> extremely pricey. I have also noticed that most of them are not designed
> specifically for shortwave use. So I am wondering if it would be benefical
> start a open source project to build a modern RF signal generator that is
> affordable and specifically designed for SW use. Anyway, I am thinking 
> this
> processor:
> http://www.analog.com/en/prod/0%2C2877%2CAD9854%2C00.html
>
> would be great for this purpose. Someone has designed a RF signal 
> generator
> using this processor you can see their project here:
> http://www.inthelight.co.nz/electronics/dds.htm
>
> It is fairly simple although I think it could be better. With a built in
> Freq Counter, maybe a 100kc Freq. Sweep with variable speed.
>
> Thoughts...????
>
> Rob