[Hallicrafters] (no subject)

[Rob Copeland]

I am a web developer/ electronics tinkerer and I am willing to donate some
of my time to this project. If there really is a need and there are people
interested. I am looking to create a modern version of an RF Signal
Generator that is designed to go down to 10Kc and up to at least 100Mc,
AM/FM with modulation and xtal ouput, built in Freq counter, super stable
digital output with automated freq sweep with adjustable ratio and speed,
all the features that someone would need to work on old radios as well as
new ones in the ham world.
 The processor I am proposing is here:
> http://www.analog.com/en/prod/0%2C2877%2CAD9854%2C00.html
>
> Someone has already designed a RF signal
> generator using this processor and you can see their project here:
> http://www.inthelight.co.nz/electronics/dds.htm

Any Takers? :)

Rob
-----Original Message-----
From: hallicrafters-bounces at mailman.qth.net
[mailto:hallicrafters-bounces at mailman.qth.net]On Behalf Of Jim Brannigan
Sent: Tuesday, May 23, 2006 1:45 PM
To: Rob Copeland; Hallicrafters at mailman.qth.net
Subject: Re: [Hallicrafters] (no subject)


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

______________________________________________________________
Hallicrafters mailing list
Home: http://mailman.qth.net/mailman/listinfo/hallicrafters
Help: http://mailman.qth.net/mmfaq.html
Post: mailto:Hallicrafters at mailman.qth.net
----
List Administrator: Duane Fischer, W8DBF **for assistance**
dfischer at usol.com
----
Hallicrafters Collectors International: http://www.w9wze.org