[Hallicrafters] (no subject)

[Julian Bunn]

I picked up a Jung Jin JSG-1000B AM/FM signal generator on Ebay
for $55 recently ... this unit is synthesized digital and has
99 memories in which you can pre-set all the frequencies you like to use
for alignment, and runs up to at least 100MHz from about 400kHz,
with AM or FM modulation (variable depth) using 400Hz or 1kHz
tones. The frequency is spot-on ... down to the fourth decimal
place according to my digital frequency meter. It knocks the
spots off anything else I've got or had (including the B&K E200D,
the HP 608C, the Hickok 288 et cetera). The only thing you
can't easily do is "rock" the output frequency, as you are
often asked to when aligning these old sets :-)

I consider it a real bargain at the price. I notice the same
seller has a couple of similar units on auction right now.

Julian



Bill Gerhold wrote:
> Save your time and get yourself a URM-25D signal generator.  It is perfect
> for Hallicrafters equipment and basically all receiver equipment of that
> era.  It goes from 30khz to 50mhz.  A Navy piece of equipment.  There is an
> outfit in California that upgrades and aligns these units and they sell for
> I believe $ 125.00
> 
> K2WH
> 
> -----Original Message-----
> From: hallicrafters-bounces at mailman.qth.net
> [mailto:hallicrafters-bounces at mailman.qth.net] On Behalf Of Rob Copeland
> Sent: Tuesday, May 23, 2006 1:59 PM
> To: Hallicrafters at mailman.qth.net
> Subject: [Hallicrafters] (no subject)
> 
> 
> 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
> 
> 
> 
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-- 
Julian Bunn
Caltech

Tel: +1 626 395 6681
Mob: +1 626 375 4628
WWW: pcbunn.cacr.caltech.edu/jjb.html