[MRCA] RF Generator wanted

[Scott Johnson]

My choice, for the last thirty years, is the HP 8640B.  I believe it to be
among the best generators for receiver measurement and alignment.  The only
problem is the nylon gears, which tend to shrink and crack from the brass
hubs.  There are people making and selling gears, and even at $300 for a set
that, it is still worth owning one.

Options include a doubler to 1024 MHz, reverse power protection
(recommended),and variable frequency modulation.  The Military version in
the yellow case is to be avoided in my opinion, as it lacks phase locking
and is generally a pain in the keister, unless you (like me) collect such
things.

Scott V. Johnson W7SVJ

5111 E. Sharon Dr.

Scottsdale, AZ 85254-3636

H (602) 953-5779

C (480) 550-2358

 <mailto:scottjohnson1 at cox.net> scottjohnson1 at cox.net

 <mailto:scott.johnson at ieee.org> scott.johnson at ieee.org

 

From: mrca-bounces at mailman.qth.net <mrca-bounces at mailman.qth.net> On Behalf
Of Ray Fantini
Sent: Thursday, March 19, 2020 8:04 AM
To: milsurplus at mailman.qth.net; MMRCG at groups.io; Mrca Mailing List
<MRCA at mailman.qth.net>
Subject: [MRCA] RF Generator wanted

 

Everything old is new again! Been working a lot with repairing a lot of
GRC-106 receiver exciters and noticed that my Motorola Communications
Service Monitor produces a lot of phase noise and poor-quality AM on the HF
bands. Decided that what I need is something like an old school URM-25 or
maybe if I can find one a URM-144/SG-823 being I already have a SG-376 that
I got last year that I have been using a lot for SSB work. 

As always not looking to spend a bunch of money on this but can always do a
trade. Lot of crazy prices for URM-25 generators on eBay but use to seeing
them at Hamfest for $20 to $50 price range. Did not realize until recently
that you more often than not need vintage test equipment for working on
vintage radios.

It's amazing what happens when you take modern items like the new generation
of digital scopes today and look at things like modulation levels for AM
carriers! Or operate DVM in high RF environments.

 

Ray F/KA3EKH

 

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