[Hallicrafters] My First Boat Anchor Restoration: SX101 MkIII

[rbethman]

I agree with your assessment of the GR-1001A, and the good results with 
the AN/URM-25(X).

I ended up with a HP-606B for the price of come and get it.  I also 
obtained an HP-312A from the same source and price.

I only wish it WAS an HP-606A.

I was given mt AN/URM-25 by a brother Warrior/Ham.

I only had to replace one tube.  I've calibrated it against WWV and 
several crystal calibrators.

I gave Jason one piece of advice regarding one that he was looking at on 
Ebay.  When you read the ENTIRE description, it reads the ubiquitous 
"As-Is" thing.

That always makes me VERY nervous!

They are however, very adequate for the job he's looking at.

He has to decide how much use this test equipment will get used.  That 
has a BIG impact on how much someone wants to put in it.

Carl, you and I probably use this stuff MORE than the masses.  This 
could be a one=time thing for Jason, OR very infrequent.

His call!  (Along with whatever his Elmer's have available!)

Bob - N0DGN



On 11/16/2011 8:45 AM, Carl wrote:
> The URM-25D hung from one of my hands for about 3 years as a USN ET and it
> did an excellent job keeping our country safe.
>
> National had the GR 1001A's and they drifted so bad we used discrete crystal
> oscillators to do calibration. The only thing they were good for was IF and
> filter alignment along with general tracking and spot sensitivity tests. The
> coax adaptors can get pretty pricey also and signal leakage can be a problem
> when doing sensitivity measurements on the better receivers.
>
> With the NCX-3/NCX-5 and HRO-500 they were useless.
>
> The HP-606A replaced them and it is still one of the best generators even
> today. I have a pair of them and save the fragile 8640B for other work.
>
> Before getting the 606A's I rebuilt a URM-25D and used that for many years.
> They drift a bit but certainly not as bad as the GR.
>
> A good 25D will run $50-100 unrestored and around $40-75 for a 606A from
> what Ive seen at New England hamfests and several forums. Ebay is usually
> much higher.
>
> Carl
> KM1H
>
>