[R-390] Heat Death -JX-28, Leary

[Les Locklear]

I have a Pdf copy (6 pages) of the JX-28/R-620/FRR if anybody is interested. 
Not much information.

Les

-----Original Message----- 
From: Al Parker
Sent: Tuesday, December 04, 2012 6:11 PM
To: Les Locklear
Cc: Todd, KA1KAQ ; R-390-List
Subject: Re: [R-390] Heat Death -JX-28, Leary

Hi Les, et al,
I just sent Dave some info and a link to my JX-28/R-620/FRR, I know
you've seen it before:
<http://www.boatanchors.org/SP-600-JX-28.htm>
   it's pretty grubby looking there, it's getting better, slowly.
Todd knows I have it, too.
BTW, my Leary is very stable after 5-10 min. warmup.  Easy to listen to
a SSB net on 20m for an hour with rarely touching it.
<http://www.boatanchors.org/LearySP-600.htm>
73,

Al, W8UT
www.boatanchors.org
www.hammarlund.info

"There is nothing -- absolutely nothing -- half so much
worth doing as simply messing about in boats"
Ratty, to Mole

On 12/4/2012 5:27 PM, Les Locklear wrote:
> Well, the JX-28/R-620/FRR is quite rare. 100 built. Obviously a purpose 
> built receiver for the Signal Corps on this contract, Order No. 
> 25693-Phila-53 . Only reference to it in manuals is an addendum to the TM 
> 11-851 dated October, 1953. George has the feelers out on it, we talked 
> about it, I know of two of them.
>
> Interesting, that John Leary also used dual voltage regulators on most of 
> his re-engineered SP-600’s. Very stable receivers.
>
> Les
>
> From: Todd, KA1KAQ
> Sent: Tuesday, December 04, 2012 3:18 PM
> To: Les Locklear
> Cc: R-390-List
> Subject: Re: [R-390] Heat Death
>
> On Mon, Dec 3, 2012 at 9:59 PM, Les Locklear <leslocklear at hotmail.com> 
> wrote:
>
>    The original tube for the FCU (frequency control unit) was a metal 
> tube, a 6AC7, later versions used a 6AH6 7 pin miniature glass tube.
>
>
> Ah, I see. Learn somethin' new every day! Of course, unlike you 
> upper-crust SWLs who have seen and used at least one of everything, I've 
> never seen anything that....new, which seems odd to be saying about old 
> tube gear. I figured it might be one of the sub-contractor deals like 
> Northern Radio or such. Clearly I need to get out more!
>
> Now, if I can just get some dial time on that Leary you've got squirreled 
> away down there professor, I can die a happy man. (o:
>
> de Todd/'Boomer'  KA1KAQ/4  (No kielbasa or lutefisk here)
>
> BTW, George is looking for a -620 if you stumble onto a pallet load 
> somewhere. He wanted my -320 but I declined.
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