[R-390]R-390/URR Questions

[Cecil Acuff]

Hi Mike,

        Great news on the R-390.  I have restored two or three but don't own 
one myself.  I hope to at some point.

I have found them easier to work on than the "A" variant and they sound 
nice.

On the dreaded "Green Gear".....I can find no use for it except to keep the 
frequency counter display in sync with the gear train if one was to be 
removing the RF deck to do some minor work on the bottom side and then 
reassemble.  If you are going to disassemble the thing for a good cleaning 
you will probably want to pull the veeder root counter anyway.

The rack handles and the knobs are interchangeable no problem there.

The only site I am aware of on the R-390/URR is the works of Dave Medley. 
www.r-390.com  Be aware that Dave has retired from doing 390 work his works 
are kept alive on the web by others.

Any method of powering the radio that grounds the chassis is 
acceptable....your choice.

Good luck and let us know of any questions or of your progress....

Cecil Acuff



----- Original Message ----- 
From: "Mike Crawford" <mcraw at mashell.com>
To: <R-390 at mailman.qth.net>
Sent: Tuesday, January 24, 2006 6:11 PM
Subject: [R-390]R-390/URR Questions


> Gentlemen,
>
> I am a long time lurker, first time poster. The time has come to pick the 
> collective brain.
>
> I have a R-390/URR which I acquired several years ago but am just getting 
> around to working on. It is in fairly good condition, not pristine by any 
> means, but all of the big pieces seem to be there and no major mouse nests 
> are to be seen.
>
> It is missing 1 small and 1 medium knob along with the rack handles. I see 
> that Fair Radio has these items for the R-390A and was wondering, are they 
> interchangeable?
>
> It also seems to be missing the "green gear". As I am planning on 
> completely tearing down and cleaning the gear train is the green gear 
> necessary at all?
>
> The power cord is missing and I have been studying Roy Morgan's diatribe 
> on power cords and bypassing and am leaning towards replacing the 
> connector/filter with a modern computer connector and line filter. Any 
> comments?
>
> I have copies of a couple of R-390 FAQs and the -10 -20, and -35 TMs. Are 
> there any R-390/URR specific web sites? I have found several for the 
> R-390A/URR, but none for the R-390/URR.
>
> Thanks in advance for any help you might be able to give me.
>
> Mike
>
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