[R-390] Re: R-390 Digest, Vol 46, Issue 26

[Bill Beech (NJ7P)]

Guys,

We did not replace the R-390A's at Field Station Korea until the 
1980's.  The WJ receivers they replaced them with had a keypad, but no 
tuning knob.  Those lasted about 6 months before a WJ with a tuning knob 
appeared in the 05H racks.

Odd to modify an R-390 for autotune externally when there were so many 
R-391's built and used in army receiver sites throughout the world.  
Probably navy as well.  I used to own 8 of them, but they chewed up too 
much power, so I am down to one.  But then I suspect some computer or 
digital control system drove the "autotune".  I like the Collins version....

Bill, NJ7P
Ex 98G4LKP/CM
> Message: 2
> Date: Mon, 25 Feb 2008 20:30:58 -0500
> From: "Richard Spargur" <k3ui at comcast.net>
> Subject: [R-390] RE: R-390 Digest, Vol 46, Issue 25
> To: <r-390 at mailman.qth.net>
> Message-ID: <C489B014B51942F184EFE2919092693D at unk1>
> Content-Type: text/plain;	charset="us-ascii"
>
> "Old R-390 Receivers," so, can we assume that no R-390A's were left there?
>
> "Old" meaning they wouldn't work anymore? The Government is the biggest 
> waster of tax payer dollars, including the military and civilian branches.
>
> Just being a curmudgeon.
>
> Les Locklear
> Professional Curmudgeon
> Equal Opportunity Annoyer
>
> Don't assume that.  All, but three were R-390As.  Three R-390s were there,
> but they were modified to work in an odd system called AUTOTUNE,
> AN/TRD-1465/URR, if there any 05 Duffies out there.  What is was used for I
> won't explain, how it was tuned was a hoot.  As the only person there 1972 -
> 1973 to repair the system.  The Kilocycle and Megacycle change knobs were
> removed and replaced with gears.  A belt, one that looked like a fanbelt
> from a 1956 Chevy connected the KC and MC change to servo motors.  The
> receiver was tuned from...somewhere else.  I don't remember, the AUTOTUNE
> may have been deinstalled the year before the station closed.  Can you
> emagine all of a sudden the KC shaft would start turning about 30 RPM.  The
> MC would, of course, be less intersting.  After awhile the gears would start
> leaving brass schaving in the bottom of the rack.  Time to order new gears.
>
> Richard Spargur
>
>
>
> ------------------------------
>
> Message: 3
> Date: Mon, 25 Feb 2008 21:08:31 EST
> From: DJED1 at aol.com
> Subject: Re: [R-390] RE: R-390 Digest, Vol 46, Issue 25
> To: k3ui at comcast.net, r-390 at mailman.qth.net
> Message-ID: <c73.28804892.34f4ce9f at aol.com>
> Content-Type: text/plain; charset="US-ASCII"
>
> Hi Rich- I wondered if I would turn up someone with some actual experience  
> from that time and place.  I'm guessing the autotune R-390s were used for  DF 
> purposes.  Were they making a transition to solid-state radios in the  early 
> '70s, or was the site still well endowed with  R-390s?
> Ed
>
>
>
>
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>
>   
>