[TMC] Rarely seen TMC receiver -- DDRR-10 variant

[G.Lofstead]

Grant,

That is a nice receiver,
I worked on the assembly line aligning that receiver in 1962.  The biggest problems were to get the
proper bandwidth on the IF and to get the front end RF section to track to keep the 
sensitivity up to spec.  Quite a few got through that din not make spec... on sensitivity.  Real close 
but no cigar.  It wa a great receiver and the synthesizer was very stable

Jerry
W3CDE


> From: "Grant Youngman" <nq5t at tx.rr.com>
> Date: 2007/05/20 Sun PM 10:59:48 EST
> To: "'Old Tube Radios'" <boatanchors at theporch.com>, 
> 	<boatanchors at mailman.qth.net>,  <newoldstock at yahoogroups.com>, 
> 	<tmc at mailman.qth.net>
> Subject: [TMC] Rarely seen TMC receiver -- DDRR-10 variant
> 
> There are a few TMC DDRR-10 2-30 Mhz dual diversity receivers out there but
> not many.  Picture and specs at
> http://www.geocities.com/vintagetmc/ddr10-1.html
> 
> I have had one in storage since 1993 after moving from Atlanta to Dallas and
> no longer having a place to put it.  It's the downside of no basements in
> this part of the world and a hamshack on the 2nd floor.  It was in working
> condition prior to that time, with a few things that needed attention, but
> basically working (for example, the synthesizer output stage transistor
> needs to be replaced, and the low order digit in the frequency display of
> one RF deck needs repair).  I cannot guarantee its current operating
> condition, and it is being made available AS-IS only.  It is still
> physically ok, and actually very nice looking.  I've lost the screws that
> mount the rear cabinet door, but have the door.  It's complete with 2
> complete manual sets, all extender cards, some original spares, and even the
> original drop-light in the cabinet.  
> 
> This is solid state (70's vintage), but one would have to admit it's
> something of a boatanchor :)
> 
> The particular version of the receiver I have is a Navy AN/URR-64(V).  It
> has two receivers (2 RF decks, 2 IF/audio decks) and one synthesiser deck
> which can be used to feed none, one, or both receivers.  By contrast, the
> FRR-85(V) pictured in the link above has 2 synthesizer units.
> 
> I will have some pictures of the rack and modules the week before Ham-Com in
> Dallas (Plano) and the radio will be available FOR PICKUP ONLY near DFW
> after Ham-Com (very late Saturday 6/9 or after).  It consists of a 6' rack
> and 5 modules.  Large and very heavy.
> 
> If anyone has a serious interest let me know and I'll send photos when
> they're available the week of June 4.  This receiver does not have a belt
> clip :)
> 
> Grant/NQ5T
> 
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