The Best Technical Reference for the R390A/URR free PDF

Yeah, Transmaster, it was an NTIS librarian lady that I was corresponding with back in the early eighties. I had already been ordering from them. Given that it was a new publication at that time I figured that it would be hard to obtain. Also, after a period of time and no manuals arriving, I began to think that there was maybe some hanky panky going on, especially after I received the bill for $250. But they are beautiful, fresh, original manuals which I still have and are worth it to me. Covers are heavy blue colored plastic.

By the way, if memory serves, those destroyers were built in a Mississippi shipyard.
 
I just picked up some vintage military gear from a neighbor that recently passed away. here is one.
 

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Just a picture of that black tag on top.. Should say the model number and what it is.
 
The installed tuner unit determines this receivers frequency range. The receiver ultimantly has a tuning range of 40 to 3400 MC (MHz). If I read the dial on the installed tuning unit you have Tuning unit TN-1B; 40 to 105 MC.

Oh goodie you have the remote units, and extra tuner modules, for the operation of the Naval transmitters. Suprisingly one of the most valuable things you have is the "dog bone" interconnects, not many have survived. The tube compliment is common easy and to get.

rdo-01.JPG
 
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This receiver would be an interesting restoration project. The best place to go for information, and help in it's restoration is the Military Radio Collector Association (MRCA). Should you wish to sell it this would be a good place to go as there are collectors there who specialize in US Navy radio equipment. http://www.mrca.ar88.net/
here is their mail reflector. Their mail reflector is rather primative but it works. http://mailman.qth.net/mailman/listinfo/mrca

manual
http://www.mediafire.com/file/ncxupn9c7m9eswj/RDO+Manual.pdf
 
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Transmaster, can you tell me what the HP 400R is? I really don't know anything about this stuff. i got if from a neighbors estate when he passed a few months ago.

Here is a lot of the stuff I got.20180414_182044.jpg 20180414_182049.jpg
 
Oh man, the Holy Grail of radio receivers. As an ET in the Navy back in the 70s, I used and worked on the R390 and respect their capabilities a great deal. We had one in our Comm office that we would listen to after hours and, wow, there was little that wouldn't pick up. Back when I was working and could afford it, I tried to buy one off ebay and I lost the bidding war by a few $.

I have a nice Grundig and it's a very fine receiver but can barely touch the capabilities of the 390.

If I won the big lottery I would gladly pay $30K for one. Alas, these days as a retired technician whose pension got swallowed during the Bush depression, I can only afford to look at pictures.
 
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