[R-390] Wullenweber Coupler CU-1280/FRD-10A(V)

[Joe O'Brien]

I have one of these CU-1280's.  Got it -
 oh, 
maybe fifteen or twenty years ago after I saw an ad and an offer 
I could not believe (nor refuse) - in one of the SWL magazines if I 
recall 
correctly (which I don't always do).
 
I have had as many as eight of my 
radios (R390A, 
JRC NRD-505 and '515, various Drakes and others) all hooked up at one 
time, and 
it works like a charm.  Some slight hum I can not get rid of but can 
live 
with.
 
However, I really did not get it for 
hooking up 
radios, but rather to hook up to my own elephant cage, which I am 
still working on.  It is going to take a while, yet.
 
Manuals/schematics are, indeed, hard to
 find if in 
fact there are any out there.  Can anyone help?  I've asked this list 
before...
 
73/Good weekend!
Joe/KG4DVB
 
 
 
 
 
They are probably as rare as the LF Converter for the R-1051's.

I had one of those antenna couplers, ran pretty hot when in use. Got rid of it years ago. Nicely built though.

Keep trying, someday somebody will find one that wasn't burned or shredded.

Les Locklear
Hammarlund HQ-180A
Hammarlund SP-600 Re-Engineered by John R. Leary
Ten Tec RX-350
  ----- Original Message ----- 
  From: Roy Morgan 
  To: R-390 List ; Old Tube Radios 
  Sent: Friday, February 12, 2010 1:50 AM
  Subject: [R-390] Wullenweber Coupler CU-1280/FRD-10A(V)


  Anchorites,

  There have been requests before for information about the receiving  
  antenna coupler used in the "Elephant Cage" Wullenweber direction  
  finding system:

  CU-1280/FRD-10A(V)

  If there are any manuals out there, I'd appreciate hearing about them.

  For pictures of the coupler, and other info about the FRD-10, see:
  http://www.virhistory.com/navy/frd10.htm

  Roy


  Roy Morgan
  k1lky at earthlink.net
  529 Cobb St.
  Groton NY, 13073
  Home: 607-898-3607
  Cell: 301-928-7794