[Milsurplus] truck load of TU-10-B

Wed, 2 Jul 2003 10:51:03 -0400

These are tuning units for the BC-375 or BC-191 WW II transmitters, for
tuning 10 to 12.5 MHz.  In good shape with the CS-48 case, the various
tuning units  bring from $10 to $25 on eBay or at hamfests.  They set the
frequency of the master oscillator and the PA.  The antenna tuning in these
transmitters is done in the main chassis or for really low frequencies vis
the BC-306 external tuner.  Sounds like an interesting find.  The lower
frequency units were often scrapped for ham antenna tuner projects since
they have larger inductors and variable caps.

73,

Clare  N2RJB

                      aGEnuine Ham                                                                                                        
                      <[email protected]>                                                                                                  
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                      07/02/2003 08:45 AM                                                                                                 

                                              Subject:      [Milsurplus] truck load of TU-10-B                                            

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I pulled the following off the antennas newsgroup, if anyone wants to be
king of the TU-10-B market, contact this guy!

73,
George
W5VPQ

Group,
I found a cargo container of these "OLD" Mil Aircraft antenna tuners.
I bought 3 truck loads of other old tube gear from these folks but
passed on these tuners.
No body knows what they tuned. TRAILING WIRE? I think they are MF/HF.
Inside are 2 vario-ductors or (vario-couplers),
fixed caps, lots of HV ceramic switches. Coils are old cloth litz wire
on bakelite/fiber core forms.
They are extreemly lightweight for their size. Transmitter Tuning Unit
TU-10-B

Can these be used for anything worthwhile or just junk?
Maybe too narrow banded for Amateur use?

Maybe a veteran or aircraft radio buff recognizes these.

Here are 3 of them->
http://pic3.picturetrail.com/VOL18/68355/167687/28486943.jpg

I took a sample unit apart to inspect.
I have to buy the whole container or pass.
They are kind of neat, but that is a lot of tuners to get stuck with.
Even at $2.50 ea prox.

Thanks for reading,
John
www.collectiblehelp.com

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