[Milsurplus] need hep on 5 items

[Mike Hanz]

N4TGC Eric wrote:

>I recently acquired four mil-surplus pieces that I could use some
>help i.d'ing, &c.
>	2.  Bendix-made RTA-1B MF/HF rx/tx. This 3105-6500 kc 10-channel
>8x16x20 hulk has a 7x14 turret that can be hand-cranked from a 5x5x6
>"Frequency Shift Unit MS-39B" power-drive box mounted on the front.
>"Suitable for 24v", it has 8 metal octals present in the rx section, and a
>6V6, 6L6, and four 807's missing from the tx. Also missing is T-103, and
>everything on the back shelf, as well as the antenna tuning rollers for
>channels 2,3,4; the meter, handles, and a couple of empty mystery holes.
>What's the story on this unit?  Worth messing with?
>

Depends on your level of patience.  This is a ~1941 design integrated 
transceiver, originally intended for the airlines but used in a few WWII 
Navy aircraft types (and I expect Commonwealth planes as well.)  Puts 
out 50w from 2.5 to 13MHz.  Ahead of its time - similar to the much 
later Collins AN/ARC-2, but used two dynamotors (the Tx dyno may be a 
little hard to find.)  Local control leaves something to be desired, but 
it is certainly a part of the lore of WWII aircraft comms.  Manuals are 
fairly available.  Biggest problem is the drum type channel switching 
design that introduces lots of contacts to corrode.

>4.  "portabale (sic) test oscillator", order no. 9245-WF-43, this
>10x7x7 black-crinkle aluminum box has two Dzus-fastened covers: one over
>the battery compartment, for a 6.3v and two 45 volts; the opposite side,
>over two acorn tubes and a 2x8.5" tuned cavity. 
>

I think Hue nailed it as the ARR-1/ARR-2 test oscillator.

73,
Mike