[ARC5] TN 1B/APR-1 and TN 2B/APR-1 Military Radio Tuners

[Kenneth G. Gordon]

On 23 Mar 2011 at 2:52, Roy Morgan wrote:

> > I just picked up the subject military radio tuners (1 ea.) that use 
> > acorn tubes.   Does anyone out there need these?  They are in pretty
> >  good condition.

Those units were used in at least three different pieces of equipment, all of 
which were search receivers for a very wide frequency range to detect radar 
sets of the enemy.

The Navy had a very large such unit (I have forgotten the Rxx number), built 
by Scott, of which I have two examples.

There were also at least two airborne versions, the APR-1 being one of 
those.

These tuning units will work in all of the above receivers.

I have at least one of each of the tuning units, some NIB, that tune from 
about 20 Mhz through at least 1000 Mhz. I don't remember the upper limits 
for sure, although I think it MAY have been as high as 10,000 Mhz.

The UHF versions used diode mixers and no RF amp.

Some were motor tuned.

They are all beautifully built.

Ken W7EKB