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

[Jim Sinclair]

Ken
What I have is the APR-1, but there is other WWII aircraft gear I haven't investigated yet. If I find an APR-4 I will let you know. These are not modified and do not appear to be beaten up. 
Jim

Sent from my iPad

On Jun 20, 2013, at 7:32 PM, "J. Forster" <jfor at quikus.com> wrote:

> Ken,
> 
> I am very much interested in a very clean, unmodified, APR-4 and PIs. Most
> all I've seen are beaten up or hammed.
> 
> -John
> 
> =================
> 
> 
>> On 20 Jun 2013 at 14:19, Jim Sinclair wrote:
>> 
>>> Gordon,
>>> I was working in my dad's attic and found a TN-2b/apr-1. He worked on
>>> aircraft radios during WWII . Call was w6fkq. Seems to be intact. Any
>>> interest? Jim Sinclair
>> 
>> Hello, Jim:
>> 
>> Those tuning units will work in several similar receivers.
>> 
>> The RDO is one.
>> 
>> There is some interest in that series of equipment, but not as much as I
>> think
>> there should be.
>> 
>> The receivers were designed specifically to search wide frequency ranges
>> to
>> find the frequencies of enemy equipment, mainly radar.
>> 
>> Most of those TUs are pretty "deaf" in modern terms, but they were
>> designed
>> to look for signals that were very strong anyway, so it didn't matter.
>> 
>> The APR-1 is a simplified airborne version of those search receivers.
>> 
>> The RDO is very large, very heavy, and is meant to be installed on a
>> capital
>> ship.
>> 
>> The TUs (TNs) covered from something like 22 MHz up through at least
>> 10,000 MHz. Maybe even 30,000 MHz. I can't remember. Some, at least, are
>> motor driven.
>> 
>> I have at least 6 different units here, each covering a different
>> frequency
>> range.
>> 
>> I sold a few duplicates to a collector in Australia a few years ago, but
>> that
>> was the only person I have ever run across who was interested, before or
>> since.
>> 
>> He didn't pay much for them, but I was glad to get rid of them at the time
>> to
>> someone who appeared to apprecate them.
>> 
>> Ken W7EKB
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> 
> 
> 
>