[Milsurplus] U.S. Army TRF LF receiver 1934

[Bill Cromwell]

Hi,

I have a RAK (I've been unable to find a RAL within my reach). I am 
unable to hear the oscillating detector in a superhet located inches 
away even the the antennas connected or with a wire poked into one of 
the cabinet openings. The same applies to an LM. I cannot detect the 
oscillating detector in the RAK. The RAK *CAN* easily detect either the 
LM or the BFO in the superhet. The superhet VFO does not tune down into 
the RAK's tuning range.

Maybe I'll find a RAL at a local hamfest before I join the other silent 
keys. Meanwhile the impetus to downsize is gaining here.

73,

Bill  KU8H

On 11/10/2015 03:58 PM, Richard wrote:
> Yes. I have two RAL's, and when connected back-to-back, antenna input 
> to antenna input, I cannot hear one oscillating in the other, even at 
> 23 Mcs.
>
> Richard, AA1P
>
> The Navy specified a very low radiation level at the antenna, 
> something like a few micro-micro-watts of radiation at the antenna 
> connection, and the TRFs that the Navy used all met that 
> specification. National had to add a second RF amp stage to one of 
> their superhets before the Navy would accept it for use on ships. In 
> fact, from my reading, many of the old Navy radio ops preferred the 
> RAK/RAL over the newer RBB/RBC since they insisted that the earlier 
> receivers were less susceptible to overload by nearby transmitters due 
> to their more extensive shielding. Ken W7EKB 
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