[Milsurplus] Mil receivers.

[Kenneth G. Gordon]

On 27 Jan 2016 at 20:49, Hubert Miller wrote:

>   By "shape", do you mean the narrow-deep format?

Well, not so much that, as that odd rear end with the shelf and the "box" on 
one side. It looks kinda like it was "kludged" on as an after-thought. The 
"narrow-deep" is OK with me.

>  Well, that was not 
> odd, but the best way to use limited space.

Yes.

> I do like the appearance of this radio. The BC-652 looks have some 
> similarity. The 12K8 is no winner of a mixer tube
> tho, at the 20 MHz up region.

The 6/12K8 is one of the noisest mixer tubes ever used. I don't really know 
of a worse one, in fact. ENR is something like 250K ohms, maybe more. A 
good low-noise mixer has an ENR (Equivalent Noise Resistance) of under 
1K.

> Which was probably never used anyway for 
> aircraft communications - by the time of
> the GO-9, the high end of operability was 18 MHz.

Yes, which is why the Navy's insistence on having receivers able to tune up 
to 27 MHz always puzzled me.

Ken W7EKB