[Milsurplus] [ARC5] Scott SLRM - Low BFO Injection

[Kenneth G. Gordon]

On 11 Sep 2019 at 7:04, David Stinson wrote:

> (very) stray capacitance.  Since this was not intended to be a 
> "communications" receiver, I suppose the tiny BFO signal is intended as 
> part of the "Special Low Radiation" design.

Well, maybe. I view it as an error on the part of Scott: somebody in their organization, 
somewhere, simply missed the proper coupling from the BFO to the detector. Could have 
been a designer, or whoever was the one who decided how the receiver was to be built.

My first BC-779 (NIB, BTW), had very low BFO signal coupling. I thought at first it was 
simply designed that way, so I modified the receiver for a product detector, which very, very 
greatly improved the operation of the receiver.

Years later, I discovered that the originally designed coupling method (can't remember 
exactly what that was) had been inadvertently left out of the receiver when it was built.

Ken W7EKB