[Milsurplus] URM-25D...

[Kenneth G. Gordon]

> Ken:
> 
> How are you connecting the counter?

Through coax and bnc connectors to the 200X jack.

>  If you are trying to measure
> ultimate sensitivity with the counter connected, forget it.

OK. Makes sense.

> 
> On the other hand, if the URM-25 case hasn't been boogered, you are using
> RG-223, 142 or other equivalent double shielded coax,

Not. Obviously should.

> with the connectors
> properly installed, and the receiver is fully buttoned up in its case,

Wasn't, but I'll try that.

> then you should get accurate measurements.  A good test is to simply move
> things around in relation to each other, and see if the output indicator
> on the receiver changes.  That will tell you if there is a direct path
> other than the coax which is confusing the readings.

Good ideas. Thanks! 

This "ultimate sensitivity" business has almost as many variables as 
sweeping the IF...

Ken W7EKB