[R-390] Input impedance of R390A

[James A. (Andy) Moorer]

I posted on my website (with permission) Dallas Lankford's dissertation on
noise and sensitivity of the R-390A which includes an excellent discussion
on the input impedance of the receiver. Tune your browser to here:

http://www.jamminpower.com/jam/main/noise.jsp

and scroll down to the bottom half of the page. Enjoy!


-- 
www.jamminpower.com
James A. (Andy) Moorer








on 9/3/02 6:52 PM, Tom Warren at wwarren1@nc.rr.com wrote:

> Has anyone actually measured the input impedance at the balanced feedline
> connector of the R390A?  Yes, I know they specify 125 ohms as the working
> impedance for the antenna/feedline, but that doesn't mean that the actual
> input impedance looking into that port is 125 ohms.  I'm pretty sure they
> don't specify a conjugate match (then meaning that the input impedance is
> 125 ohms).  So the question stands, has anyone measured the input impedance
> at a number (even one) frequencies.
> 
> Curiosity still gets to this cat!!
> 
> Tom, W4PG