Mike:

What great suggestions!!!!!

I can respond to the first one right off the bat by saying that, at the 
current time, the radio is not connected to the computer in any way.

Tonight yet, if I get time, I'll disconnect the ground from the ground lug 
on the power supply, and see what happens.

Trying your other suggestions will have to wait till next week-end, since 
I'm getting ready to go to a conference, but I will keep them all handy for 
when I need them.

I want to thank everyone for their patience here.  It's been frustrating, to 
say the least, but that's the nature of the beast sometimes as we all know.

73 from Tom behler:  KB8TYJ

----- Original Message ----- 
From: "Mike Duke, K5XU" <[log in to unmask]>
To: "Tom Behler" <[log in to unmask]>
Sent: Sunday, February 27, 2011 8:16 PM
Subject: More 20 Meter RFI


First, i   s the computer connected to the radio?

If so, disconnect it long enough to see what's happening.

Second, John Miller may be correct regarding the extra ground on the
power supply.

Finally, do you have any slack in the feed line to the Alpha Delta
that you can coil up into a coil about 6 or 8 inches in diameter, with
8 or 10 turns?

That's your basic choke ballun.

If you don't have any extra feed line on that antenna, try inserting
the piece that you use to make the Windom happy on 160, and see what
happens. If that clears it up, add one of those line isolators to the
Alpha Delta either just outside the window, or right behind the amp.

The other possibility is that the Windom is actually the culprit. If
the feed line for the Windom is still even partially attached, try
grounding the shack end of that line until you get the windom
repaired. Just short the center of the PL259 over to the shell with a
scrap of wire, and tie the other end of that scrap of wire to your
shack ground.





Mike Duke, K5XU
American Council of Blind Radio Amateurs