[Premium-Rx] RF-590 VLF sensitivity improvement

[ToddRoberts2001 at aol.com]

For anyone interested the AMRAD LF up-converter article appeared in the April 
2002 issue of QST. If you are an ARRL member you can search the QST archives 
for the article. If you are not able to do that email me and I will send you a 
pdf file of the article. The AMRAD LF converter works very well and is highly 
recommended. I believe FAR circuits still sell a kit of blank circuit boards 
for the project. The converter will allow full sensitivity tuning below 30 KHz 
for the RF-590 and any other good premium receiver that may lack 0-500 KHz 
coverage. 73 Todd WD4NGG