[Premium-Rx] RF-590 VLF sensitivity improvement

[ToddRoberts2001 at aol.com]

In a message dated 2/22/2006 3:52:34 PM Eastern Standard Time, 
n4vic at hotmail.com writes:
John,
Any ideas on improving the sensitivity of the RF-590 for VLF below 30 khz?  I 
have one that I love using but am new to VLF for monitoring.  I've used VLF 
for aeronautical navigation but thats all.  I'm not highly trained technically, 
so something outboard of the receiver would be better for me even if I had to 
build it.  Thanks.
N4VIC
Victor

Victor, I think using a high-quality up-converter in front of the RF-590 
would be the best way to go for full sensitivty reception of VLF below 30KHz.  The 
RF-590 already has outstanding sensitivity at MF-HF. Something that would 
convert 0-500KHz to 4.0-4.5 MHz is nice to have. AMRAD has a good converter 
design that was featured in QST. 73 Todd WD4NGG.