The 520 is a PEACH of a radio, however, you have discovered it's only
short-coming. I tried to do something similar with mine years ago and
gave up and accepted a weaker receive sensitivity on 15 and 10 Meters.
Wish I could be of more help. Do you have the SERVICE manual for it? I
believe I have one and will take a look and see if I can find any info
for you...

Scott
N0EDV

Andrew VK3BFA wrote:


not pretty....

There MUST be an easier way, or is this just a real pig of a radio....

Andrew VK3BFA.