In article ,
Pete KE9OA wrote:

"Mark Zenier" wrote in message
There's a ton of diodes in the front end (it uses diode switched
bandpass filters), so if you put too much antenna on it, it's
prone to amazing amounts of intermod from nearby medium wave stations.
I found that 200 feet was too much, as I'm 5 miles from Seattle's
medium wave farm on Vashon Island. About 60 feet seems ok.

You should be able to change the front end switching diodes to PIN diodes. A
1N5767 should do the trick. Make sure that they are biased up to at least
15mA.

They're now 1S1587, according to the schematic. I'll have to google and
see what that is.

Mark Zenier Washington State resident