Pete KE9OA wrote:
I did repair a Kenwood R-2000 a
few years ago, and wondered if it had some sort of attenuation below 1.5MHz.
I noticed this same characteristic with a Kenwood R-5000 and an AOR-3030.

Kenwood units often have extra anttenuation below the 160 meter ham
band to prevent strong broadcast stations from overloading the front ends.

On units sold in the U.S., they often increased it without documenting it.
As an example, my TS-430 had a 220 ohm resistor instead of the (what I
remember as) an 80 ohm one. I replaced it with a 22 ohm resistor from a
"mod" I found and it helped.

My R-5000 also benefitted from a similar "fix".

When I did live in the U.S. (Philly) I was less than five miles from several
AM broadcast transmitters and needed it. Here in Jerusalem, it's the other
way around. Without the mod, the best I could ever get from an AM
broadcast station was S9.

Geoff.
--
Geoffrey S. Mendelson, Jerusalem, Israel N3OWJ/4X1GM
IL Voice: (07)-7424-1667 IL Fax: 972-2-648-1443 U.S. Voice: 1-215-821-1838
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