[Kenwood] TS-430S AM RCV

Wed Jan 6 00:12:04 EST 2010

On Tue, Jan 05, 2010 at 10:53:55PM -0600, Idle-Tyme wrote:
> Ok, another weird quirk this rig has,
>> We all know the bad dirty contacts thing with the bandpass filters and 
> all that. Like this rig when you go from 3.999.99 all is well and 
> strong, but cross to the 4.0 to the 6.5 window you hear the relay click 
> in and the receiver is dead. I haven't bothered cleaning it because all 
> that I'm missing in that gap is a few broadcast bands so not a big 
> deal. BUT
>> I also listen to AM broadcast band lot and noticed there is a positive 
> deafening of the AM band. when I'm 500Kc and up it hears and all don't 
> get me wrong, but as you tube below 500Kc the receiver suddenly jumps to 
> life with much stronger signals and noise floor and all is greatly 
> stronger But no relays click, so I'm thinking some software attenuator 
> to help block strong broadcast band sigs?
>> Can this be removed? I don't have any near me. the closest AM station 
> is 10 miles away and is only a local station with qrp power.

I can't say I've observed this problem in my 430, but I understand
there was some purposeful attenuation added to the broadcast band
for whatever reason. (To prevent overload? To prevent birdies?)
You might be interested in the following URL if you feel this is a
problem for you:
http://home.computer.net/~pritch/ts-430.htm
You'll probably be most interested in the 2nd paragraph from the
end of the article. To reiterate, I have not performed this mod,
and I am not making a recommendations in any event.
YMMV,
Rob