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TK 790 Squelch Tuning

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lrcrabtree

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Sep 15, 2012
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Location
Paige, TX
We have several TK 790s. Some are 45W and some are 110W; some are the CA Fire Service model and a few are the generic Kenwood model. On one of the 110W generic Kenwood models (160 channel) I15 cannot get the squelch adjusted. The radio opens up with squelch noise even when there is no signal (of course); but then it has to be adjusted up to the highest setting (15). Even that won't quiet the squelch at times. Switching channels will silence the squelch, but the same thing reoccurs within a few seconds, or as soon as a signal is received (after the signal ceases, the squelch continues to make noise).

In the computer program for this radio, I have tried the Program => Test Mode to adjust the Tuning Data. I copied down the Tuning Data from a reliable model (110W California Fire Service model) and then entered that same data into the 'bad' radio; however the Sensitivity settings don't take. I make the changes on the computer screen, but as soon as I move to a different tab or close and reopen that option, the selection that I entered is gone and a much higher value has taken its place. The Help screen says the Default is the Last Entered Value, however I can't seem to get the radio to keep the Last Entered Value. In the Sensitivity settings I am trying to enter these values (from the 'good' radio): Test 54; Low 84; Center 54; High 53.

Any ideas will be welcome as I've just about exhausted my knowledge.

Thanks,

Larry
KJ6QVI
 

buddrousa

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Jan 5, 2003
Messages
8,920
Location
NW Tenn
Have theses radios been programmed at setup by kenwood trained service techs? These are not scanners that can be programmed and left alone they have to be setup with test equipment so they operate as designed. In the kenwood service manual it states the proper programming and setup.
 

ramal121

Lots and lots of watts
Joined
Dec 5, 2008
Messages
1,789
Location
Sonoma, CA
Ooh! Ooh! Do not, I repeat do not try to correct squelch problems with the sensitivity setting in tuning. Without the proper test gear and following the service manual, you can fubar the receiver toot sweet. What you want to be looking at is the squelch open and squelch tight adjustments.

Sent from my HTC6535LVW using Tapatalk
 

cmdrwill

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Mar 30, 2005
Messages
3,969
Location
So Cali
And each radio can be different, so 'jamming in' tuning values' from a different radio IS a BIG NO NO....
ramal121 IS correct, you can fubar your radio.
 
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