RE: [Repeater-Builder] Kenwood TKR-820

Tue, 13 Dec 2005 23:49:43 -0800

There is a 9346 eeprom on the signaling board.  Seems like removing this chip will make the radio CS.  Will be glad to pgm tones/dcs if u want to send the chip.  Freq info is contained in a 9346 on the front panel pcb and soldered into place.  If you remove and socket this chip, I can also pgm it in my kpt20 box.  Set VCO’s for 4.0V or as close as u can get, touch up the front end, there are 3 pots for tx deviation, one is max dev – I usually set a 4.0 with a loud voice into the mic, then mic gain for the desk mic, then bal squares up dcs data.  On the sig board I set rept for 2K in / 2K out.  Set hang time for 0, and add a 10mf cap between lead 3 and gnd on the sig bd connector, and this will yield hang time without tone for a quiet turnoff to the mobiles (if you choose to use tone).  Usually set the pot on the tx level control for 20 Watts before duplexer and have not had trouble.  Lemme know if I can be of any further assistance,  Steve NU5D – ps – makes a nice repeater in 70cm fm – just add an ID8 board and go…Also rpt button has to be pressed…..ssb

 

From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of DCFluX
Sent: Wednesday, December 14, 2005 1:12 AM
To: [email protected]
Subject: [Repeater-Builder] Kenwood TKR-820

 

§         Hello All,

I am in the process of brute force hacking a Kenwood TKR-820 into the ham bands. No one seems to be forth coming with a schematic of the KPT-50 so I have a cable ghettoed to the back of this laptop going to the serial eeprom on the front board.

 So far I have been able to program the dual synthisizers to the test frequency of 446.3TX and 441.3RX, simple formula,  Target frequency in Khz (446300) minus 21400 divided by 12.5 then converted to hexidecimal for both synthisizers.
 

 


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