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.
This required a little tweaking of the VCOs to do so, and so far it seems to be working, but I don't have any serious test equipment hooked up to it at the moment.
But I cannot get the unit to go into repeat mode, so I am trying to figure out if I need to program the thing to go with carrier squelch or if it is looking for CTCSS or what. Does anyone have any documentation on this unit at all? Right now I am going by a schematic for the VHF version of the repeater and it isn't really answering too many questions.
I am a little curious as to what the serial EEPROM on the Signal Control Board does. It looks like a rudimentry controller and perhaps houses the PL tone decoder, oh, and the "COR" lamp on it will not light when the RX is unsquelched.
--Matt
YAHOO! GROUPS LINKS
- Visit your group "Repeater-Builder" on the web.
- To unsubscribe from this group, send an email to:
[EMAIL PROTECTED]
- Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
