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COR / CAS signal in FTL-1011?
Posted: Sun Aug 16, 2009 7:25 pm
by mpoulton
I am desperately searching for a COR signal in an FTL-1011h, and can't find anything that will work. I know there's that one pin on the header that passes through to the RF board, but that signal operates on squelch only and ignores CTCSS. I need CTCSS to activate the repeater. I can't figure out how this radio is decoding the CTCSS tone and un-muting the audio! Every signal I can find in the thing that changes state during receive seems to ignore CTCSS. Anyone know?
Re: COR / CAS signal in FTL-1011?
Posted: Sat Aug 22, 2009 9:11 pm
by mike m
Remove the audio board, the Printed circuit board on the top side of the radio.
On the bottom of this board look for a 24 pin surface mount IC with markings similar to AK2343.
The dot is pin 1 and you need to find PIN 14 which is tone detect output, this pin goes low when a valid receive signal with proper CTCSS tone is present.
24----------------14 13
pin, #14, is rx tone detect active low.
1-----------------11 12
Mike
WB8VLC/7
.
Re: COR / CAS signal in FTL-1011?
Posted: Mon Dec 27, 2010 9:32 am
by N3CHU
Mike I have opened two different FTLs one UHF and one lowband and both under the top audio board I found four 14 pin ICs and they were all labeled the same. "2902 JRC A3579" so could you please give me a more presice location on the board as these are probably the IC you refered to.thank you very much. Davie n-3-c-h-u at atlanticbb dot net