View Full Version : Yaesu FT-230R PL Tone Connection CTCSS?
03-15-2009, 06:46 PM
Can anyone suggest where I can inject a CTCSS PL tone into my Yaesu FT-230R mobile transceiver? Thanks much!
The instruction sheet for the Com-Spec model TS32 shows where the hookups are.
FT-230R Instruction Manual (Adobe Acrobat)
This radio originally had a CTCSS encoder/decoder and encoder option (FTS-32; FTS32E)
The ComSpec FAX on Demand service will have the step by step,
FAX document number: 4640 SS-32PA FT-230R
I think your radio header is P8.
Otherwise you really need the schematic or service manual for your radio.
Schematic is on the LAST page of the manual above.
The ComSpec SS-64 Instructions are specific
CTCSS OUTPUT (YELLOW on SS-64/WHITE on TE-32) (PIN 3)
This output generates the CTCSS encode tone.
The most common place to connect this line is just prior to the modulation stage in the transmitter.
Typical connections would be to the center of the deviation pot. to the varactor diode in the modulator circuit, or to the manufacturer’s suggested connection point. This connection point can vary from radio to radio.
Do NOT connect the CTCSS Output to the microphone input as the microphone audio stages will distort and attenuate the CTCSS signal.
Since the CTCSS Output on the SS-64 is low impedance, you may have to install a series resistor to reduce the loading effects of the CTCSS Output depending on the interface impedance. This is evident in the case of connecting to the center of a 10K deviation pot. In this case, a 10K series resistor will compensate for the impedance difference.
In addition, a slight adjustment of the voice deviation may be required to compensate for the CTCSS Output circuit loading.
03-16-2009, 12:57 PM