In response to Andy's post,
This is perfect timing from the ss-64 post. I have a mastr II that I
want to hook up a tone decoder to. I have a encoder board already
and would like to hook in a separate decode board I dug up. Does
anybody have the connection points to hook into? By, the way it is a
Mastr II Station repeater. Thanks for the help.
Andy KC2GOW
The SS-64 wants to be connected to 12 VDC (RED and BLK wires) and
the audio out YEL (Yellow) wire wants to connect to the CG HI input
on the exciter. Pin 2 on the exciter board.
If you want the CTCSS tone to run all the time when the transmitter
is keyed, then nothing more needs to be done, except set the tone
level, either at small pot on the SS-4, or at the exciter pot for
CTCSS. Level should be about .4 kHz (400 Hz).
If you want to CTCSS tone to drop off when the repeater receiver or
link drops off, then you must de-solder JP-1 on the back of the SS-
64, and hook up the ORG (Orange) wire to an "Active Low" source,
from your receiver, either the COS, or the CTCSS Decode line. If
the keying line does not go "Active Low" but goes "Active High,"
then you need to build a simple transistor inverter circuit to take
the "Active High" and convert it to an "Active Low" as the SS-64
wants a pull to ground to activate the CTCSS tone (and take a way
the ground to make it go away when you stop receiving on the
receiver or link). If you want to key the CTCSS tone with more than
one receiver, you need to use steering diodes in this ORG keying
line.
This set up is especially nice for IRLP links, where you don't want
to tie up another link radio, but simply use the repeater as the
link. It has worked very well for me in several installations.
As for the CTCSS decoder board, I usually pick off discriminator
audio at the high-side of the squelch pot, the GRN (Green) wire on a
TS-64DS. You can make the TS-64DS CTCSS Detect WHT (White) wire go
either "Active High" by doing nothing further, or "Active Low" by
putting a solder bridge across JP-7. Remember to be sure to ground
the "Hang-up/busy" VIO (Violet color) wire, or the decode function
will not work.
You can also use the TS-64 to encode the same tone as it decodes.
Simply hook up the YEL (Yellow) wire to the CG HI input of the
exciter.
Good luck.
Shorty, K6JSI
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