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Remember when fitting / using CTCSS you must enable the HPF filter on the mother board or the sub tone will be sent to the line out, and most Drake / Prospect systems etc. respond very well at low frequencies.

To enable / disable talkthrough / repeater use fit J801, a valid carrier ( with / without ) ctcss depending upon whether the board is fitted will then cause the transmitter to key up and retransmit the audio. Talkthrough audio levels are set by the pot marked repeater level.

 

JPl CONNECTIONS

1GROUND

2 POSITIVE SUPPLY

3 N/C

4 ENCODE O/P

5 DEC OUT (FOR REPEATER)

6 P T T

7 AF LOCK

8 FROM DISC O/P

9 N/C

10 MONITOR

11 N/C

 

EPROM NOTES

IF 2732/2764 IS FITTED SWI - SWS TO BE OFF

ADD 40H TO EPROM CODE TO DISABLE DECODE

ADD 80H TO EPROM CODE TO DISABLE ENCODE

ADD COH TO EPROM CODE TO DISABLE ENCODE AND DECODE

CHAN 1 - EPROM ADDRESS 0,

CHAN 16 - EPROM ADDRESS 0FH ETC

 

 

LINK NOTES

LKI ON DISABLE DECODE FUNCTION

LKI OFF ENABLE DECODE FUNCTION

LK2 ON DISABLE ENCODE FUNCTION

LK2 OFF ENABLE ENCODE FUNCTION

LK3 MEASURE ENCODE FREQUENCY

LK4 ON ENABLE DECODE FUNCTION

LK4 OFF FUNCTION CONTROLLED BY MONITOR SWITCH ON MICROPHONE (MUST BE ON

IF MICROPHONE NOT CONNECTED TO TX)

 

 

CTCSS TONE PROGRAM INPUTS

ON =0 SW6 SW5 SW4 SW3 SW2 SW1 EPROM

OFF = I D5 D4 D3 D2 D1 D0 CODE

67.0 - 1 1 1 1 1 1 - 3F

71.0 - 0 1 1 1 1 1 - 1F

74.4 - 1 1 1 1 1 0 - 3E

77.0 - 0 0 1 1 1 1 - F

79.7 - 1 1 1 1 0 1 - 3D

82.5 - 0 1 1 1 1 0 - 1E

85.4 - 1 1 1 1 0 0 - 3C

88.5 - 0 0 1 1 1 0 - 0E

91.5 - 1 1 1 0 1 1 - 3B

94.8 - 0 1 1 1 0 1 - 1D

97.4 - 1 1 1 0 1 0 - 3A

100.0 - 0 01 1 0 1 - 0D ( do not use , will false with mains hum , 2nd harmonic of 50 Hz )

103.5 - 0 1 1 1 0 0 - 1C

107.2 - 0 0 1 1 0 0 - 0C

110.9 - 0 1 1 0 1 1 - 1B

114.8 - 0 0 1 0 1 1 - 0B

118.8 - 0 1 1 0 1 0 - 1A

123.0 - 0 0 1 0 1 0 - 0A

127.3 - 0 1 1 0 0 1 - 19

131.8 - 0 0 1 0 0 1 - 09

136.5 - 0 1 1 0 0 0 - 18

141.3 - 0 0 1 0 0 0 - 08

146.2 - 0 1 0 1 1 1 - 17

151.4 - 0 0 0 1 1 1 - 07

156.7 - 0 1 0 1 1 0 - 16

162.2 - 0 0 0 1 1 0 - 06

167.9 - 0 1 0 1 0 1 - 15

173.8 - 0 0 0 1 0 1 - 05

179.9 - 0 1 0 1 0 0 - 14

185.2 - 0 0 0 1 0 0 - 04

192.8 - 0 1 0 0 1 1 - 13

203.5 - 0 0 0 0 1 1 - 03

210.7 - 0 1 0 0 1 0 - 12

218.1 - 0 0 0 0 1 0 - 02

225.7 - 0 1 0 0 0 1 - 11

233.5 - 0 0 0 0 0 1 - 01

241.8 - 0 1 0 0 0 0 - 10

250.3 - 0 0 0 0 0 0 - 00

 

 

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Last modified: February 09, 2006