REGENCY
model(s) wire color connection
CB-27 Audio Audio
CBM-27-6 Ground Ground
CBM-27-12 N/C N/C
  Common receive
  PTT PTT
(Hi-Z, Use an amplified mic only) receive N/C
model(s) wire color pin number
FORMULA/23 Audio 1
SPRINT/23 Ground 2
  N/C N/C
  Common 3
  PTT 4
  receive N/C
model(s) wire color connection
GT523 Audio Audio
  Ground sheld
  N/C N/C
  Common receive
  PTT PTT
Isolate ground on stand mics receive N/C
model(s) wire color pin number
IMPERIAL (CB-253) Audio 1
IMPERIAL II (CB-254) Ground 4
RANGE GAIN II N/C N/C
ROMPER (A-3) Common 2
  PTT 3
(Hi-Z, Use an amplified mic only) receive N/C
model(s) wire color connection
RANGE GAIN Audio audio
RANGER CB270 Ground ground
  N/C N/C
  Common ground
  PTT relay
(Hi-Z, Use an amplified mic only) receive N/C
model(s) wire color connection
MODEL 500 Audio audio
  Ground ground
  N/C N/C
  Common ground
  PTT 7V
(Hi-Z, Use an amplified mic only) receive speaker
model(s) wire color pin number
CR-142 Audio 1
CR-230 Ground 2
CR-185 N/C N/C
CF-240 Common 2
SPRINT 23 II PTT 4
  receive 3
model(s) wire color connection
CR-123 Audio tip
  Ground case
  N/C N/C
  Common case
  PTT ring
  receive N/C
model(s) wire color connection
CR-186 Audio N/C
  Ground Ground
  N/C N/C
  Common Ground
  PTT PTT
  receive violet
model(s) wire color pin number
CR-501 Audio 4
CR-701 Ground 2
  N/C N/C
  Common 2
  PTT 3
  receive 5