I have a harris ma7300 that I am trying to get audio out of an external speaker. I have tried an adapter via the can connector, but I just get the lost mru. Would something like the control head kit CA-012349-001, allow me to use the connector for the speaker, without having a control head attached to it? The control head is currently on the front of the main unit.
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Harris MA7300/5300 Speaker
- Thread starter KD9FAL
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The speaker does not connect to the CAN port directly or through an adapter. The remote heads have a similar connector to connect them via the jumper. The head has an audio amplifier built in to power the speaker. If you have no remote head you need to use an option cable off the 44-pin on the radio. You can use the full option cable, or the speaker-only option cable, or simply buy a DB-44 connector and make your own.
BMDaug
I am licensed…
Ya, those high density 44pin connectors can be a little tricky to solder and there is at least one pin that has the supply voltage on it when the radio is on. When I make custom cables, after I have everything soldered, I always slip a piece of heat shrink over that hot pin and put a drop of super glue after I shrink it to make sure the heat shrink doesn’t slip off.
The CAN and speaker ports do look similar. They are both Conxall parts, CAN is three pin and speaker is two pin. If you’re using the rig mobile, find an option cable, but if you are using it as a base station, you can get a 44pin screw terminal breakout like the one pictured below… depending on what’s available on the second hand market, it may be much cheaper, but I would never go this route in a vehicle.
-B
The CAN and speaker ports do look similar. They are both Conxall parts, CAN is three pin and speaker is two pin. If you’re using the rig mobile, find an option cable, but if you are using it as a base station, you can get a 44pin screw terminal breakout like the one pictured below… depending on what’s available on the second hand market, it may be much cheaper, but I would never go this route in a vehicle.
-B
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ElroyJetson
Getting tired of all the stupidity.
The M7300 radio unit does not have a speaker connector on it. (Audio is available via two pins in the 44 pin connector.) But the CH721 remote head has a 2 pin round connector for the speaker. It looks like the CAN connector other than having two pins rather than three.
As per the M7300 service manual, the audio pins on the 44 pin connector are:
19 and 20 go to pin 1 of the speaker.
21 and 22 go to pin 2 of the speaker.
As per the M7300 service manual, the audio pins on the 44 pin connector are:
19 and 20 go to pin 1 of the speaker.
21 and 22 go to pin 2 of the speaker.
ElroyJetson
Getting tired of all the stupidity.
My installation is a dual head setup. There is a control head on the M7300 itself, plus a second one connected via the CAN cable. The speaker is thus attached to the second head. Since these heads are PLENTIFUL on ebay for 50 dollars or less, plus a CAN cable and a second DC power cable, it's an easy upgrade. You will also need the speaker with the cable adapter pigtail, and of course, a CAN terminator. And a mounting bracket for the control head, which ironically is the hardest part to find.
The only thing to watch out for is to remember that the radio will be on when EITHER control head is turned on. This can drain your vehicle battery overnight. Since I only use the remote head, I turn the head on the radio unit off and keep it off.
The only thing to watch out for is to remember that the radio will be on when EITHER control head is turned on. This can drain your vehicle battery overnight. Since I only use the remote head, I turn the head on the radio unit off and keep it off.
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