I have replaced the AM/FM Pioneer radio in my Coachman with a similar Pioneer unit that also gives DAB reception. I’ve included a VisionPlus diplexer to feed the separate FM/AM and DAB antenna sockets in the radio unit. I’m delighted with the performance of the new radio.
The only downside is that when the 12v supply to the radio is cut off as it is when the caravan battery is disconnected either by the main switch on the caravan control panel or when the caravan’s habitation relay activates whilst towing, the radio “forgets” everything – not only the radio stations tuned in (which are relatively easy to retune) but also other settings for the display, type of antenna, etc, which are much more fiddly to reset.
Ignoring the speaker connections at the back of the radio, the 12v connections are as follows
Black – 12v neg
Red - 12v pos – the “main” power supply to the radio to enable it to work (in a car this would become live when the ignition is switched on)
Yellow - 12v pos – a permanent supply to the radio to keep the radio memory active
Any suggestions as to how I could maintain 12v through the yellow wire to save the contents of the radio’s memory?
I imagine that the current carried by the yellow wire is in the order of milli-amps, although I haven’t measured it yet.
Perhaps a 9v PP3 battery may be sufficient to maintain the memory but would need some sort of blocking diode to prevent the 12v supply attempting to recharge it.
Has anyone out there got a solution?
Mike
The only downside is that when the 12v supply to the radio is cut off as it is when the caravan battery is disconnected either by the main switch on the caravan control panel or when the caravan’s habitation relay activates whilst towing, the radio “forgets” everything – not only the radio stations tuned in (which are relatively easy to retune) but also other settings for the display, type of antenna, etc, which are much more fiddly to reset.
Ignoring the speaker connections at the back of the radio, the 12v connections are as follows
Black – 12v neg
Red - 12v pos – the “main” power supply to the radio to enable it to work (in a car this would become live when the ignition is switched on)
Yellow - 12v pos – a permanent supply to the radio to keep the radio memory active
Any suggestions as to how I could maintain 12v through the yellow wire to save the contents of the radio’s memory?
I imagine that the current carried by the yellow wire is in the order of milli-amps, although I haven’t measured it yet.
Perhaps a 9v PP3 battery may be sufficient to maintain the memory but would need some sort of blocking diode to prevent the 12v supply attempting to recharge it.
Has anyone out there got a solution?
Mike