Radio problems

Hi guys I'm sure this has been covered a few times already but I couldn't find anything on the search. Anyway I am trying to get an aftermarket radio to work in my 1990 GQ patrol I have "T" into both the battery and acc cables beside the factory convertor on passengers side panel and ran 2 cables into my own 24v-12v converter but the problem is that when I connect it up it works but as soon as its put under load e.g. listen to the radio or plug in my phone to listen to music it just turns on and off all the time and its driving me crazy! The annoying thing is I'm an electrician and I can't get this to work! Any help would be greatly appreciated

Can the converter handle the load of the radio?

Where does the 24v come into it?
Not seen 1 with a 24v step down at all, have you tried a direct power feed with fuse to see if it is the convertor?

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Originally Posted by oncedisturbed

Where does the 24v come into it?

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Aren't some of the earlier GQ's natively 24V? I remember workmates GQ long ago, was 24V all around and adding accessories was a pita. Also Graham's shorty from 4wd action is 24V if i'm not mistaken? Sorry if that's not what you were asking mate. lol

It's a 20A converter that I am using and it is outputting 12v which it is supposed to do I just can't figure out why it won't hold it just switches on and off constantly

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Originally Posted by Hodge

Aren't some of the earlier GQ's natively 24V? I remember workmates GQ long ago, was 24V all around and adding accessories was a pita. Also Graham's shorty from 4wd action is 24V if i'm not mistaken? Sorry if that's not what you were asking mate. lol

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Japanese imports (Safaris) are 24V.

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Originally Posted by Winnie

Japanese imports (Safaris) are 24V.

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It's a Jap Safari that I have

Put a small capacitor bank on your power wire with largest fuse rating. Some brands use acc some use constant as main supply. If your radio is a true high watt rms MOSFET unit like pioneers and alpines it could easy draw 20 amps on loud bass notes if you have large speakers(voice coils) . This will make your output clip as unit is trying to draw more than is available.. A capacitor bank will discharge and charge in nano seconds and greatly reduce load on convertor..
Hope this helps

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Originally Posted by tiny

Put a small capacitor bank on your power wire with largest fuse rating. Some brands use acc some use constant as main supply. If your radio is a true high watt rms MOSFET unit like pioneers and alpines it could easy draw 20 amps on loud bass notes if you have large speakers(voice coils) . This will make your output clip as unit is trying to draw more than is available.. A capacitor bank will discharge and charge in nano seconds and greatly reduce load on convertor..
Hope this helps

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I'm only running 4 basic speakers off of it do you think that could draw 20A? What size of capacitor do you recommend?

470uf caps x 6 parallel is plenty.. Cost you less than 10 bucks from jaycar..