Customs Running a 6volt Positive ground radio on 6 volt negative ground.

Ok this one has stumped me for a while. Looking for info for a question in another thread I found a Voltage drop reducer that will handle the amp load but here is the real question.

What are the issues with running a six volt positive ground radio = stock 51 Mercury radio, on 6 volt negative ground because I need to use a voltage reducer?

I had been thinking of just running a small 6 volt battery tucked away somewhere and charging it and go again and have it pos ground and the battery work totally separate from the rest of the rig. That radio isn't going to be the main source of sound in the rig but I want it to work for show and tell time .

 

If you are going to use a 6 volt positive earth radio on a 6 volt negative ground system you would have to make sure that the radio is totally insulated from the body work. Then you can run a lead from the radio casing to the positive terminal on the battery and a lead from the negative terminal on the battery to the radio feed. with an inline fuse. I believe there are place around that with convert you radio from positive to negative earth.

 

Radios don't care - just hook it up & use it.

 

some radios care, some don't. Looking at the schematic might help figure it out. Or listen to old guys who've run them with reverse polarity and had it work...

they generally use a********* to make the high voltage for the anode, and it's crude AC, rectified with a rectifier tube. So it should be fine?

although there might be some electrolytic capacitors in the low voltage side, that might not like being wired up backwards.

post the schematic, we'll take a look.