Then I found the old vibrator from AES that was in the radio. Hooked it up and it played for a short while then shut down. The vibrator was HOT. So I presume the 8.42 battery is ruining the vibrator?
Help or suggestions please. Thanks
Overall, I really don’t think that 8 Vdc level might be excessive for those radios.
Buttttttt….I was trying to think of what you might commonly have…in my case I have a nichrome heater element for an electric dryer that has open exposed coils , so I could just clip on test clips, creating slightly above the required resistance while having the unit running, and monitor the voltage with DC meter and move on down loops to positioning on lower resistance. But you may not have such….. so if you have parts galore… you might think about your having some hefty silicon rectifier diodes such that you could series insert two or three in line such that the voltage drop will be down ~1.4 VDC with two of them in line or ~2.1 v with 3 of them in series.
Figure that you are going to need diode studs rated in the order of ~5 amps…your common 1n4000 series would not work, unless you might additionally , cluster up 5 or so units in parallel to form each series diode element.
If you are into automotive or motorrrrrcyclees , therein, you might have a source of 2 or 3 alternator diodes, which would have hefty units that would fill the specs.
As a final thought, expecting that the unit is pulling about 5 amps, you would be needing a resistive drop of ~one half ohm for that , hows about trying one of your 25 ft or so extension cords where you are using the resistance drop of the length of one wire for its voltage drop (or short across one end to get a series of both of the wires when connecting to the male connector pins at one end).
Just another possibility.
73's de Edd
I guess that I was just fixated on the situation of you wanting to bench test or repair that unit.
But if you have to make it work with that combo of a battery and the 6V radio, the best facilitation would still be to go with the
series diodes for making the voltage drop.
73's de Edd
8.4 volts is a bit excessive for an auto radio, but not by much. The generating system in a car typically runs at 7.4 volts. Drop in the wiring might give the radio 7.0 volts. You might be burning up the vibrator from excessive voltage or you might be burning it up by wiring the battery incorrectly? Is the vibrator designed for a positive or negative ground radio?
T.
:
:8.4 volts is a bit excessive for an auto radio, but not by much. The generating system in a car typically runs at 7.4 volts. Drop in the wiring might give the radio 7.0 volts. You might be burning up the vibrator from excessive voltage or you might be burning it up by wiring the battery incorrectly? Is the vibrator designed for a positive or negative ground radio?
:
:T.
But remember, when the generator is charging the batteries, the Voltage may go up to 7.4 Volts, and so the eight Volts isn't too high, considering that. I am not sure that 8 Volts into a six Volt radio is your main problem.
Lewis
:If you use BIG diodes of the regular silicon form, each one will drop .7 volts. You aren't likely to find zener diodes that can handle what an auto radio requires.
:
:8.4 volts is a bit excessive for an auto radio, but not by much. The generating system in a car typically runs at 7.4 volts. Drop in the wiring might give the radio 7.0 volts. You might be burning up the vibrator from excessive voltage or you might be burning it up by wiring the battery incorrectly? Is the vibrator designed for a positive or negative ground radio?
:
:T.