Guest gary35pj Posted February 4, 2007 Report Posted February 4, 2007 My friend has a #603 mopar radio he wants to sell to me. He put in an electronic vibrator. It needs to be cleaned but otherwise it works. Will this fit my 51 truck? Or should I ask, what will this fit? Quote
Reg Evans Posted February 4, 2007 Report Posted February 4, 2007 If it has the vertical dial it's for the 48-50 models. If it has the horizontal dial it might. Quote
Vintrader Posted February 4, 2007 Report Posted February 4, 2007 I am not sure I should ask, But what is a electronic vibrator? Quote
Don Coatney Posted February 4, 2007 Report Posted February 4, 2007 I am not sure I should ask, But what is a electronic vibrator? I was wondering the same thing. So I googled it. I will probably spend the rest of the day learning all about it as I got several interesting hits. Quote
Mario Loya B1B Posted February 4, 2007 Report Posted February 4, 2007 Vibrator (electronic) From Wikipedia, the free encyclopedia For other uses of the term, see vibrator. In early electronics vibrators were used in inverter circuits to provide an alternating current (AC) electric power supply from a direct current (DC) source. The primary use for this type of circuit was for vacuum tube type automobile radios. Vacuum tubes require relatively high voltages ranging from about 45 volts to 450 volts in consumer electronics. For portable radios, hearing aids and similar equipment, B batteries were manufactured with various voltage ratings. In order to provide the necessary voltage for a radio from the typical 6 volt DC supply available in a car, it was necessary to convert the DC supply to AC and use a transformer to increase the voltage. The rapid motion of the vibrator was used to operate a switch. The switch was used to alternate the connection of the 6 volt DC power between two terminals of a transformer, in effect, supplying an AC input voltage to the transformer. The transformer produced a higher voltage AC supply at its output terminals. This arrangement is a simple type of inverter circuit. The vibrator switches used for this purpose were usually encased in a steel or aluminum can equipped with a plug for mounting in a tube socket. Quote
Guest gary35pj Posted February 4, 2007 Report Posted February 4, 2007 I am impressed with the electronic vibrator answer. I dont know what it means but it was very impressive!! He said his wife ordered it but when it came it was not what she ordered. So he installed it on the radio. Ha Ha. I will check to see if it is vertical or horizontal. Thanks guys. Quote
Bob_Koch Posted February 4, 2007 Report Posted February 4, 2007 The vibrator converts the DC (direct current) from your battery to an AC (alternating current) so that the radio can step up the voltage necessary for use with the tubes. As already stated in the responses, your radio needs about 350-450 volts to operate correctly with tubes. The original vibrators were mechanical - They "vibrated" hundreds of times per second in order to make the AC. You can actually hear them working as they give out a hummm. But we all know mechanical devices wear out over time . The electronic vibrator will accomplish the same thing, but it uses solid state circuits to do it. Nothing mechanical to wear out. Quote
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