Radio VIBRATOR 12 VOLT numbers
VIBRATOR 12 VOLT , any one know what number or numbers are on it for a 55 12V Corvette Radio. Thanks 
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Re: Radio VIBRATOR 12 VOLT numbers
Roy,
I took my radio out when I started body off restoration last summer/fall.
It's out in my trailer.
Where would I look to find the Vibrator part you want the number off of?
Is this part of the speaker?
Let me know what to look at/for.
Karl. -
Re: Radio VIBRATOR 12 VOLT numbers
Part number is on the vibrator Big numbers , and it's part to the speaker unit .thanks KarlComment
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Re: Radio VIBRATOR 12 VOLT numbers
I wish you good luck, but the chances of any original vibrator still in a radio all these years is slim to none. They were a high failure item, and were almost always replaced with some other brand obtained at a local radio store. I repaired radios and TVs back in the late 50s & 60s. Always threw out all old parts. If I knew now what I didn't know then I would have saved every old Delco 0Z4 and vibrator, and I would have had a lot of them. I looked thru my collection of old parts, I have several vibrators, but none are Delco. -Dan-Comment
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Re: Radio VIBRATOR 12 VOLT numbers
My vibrator is a Mallory G650. FenwickComment
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Re: Radio VIBRATOR 12 VOLT numbers
Roy,
The Vibrator in my speaker unit is a Mallory
Number printed sideways is: 335814 The first number (3)
is partly gone, but what I can make out is a 3 to me.
On the front in the rectangle is:
MALLORY
VIBRATOR
TYPE 12 -3 (the 3 looks iffy)
FOR USE ON
12 VOLT BATTERY
PATENT NOS. 2,190,555
2,197,607 2,447,046
2,732,457 ET AL
MADE IN USA
I hope this helps you.
Karl.Comment
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Re: Radio VIBRATOR 12 VOLT numbers
A vibrator with a radio,,,, way ahead of their time !
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Re: Radio VIBRATOR 12 VOLT numbers
I'm sure you already know this Roy, but just in case,... these are quite often replaced with solid-state units nowadays. Even if you would be lucky enough to find a NOS unit it probably would have corroded contacts (although this can sometimes be reversible on even an old used one by opening the can or else zapping them with 120 volts) information for this exists on several websites. Of course if you want car judged you may not want modern solid-state version. "Hope this makes sense it's been a long day" CheersComment
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Re: Radio VIBRATOR 12 VOLT numbers
I've never done this, but it should be possible now days to have the radio work by solid state, but leave the vibrator intact. The contacts are usually what fail because of the current they are handling, but the vibrator should still be able to 'buss' and satisfy the judges - just not carry any current. Internal mods to the electronics for sure, but hidden within the confins of the speaker unit. -Dan-Comment
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Re: Radio VIBRATOR 12 VOLT numbers
OK thanks guys
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Re: Radio VIBRATOR 12 VOLT numbers
I just got lucky and found several old vibrators in my archives. I have 2 Delco 12V 3 pin vibrators that have different markings and part numbers. One has black lettering on the top that says "Delco Radio 7271920 12 VOLTS". The other one is marked on the side with red lettering within a large rectangle. It says "Delco Radio 7265528 12 VOLT". Then there are 7 different patent numbers and "MADE IN USA". Outside the rectangle are the numbers "235549". I also have 2 non-Delco 4 pin 12V vibrators, and a 6V Delco unit. I think that one is probably out of my 54 Corvette.
Memory is failing some in old age, but I kind of remember the 4 pin units were either off very early 12V radios, or from Ford/Chrysler.
Roy, do you know if your vibrator is 3 pin or 4? That would help. With the exception of the 6V regulator, I don't believe any of my vibrators are from Corvettes. And I know for sure I never worked on a 55 Corvette radio - they are quite unique (I did work on a 56 once). Based on what I worked on back then I believe most of my vibrators are probably off GM tin cars.
There should not be very many variations of vibrators. They were pretty standard back then. The frequency was usually 115Hz.
If I can figure out how to post photos I will snap some shots and put them up. I'm sure its not too hard to do. -Dan-Comment
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Re: Radio VIBRATOR 12 VOLT numbers
The one I covered in red 3 pin should be Corvette because 55 used three pins. 54 used four pins pic. bottom right , would you sell the one in red to me thanks ROY
when you replie look down below where it says (manage attachments ) then you see how to up load a pic. if it's not to big.Comment
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Re: Radio VIBRATOR 12 VOLT numbers
Hi Roy. Sorry I have not been able to get back to you until now. My daughter and family (family = her, husband, 3 small children, dog) came in from out of town Thursday afternoon. Needless to say I have not had much time. They just left so maybe I can get back on track now. I'm not sure just exactly what you are trying to do. I do not know if either of my vibrators work or not, but I can easily test them in a radio I have. Judging by the photos you put up, it looks like you have a restored radio for your 55. Keep in mind my vibrators are very old and would have to be replated and silk screened in order to make them look as good as your speaker unit does. Being old, even if they do work there is no telling how long they would last. These things were the weak link in all old car radios prior to 1958. If you want mine for an example of an original type vibrator in order to refubrish a NOS one, I will give you mine. One thing I would like to tell you is one of the main reasons vibrators failed was due to a capacitor on the bottom side of the speaker unit. This capacitor is known as a "buffer capacitor", and any time you replaced a vibrator you always replaced this capacitor along with it. This capacitor is used to suppress arcing on the vibrator contacts. It is a high voltage capacitor - rated at 1600 volts, and capacitors back in those days were not very good. Contact arcing generates very high voltages, and this capacitor had to be able handle the voltages produced. These old capacitors were made using a paper dielectric, and were wax dipped. Moisture would migrate through the wax and eventually the dielectric would break down. When this happened the vibrator contacts would arc and failure was not far off.
If your radio has been restored, most surely this capacitor would have been replaced with a modern day capacitor that would be much more reliable. But is sounds like your vibrator has failed, which could be a normal thing, or for some reason the buffer capacitor is bad.
I see you have put up a post looking to get your radio repaired. To offer you another choice, I could easily get your radio working again for not much money, and I could turn it quickly. These old radios are really quite simple and not much, other than vibrators and OZ4s, ever go wrong with them. However I have some caviats: 1 - I cannot restore metal work. 2 - I cannot convert to solid state. 3 - I cannot install an ipod. 4 - I don't have a source for a new vibrator right now, and that is paramount.
I would install a new reliable buffer capacitor, and all paper capacitors for that matter. There are several in the radio unit - and if they are old they need to go.
Just thought I would throw this out to you Roy. Let me know, and again, sorry I could not get back to you sooner. -Dan-Comment
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Re: Radio VIBRATOR 12 VOLT numbers
Dan thanks for the offer , that not my radio used a pic. from e-bay seller, my radio works and never been redone and wonted an extra Delco vibrator
ROYComment
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