'62 radio speaker

[G B.]

My 11/72 edition of P & A 5B Chevrolet Radio Parts catalog gives the part number for a '61 - '62 Corvette Wonderbar speaker as 7270428. Was this same part number used for the '62 speaker on the assembly line?

A seller on eBay has two #7281141 speakers up for auction. What is the original application for this part number?

The same seller has a #7270531 speaker up for auction. What is the original application for this part number?

Thanks for any help you can give me. I apologize for not owning a '62 assembly manual at this time. I will remedy that shortly.

[William C.]

Re: '62 radio speaker

AIM for '62 lists 728111 as speaker and transformer assembly, as they would have been recieved at the plant. None of the numbers you have shown are included in the '49-72 Chevrolet Radio Parts book. (P&A 5B)

[Jack H.]

Re: '62 radio speaker

Factory PN for speaker used '58-61 was 7270423. The PN changed for the '62 MY to 7281141. By 1965, the speaker was PN 7282156. But, ALL of these revisions were downward compatible. There were one if not more PN revisions for service replacement 6x9 speakers over the following years, again, all downward compatible.

I can't say if speakers in service inventory during the active Corvette production years were different from those used in production. Sometimes the fact that a given part was packaged in a retail box or with attaching hardware changed its PN from that used on the assy line...

This is an area (part history) that Joe Lucia typically has EXCELLENT insight into...

[G B.]

I am cornfused.

Thank you all for responding so quickly. Please help me understand your comments.

In an e-mail, Donald 31176 said the '62 speaker part number in his AIM is 7281111. In your AIM, Bill, the speaker part number is 728111. And Jack, you gave the '62 part number as 7281141. I guess you all could be right if the part number changed during the model year, but perhaps some of your numbers contain a typo.

Would you guys mind taking a second look at your references and confirming the part numbers in your previous posts?

[William C.]

Re: I am cornfused.

Sure Jerry, '62 AIM shows speaker with transformer as 7281111, sorry my finger slipped a number, while we're at it, '60 AIM shows the speaker/transformer combo as 7270423, both seven digit part numbers as per GM practice at the time. I didn't look for the eBay parts, but if they don't have the transformers included (normal service practice is less transformer) the AIM numbers are useless.

[Loren L.]

RS 42 Service and shop manual for

1962 Radios shows #7281141 for the speaker.

[Jack H.]

Re: I am cornfused.

I don't have a '62 AIM and quoted the 7281141 PN from Delco Radio Service Bulletin 6D-890, dated 10/1/61 where a parts list is given for the 985383 Corvette Wonderbar radio. The speaker PN shows an asterisk with the following note:

"Part First Used in 1962"

Now, it may be a case where there's a typo in the service bulletin. It might also be a situation where the service spare part had a PN that differed from the factory PN.

Also, one other responded with a comment on whether the matching transformer was on the speaker or not. The Delco Radio parts catalog doesn't list the transformer separately...it's an integral component of the speaker!

[Michael H.]

Re: I am cornfused.

Not sure about the C1 speaker but I know for sure that the 63-67 speaker that was sold in service, at least in the early 70's, came without the transformer. Of interest is the fact that the AIM lists a 7282156 speaker with no mention of a transformer and, if I remember correctly, the very same part number was in the Delco radio book for service, but minus the transformer.

[G B.]

'63 - '64 speaker part number

I have a couple of old original '63 - '64 speakers. They are both ink-stamped 7282156 on the magnet.

My 11/72 Chevrolet Radio P & A Catalog lists the part number for the '63 - '67 speaker as 7282256. There are no other applications listed for that particular speaker. The description just says: (6" x 9"). Very odd.

Does anyone have an original '62 Corvette speaker they can check for an ink-stamped part number?

[Michael H.]

Re: '63 - '64 speaker part number

Thanks Jerry. So, there IS a different part number for a service speaker without transformer. I remembered the xxx56 part (from 30 years ago) but missed the fact that it was 256, not 156. That must be the difference between with/without transformer?

[G B.]

I dunno.

That 256 speaker might have been the shallow "service" design frame that I used to get when I bought new Delco 6x9 speakers back in the seventies. I just don't remember now. I also can't remember for sure if they had a transformer, but I really don't think so.

[Wayne M.]

Here's an eBay 256 (shallow)

and the "156"s have the long dimension of the magnet in the long axis of the speaker, AND are not of a shallow basket design.

My early '65 air car has its original "156" and I don't think it's shallow (haven't had it out, though).

There was an NOS (w/Delco Box) "256" without transformer on eBay,but the photo was too fuzzy to check the ink stamp on the magnet.

All my C2 Chevrolet Radio Service and Shop Manuals call for the "256" in the Corvette.

[Michael H.]

Re: Here's an eBay 256 (shallow)

Wayne,

Bet the one in your pic was originally without transformer and the purchaser added the one from his old replaced speaker.

In about 1973, the speaker in my 65 was dying so I ordered two new ones. Both came in minus transformers. I don't remember if they were the shallow design that you and Jerry refer to but it's quite possible.

[Michael H.]

Re: Here's an eBay 256 (shallow)

Just looked for the original 156 in a few old number change books and, so far, I can't find anything that shows it was ever available in service. Possible that it was always serviced with the non transformer 256? The only point in time that I have no coverage on is between 1970 and 1972. Anyone have a price book in the mid/late 60's that shows a 7282156?

[G B.]

I've got a P & A 30 dated 10/66.

It doesn't have any front speakers in Group 9.650, just radios.

It does have "rear or auxiliary" speaker listings in 9.665, but nothing for a Corvette of course. It also says "Parts not shown in this group will be found in the Radio Catalog (P & A #5B)".