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FDP Forum / Fender Amps: Vintage (before 1985) / Early 70's Fender Bandmaster cabinet speaker issue.

BbendFender
Contributing Member
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American Patriot

About as ordinary as you can get.
Jun 26th, 2019 09:27 AM   Edit   Profile  

I bought an early 70's Bandmaster cabinet yesterday and upon further inspection, I found both dust caps on the speakers to be off. They were between the baffle and grill cloth but they had become detached. I say they came off due to some hard playing otherwise the prev. owner would have removed them. No damage to the speaker cones on either speaker. These speakers are replacement speakers. Fender Special Design Eminence 12's.
This is the big cabinet. Anyone else ever had dust caps to pop off during play. Anyway, good score at a pawn shop for a clean cabinet.

pcalu

usa Thumb area Mi

Jun 27th, 2019 07:31 PM   Edit   Profile  

Nope... Never had that happen. Hmmmm?

Oxford 12T6, Utah 12" (ceramic) and JBL D-120 came in that era.

what do you think those are?

what would make the glue/adhesive deteriorate that hold the dust caps on... and not just on one but both. Are you sure there is no damage to the actual cones? If not ... just order some dust cap adhesive and put them back on. (make sure the VC is clean and free of dust and dirt before u put them back on)


Peegoo
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Planet Peegoo

Rhythm & Lewd Guitarist
Jun 28th, 2019 07:02 AM   Edit   Profile  

Some glues simply let go over time. Animal glues especially will release over time if the speakers are stored in damp conditions such as a basement. Vintage Jensens are known for dropping dust caps and voice coil formers because the glue they used breaks down, becomes brittle, and turns to powder.

You can use plain ol' Elmer's glue to affix the dust caps back in place; you can also use Titebond, Barge cement, E6000, and just about any other glue that is thick and doesn't soak into paper. CA will work, but only the thick stuff works well. Don't use accelerator.

There are several ways to do this.

A simple way is to make a small handle from masking tape and stick it to the face of the dust cap. Apply a thin ring of glue to the underside of the rim, and holding the little tape handle, gently press it into place on the speaker cone (speaker laying face up). Let the glue set up for an hour or three and remove the tape handle.

Another way is to have the speaker cone facing up; set the dust cap in place, stack a few small coins on it to hold in in place, and then use the glue bottle like a caulking gun to lay a small bead of glue all the way around the rim of the dust cap. A steady hand helps with neatness here.

Look here @ 14:25

(This message was last edited by Peegoo at 09:05 AM, Jun 28th, 2019)

BbendFender
Contributing Member
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American Patriot

About as ordinary as you can get.
Jun 28th, 2019 08:02 AM   Edit   Profile  

Peegoo, your suggestion is exactly what I did. I used thick CA and put a small weight on the dust cap until it dried. Fixed for another 50 years.

Peegoo
Contributing Member
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Planet Peegoo

Rhythm & Lewd Guitarist
Jun 28th, 2019 08:40 AM   Edit   Profile  

That glue joint will still be sound even after the paper it was holding together is completely gone :o)

Nice work!

FDP Forum / Fender Amps: Vintage (before 1985) / Early 70's Fender Bandmaster cabinet speaker issue.




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