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1967 Vintage 5 x 7 Tweeter Replacement?

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I am repairing a built in home stereo system that uses Frazier speakers in every room.  Each speaker is a 12 x 12 x 16 cabinet with an 8" woofer and a 5 x 7 tweeter.  The tweeters are the black bell type with alnico magnetics. The tweeters are blown in at least 2 of 12 tweeters, and there are at least a couple more. 

 

Knowing that there is a lot of common driver parts between Klipsch and Frazier, I am posting my questions here and in the Frazier sites. 

 

Checking the internet I cannot find any diaphragm replacement kits. Are there any available?

 

Next option is I have found some 5 X 7 Frazier replacement tweeter assemblies at a decent price, but the magnetic arrangement is different.  Instead of the tall small diameter alnico style magnet under a plastic cup, it has a short large diameter magnetic and no cup.  The tweeters are marked on the back with:

 

Frazier

F-3x7

N4850-F

114850-F

U.S.PAT.

3,898,393

 

Are these equivalent specs? And what are the differences?

 

Thanks in advance 

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A little work may be required.

 

The horns with Alnico magnets had a cup cast into the back (of the horn) that needs a chunk broken out with a pair of pliers for the terminal board.

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Do you have the skills to align the diaphragm?

 

I've done it before, but it requires a degree of skill that many will not have.

 

It's similar to the earliest EV T35/K77 that don't use the plastic carrier.

 

Also, you need to check the coil height vs the plane of the dome edge.

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DJK,

 

I found a retired aerospace engineer that rebuilds vintage hifi equipment as a hobby.  He has already rebuilt multiple Frazier horn tweeters. He is also re conning my woofers, which are Altec 403A ALNiCO based.  

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Check the dimensions, and if they check out you shouldn't have any problems then.

 

Please let us know how it works out.

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