CSS EL-70 phase plug?

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Hi Guys,
The EL-70 uses a 2-pack epoxy bond that's applied to the space between the cap, cone neck and voice coil former. Ummmmph.......I think extracting the cap is going to be difficult. There's more that a good chance of damaging the cone neck.

Might be worth trying by carefully cutting the top off the cap and gradually unpicking the glue, but no guarantees this is going to workout.

Cheers

Mark.
 
Ummmmph, cutting and peeling back the cap might work but could still disturb the bond between the cone and VC as the gluing is an all-in-one process for this particular part of the sub-assembly. If this bond is compromised, its pretty much the curtain call for the driver.

Providing the cap isn't punctured, I'd attempt to suck the cap back into shape with a vacuum cleaner with a small nozzle as a first option. I've rescued allot of caps and cones with this method.

Either method maybe worth doing since I guess if the caps so bad, there's little to loose.

VC OD (excluding winding) = 19.7-mm
VC ID = 19.3-mm

Cheers

Mark.
 
frugal-phile™
Joined 2001
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VC ID = 19.3-mm

Thanx Mark,

If i go thru the batch of FE108eS plug blanks and choose the smallest diameter, they should fit. I would recommend getting unfinished ones so that you can adjust the length and, if necessary sand down the barrel (a pain to do but what i do when i need a plug for the holey basket Coral version of the FE103A).

Note, that like the FE126/127 i do not recommend plugs for the EL70 unless it is the only way to recover a damaged dustcap. I've (luckily) not yet had to muck with an EL70 dustcap.

I have never had any luck with the vacuum cleaner, but have done a half decent job with a pin prick to lever out the cap. It doesn't come out perfect thou.

As the dustcap does a significant amount of the HF extension, losing the caps, or the inevitable reduction in stiffness from having creased the cap, the extreme top end will probably not be the same.

One trick passed on by a customer with dented FE126, was to carefully push in the cap (not too much) to create an inverted dome. He preferred them that way (until he tried too much of a good thing and pushed them too far).

dave
 
frugal-phile™
Joined 2001
Paid Member
Here is the picture i meant to attach in post $6 of some FE127 recovered from dust cap failure.

dave
 

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