[MRCA] LS-3 Speaker Repair

[scottjohnson1 at cox.net]

I have found that the best speaker cone cement, bar none, is butyl rubber
aircraft tank sealant.  Ask your friendly A-P mechanic if he has a leftover
kit, and scrounge it, Put it in the freezer if you don’t use all of the kit.
I like to use B1-2, which gives ½ hour working time and an 8-hour cure time.

 

Scott W7SVJ

 

From: mrca-bounces at mailman.qth.net <mrca-bounces at mailman.qth.net> On Behalf
Of Jeep Platt
Sent: Tuesday, April 1, 2025 08:57
To: Doran Platt <jeepp at comcast.net>; mrca at mailman.qth.net
Subject: Re: [MRCA] LS-3 Speaker Repair

 

On the other hand... rubber cement can work if most of the edges of the cone
and rim meet and can be bridged with the cement. 

 

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From: mrca-bounces at mailman.qth.net <mailto:mrca-bounces at mailman.qth.net>
<mrca-bounces at mailman.qth.net <mailto:mrca-bounces at mailman.qth.net> > on
behalf of Doran Platt via MRCA <mrca at mailman.qth.net
<mailto:mrca at mailman.qth.net> >
Sent: Tuesday, April 1, 2025 11:52:32 AM
To: mrca at mailman.qth.net <mailto:mrca at mailman.qth.net>
<mrca at mailman.qth.net <mailto:mrca at mailman.qth.net> >
Subject: Re: [MRCA] LS-3 Speaker Repair 

 

Been there... done that. Rather than try and repair the code, you might
simply use a new speaker that can be made to fit and such that the front
panel screw holes can be filled. It might even sound better.  the xformer
will be fine. 

Jeep K3HVG 

On 04/01/2025 11:39 AM EDT jphutch60bj <jphutch60bj at gmail.com
<mailto:jphutch60bj at gmail.com> > wrote: 

  

  

You can re-cone the speaker as long as the coil and center tube are good.
There is plenty of advice, guidance from from the Audio segment.  I did a
re-cone job on and LS-3, which still works.

Good luck.

 

On 4/1/2025 10:07 AM, MilComm Guy wrote: 

While I'm waiting for the black wrinkle paint to arrive I would like to try
and repair the speaker.  You can see the speaker "cloth" has torn away all
the way around the outside and partially in the center.  I am looking for
any repair advice. 



Thanks 

Mark 

K1HF 

 

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