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 Post subject: Question for Wyatt A.K.A. MicaMonster
PostPosted: Mon Jan 29, 2018 2:22 pm 
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Victor IV
Joined: Mon Aug 24, 2009 3:08 pm
Posts: 1923
Location: Harrison Township, MI
Wyatt,

As I mention in another thread, I'm rebuilding a basket case brass Orthophonic reproducer. I'll be installing a new diaphragm. I read your "paper" on mounting the old spider. That all looks fine. My question concerns soldering the needle bar to the spider. Do you find that it's tricky to get the soldering done before the epoxy, (JB Weld?), begins to melt? Such a tiny aluminum part makes me worry that it will heat up extremely fast and ruin the epoxy. I believe there is a high heat JB Weld, perhaps use that?

Looking forward to your observations.

Thanks,

Jerry Van


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 Post subject: Re: Question for Wyatt A.K.A. MicaMonster
PostPosted: Mon Jan 29, 2018 2:43 pm 
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Victor IV
Joined: Mon Aug 24, 2009 3:08 pm
Posts: 1923
Location: Harrison Township, MI
Obviously, the experiences of others who have performed this same step are welcome as well :)


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 Post subject: Re: Question for Wyatt A.K.A. MicaMonster
PostPosted: Tue Jan 30, 2018 12:32 pm 
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Victor IV
Joined: Wed May 20, 2009 8:20 pm
Posts: 1054
I don't think it should be a problem. I have used 60/40 rosin core solder on original diaphragms where the spider legs are shellac sealed and had no problems with the shellac melting. The most difficult part of the job, for me, has been getting the soldering tip into that small space.

Jim


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 Post subject: Re: Question for Wyatt A.K.A. MicaMonster
PostPosted: Tue Jan 30, 2018 4:40 pm 
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Victor IV
Joined: Mon Aug 24, 2009 3:08 pm
Posts: 1923
Location: Harrison Township, MI
Jim,

Thank you! You make an excellent point about the shellac remaining intact. You're correct, it's a tight spot to do any soldering. Add to that, the fact that many times, the needle bar just does not want to be soldered!

I really appreciate your response Jim. Say hello to Linda for me.


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