[Amps] Ameritron band switch repair

[Carl]

----- Original Message ----- 
From: "Jim Thomson" <jim.thom at telus.net>
To: <amps at contesting.com>
Sent: Thursday, February 07, 2013 4:27 AM
Subject: [Amps] Ameritron band switch repair


> Date: Tue, 5 Feb 2013 12:58:55 -0500
> From: "Randall, Randy" <Randy.Randall at uchealth.com>
>
> Subject: Re: [Amps] Ameritron band switch repair
> Message-ID:
> <5CBCD439080F744F966BB2815C0607750272E20F1242 at MAIL-B.healthall.com>
> Content-Type: text/plain; charset="us-ascii"
>
> I have picked up a few Wellers 8200's and D550's at hamfests for as little 
> as $2.00 working and in good shape but minus the tip. It is odd that some 
> hams think that soldering guns are useless or only for tube work. Bargains 
> are out there but you have to be early and dig in the boxes!
>
>
> Randy E. Randall AB9GO
>
> ##  I had 1-2 soldering guns go kaput on me.  I gave up on em and instead 
> use a heavy duty iron.  The iron of choice is made by “american beauty” 
> Mine has a 100w ele  and a .375” diam tip..which tapers
> to a wedge.   You can also get em in 150W.   You can also get em  in 550 
> watts, with  half inch diam tips.   Those are made for doing plumbing 
> jobs.  telco’s have used the american beauty irons  for the ;last 75 
> years.
> seldom used these days,  but every office still has em laying around. 
> You don’t lose heat with big .375 to .5” size tips.  They store a helluva 
> lot of heat.
>
> ##  IF u are building hb amps  with big bandswitchs  like the model 85/88 
> type.....don’t mess with solder. use machine screws and wide cu strap at 
> the switch end.  At the tank coil end, u simply wrap the cu strap
> around the tubing coils, and they are cinched down super tight with a 
> single machine screw.   Then if u have to change the tap position, no big 
> deal, just loosen the machine screws.
>
> later... Jim  VE7RF

And then use silver solder to finish up once the taps are set. Also use 
brass screws/nuts on the switch and also solder.  A screw and nut even with 
tooth washer will eventually loosen with repeated heating /cooling cycles.

Carl


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