[R-390] Mechanical Filter Repair

[Bob Camp]

Hi

The biggest problem with soldering #42 wire is the solder joint it's  
self. The wire "necks down" as it goes into the solder (strange but  
true). The effect is not important on large gauge wire. On small  
stuff it makes it weak right at the joint.

The answer is pretty simple. Just put a dot of glue, paint, bubble  
gum, or what ever you have on top of the joint.

Bob

On Jun 14, 2007, at 1:35 AM, ToddRoberts2001 at aol.com wrote:

> In a message dated 6/13/2007 7:59:37 PM Eastern Standard Time,
> mdmerz at verizon.net writes:
> I believe "formvar" will be hard to
> remove for soldering and abrasion is the most easily done method  
> for the
> formvar wire I've used.   There's probably a solvent that will work  
> but I
> never found one that acted very quickly.
>
>
> I have had very good luck using Strip-EZE paint remover. I put some  
> into a
> small bottle cap to a depth of about 1/4 inch and dip the end of  
> the wire into
> it for 5-10 minutes, then wipe the end of the wire with a kleenex.  
> The enamel
> coating comes right off and the copper is bright and shiny ready  
> for soldering.
> I use the same method to remove the enamel from small-gauge Litz  
> wire also.
> It is the best method I have found for safely removing the enamel  
> without
> hurting the fine wire.
>
> 73 Todd WD4NGG
>
>
>
> ************************************** See what's free at http:// 
> www.aol.com.
> _____________________________________________________________
> R-390 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/r-390
> Help: http://mailman.qth.net/faq.htm
> Post: mailto:R-390 at mailman.qth.net
> Unsubscribe: http://mailman.qth.net/mailman/options/r-390
>