Stienway sustenuto bar

[Delwin D Fandrich]

----- Original Message -----
From: "Keith Roberts" <kpiano@goldrush.com>
To: "Pianotech" <pianotech@ptg.org>
Sent: June 05, 2003 10:47 AM
Subject: Re: Stienway sustenuto bar


> I think soft soldering is better. Use some rosin core solder for
electrical
> stuff as it doesn't use an acid based flux and you won't have the thing
turn
> green on you. Del said hard solder but I think he meant the soft wire
solder
> for copper water pipe etc. Silver solder and brazing temperatures run
over
> 1000 degrees F which is almost the melting point of the brass. If you can
> find some old 50/50 solder, it melts around 600 degrees. The silver based
> soft solders for water tube melt around 700. If you happen to not get it
in
> exactly the right place, it melts easily. A large soldering gun or an old
> time big soldering iron will do the job. Even you heat gun if it throws
out
> 850 degrees. No sense laying a torch on it.
> Keith Roberts


I'm sure you're right. My terminology is some dated. I learned to solder
back in a special USAF school during the 1960s where we were taught
soldering to what were then NASA specs. But the terminology among the
instructors was a bit loose and I've not given it much thought since. If I
recall correctly the stuff referred to as "hard" solder was distinguished
from "soft" solder because it had some silver in it and melted as a higher
temperature. Beyond this I'd have to get out the books.

Del