[BC] recommended fluxes for silver soldering ground system/radials?

[Dale H. Cook]

At 08:07 PM 4/21/2010, Cowboy wrote:

>If the copper is CLEAN

In recent years I have used Dremel abrasive buffs to clean strap 
before brazing with 15% Silv-Alloy. The buffs come in three grits - 
180, 280 and 320. I sometimes have to start with the coarsest if 
bonding to an old strap, especially one that has been outdoors. I 
always end with the 320, even on new strap. Clean surfaces are a 
must. On thin, relatively narrow straps MAPP gas will work, but on 
anything with more mass I use oxy-propane (a trick learned from an 
auto mechanic decades ago - cheaper than oxy-acetylene and sufficient 
for anything short of heavy cutting).

Dale H. Cook, Contract Engineer, Roanoke/Lynchburg, VA
http://plymouthcolony.net/starcityeng/index.html