Silver solder will hold up to heat that would melt it! The capilary action and the imbrittlement of the metals make grid rings hold and the main grid mount survive all but white heat on the grids. It is still prudent to keep the grid temps low and that means watching the thing like a hawk in all runs and tests.
I have melted grids, but never had one fly apart at any silver soldered joint.
Richard Hull
Created on Wednesday, May 09, 2001 12:21 AM EDT by Richard Hull