[time-nuts] General Technology Corp model 304b

[Donald Henderickx]

After following Ed Palmer's thread on 304b restoration,I was inspired to 
get my GTC (tracor) 304b ser#279 going.  It seems that the failure of 
this unit was the break down of the foam that was wrapped around the 
vcxo located inside the control box. The vapors or the moisture the foam 
collected corroded the steel fasteners and caused the switches to become 
intermittent.
The replacement of the foam in the control box is not that much of a 
problem,what I need help with is what to use around the Rb lamp base. 
The foam has turned to powder.  Should I try Home foam sealant? The 
cell's ,of this seem about the same as the old foam.Will it take the 
heat? Should I make a fiberglass cocoon to put around the lamp base.
The unit now achieves lock in about an hour. The only other thing I did 
was to replace the caps in the main supply.
Any thoughts on the insulation?
Don H