More than likely the cause of your problem was the connection between the two boards developed a cold solder joint and began to ark.  This happens all the time with this PA.  It may not have had anything to do with your load.  If you have 70W going in and 4W reflected, that's about a 1.65:1 VSWR, which is not that bad.
 
Chris
 
In a message dated 3/13/2006 5:54:44 P.M. Central Standard Time, [email protected] writes:
Here's the photos of a *VHF* PA that didn't get the board to board
jumper mod and the results of driving it into a load that wasn't 50 Ohm
that was probably reactive in some way also...
 








YAHOO! GROUPS LINKS




Reply via email to