My 8753D has pulled up lame with the 'No IF found. Check R input level' error.
I've not dug into it too deep yet, but common wisdom seems to be that it's going to be the YIG. I can't find a 7934 for less than I paid for the NA, so I'm looking for close enough alternatives. Someone pointed me at the 7747, but I've been unable to ascertain interchangeability.
Any chance the 7747 is an earlier version of the 7934? Other alternatives?