[R-390] A vs non A

[Thomas Frobase]

After Hurricane Rita blew through Beaumont TX a local surplus dealer 
here in Houston emptied out his warehouse and sold a large lot of really 
nice test equipment.  I was fortunate enough to purchase a 3577A HP 
network analyzer 5hz -210MHz.

At the time I had several 51J Collins to restore, one of which the IF 
was totally hosed, after messing with the set for over an hour I still 
was not satisfied with the alignment or the filters.  I then fed the 
network analyzer output to the mixer output and its input to the IF out 
on the back of the set.  In less than 10 minutes I had aligned perfectly.

I have done the same with 390's 390A's in short order as well.  All I 
can say is a picture is worth a thousand words, 73, tom, N3LLL.