Long ago, I did an IF alignment on my RCA CTC16E (GF681) using the RCA marker, sweep generators and RCA scope per RCA factory service manual.
As Marty59 said re IF alignment, I was expecting huge improvement but my results were unremarkable.
The WWII-era guys I worked for/with always said IF alignments were unnecessary unless someone else diddled with it first. Also need a touch-up if you replaced a trap, stage coupling transformer.
Though I sold my marker and sweep gens, I wonder if a Sencore Speed-aligner would help get the job done?
