It had been some time since the old girl has been on the bench, dating back to my 2006 restoration.
Thought I’d take another crack at aligning the IF as I was not certain it was spot on. The original crystal in
the crystal filter was slightly off it’s target frequency of 500 Kc, so a quick align of the fixed and variable IF
brought all back into spec. The trusty HP 8640 signal generator was the ideal tool here, and I found I was
able to peak up the IF just a tad. The rest of the alignment was spot on from 5 years ago, a testimony
to the solid design and construction of the Collins gear.
Thought I’d take another crack at aligning the IF as I was not certain it was spot on. The original crystal in
the crystal filter was slightly off it’s target frequency of 500 Kc, so a quick align of the fixed and variable IF
brought all back into spec. The trusty HP 8640 signal generator was the ideal tool here, and I found I was
able to peak up the IF just a tad. The rest of the alignment was spot on from 5 years ago, a testimony
to the solid design and construction of the Collins gear.
