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In Reply to: RE: Ping Michael Samra, FM for beginners? posted by Eli Duttman on November 07, 2016 at 18:04:17
The only exception to tbis is the Dynaco tuners (FM3 and FM5) which were specifically designed to be aligned without test equipment (FM3) or were pre-aligned (FM5)
Follow Ups:
The truth is that even the FM3 will most likely need an instrument alignment at its current age. The problem is that the entire home alignment procedure is predicated on the IF transformers being fairly close to 10.7MHz. As supplied they were pretuned to this frequency. Every FM3 I've played with had IFs way off this frequency so while they received stations, sensitivity was below par and dial tracking was way off. VanAlstine describes the situation in more detail at his website.
is breaking the tuning slugs in the transformers
;-)
be VERY careful working on fifty, sixty year old (or older) tuners!
all the best,
mrh
Just wondering: Has anyone tried blasting the IF coils with a hair dryer to loosen up the slug?
Is that a Radio Craftsman mono tuner/preamp?
Dave
nt
all the best,
mrh
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