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Old November 21st 07, 10:59 AM posted to rec.radio.amateur.boatanchors
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First recorded activity by RadioBanter: Oct 2006
Posts: 527
Default BC-453 IF tuning

On Nov 15, 1:06 pm, "Antonio Vernucci" wrote:
I would assume that maximum selectivity occurs when the 85 kHz IF trasformers
actuators are fully pulled up (maximum distance between primary and secondary
windings).

Can any one please confirm or deny?

73

Tony I0JX


I found complete military manuals with alignment data at:

http://www.kg7bz.net/

The adjustable coupling is used for alignment. Two receivers have
variable coupling. The coupling is set for minimum (greatest
selectivity) for adjustment. Then either just the first or all three
are set for maximum coupling depending on the particular model.
I knew I had seen these manuals somewhere but had to look at the
bookmarks on another computer to find them.

--
Richard Knoppow
Los Angeles, CA, USA
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Old November 21st 07, 05:19 PM posted to rec.radio.amateur.boatanchors
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First recorded activity by RadioBanter: Nov 2007
Posts: 34
Default BC-453 IF tuning


On Nov 15, 1:06 pm, "Antonio Vernucci" wrote:
I would assume that maximum selectivity occurs when the 85 kHz IF
trasformers
actuators are fully pulled up (maximum distance between primary and
secondary
windings).

Can any one please confirm or deny?

73

Tony I0JX


I found complete military manuals with alignment data at:

http://www.kg7bz.net/

The adjustable coupling is used for alignment. Two receivers have
variable coupling. The coupling is set for minimum (greatest
selectivity) for adjustment. Then either just the first or all three
are set for maximum coupling depending on the particular model.
I knew I had seen these manuals somewhere but had to look at the
bookmarks on another computer to find them.
Richard Knoppow


Wow, thanks for bringing KG7BZ's web site to the front! The alignment
procedure you found there explains a lot.
Lynn, W7LTQ


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