On Fri, 20 Apr 2012 09:10:37 -0500, Ernie wrote:
> My old receiver's IF wouldn't align and I finally traced it down to the
> IF can. A grid dip meter shows the primaries and secondaries of each
> coil are anywhere from 20 to 40 kc away from the design frequency
> (460kc). The trimmers trim OK, but just not close to 460 kc. I can bring
> each coil back to the IF frequency by soldering another small value cap
> (100 pf or less) parallel to the trimmer. The capacitor sellers have all
> sorts of variations and I am wondering if anyone can give me a
> suggestion as to what kind would be the best to use for this
> application? Thank you.
Grid dip meters are notoriously inaccurate. If the IF is 460 KHz, listen
for the meter's 2nd harmonic on 920 KHz with a broadcast radio before you
do something you can't undo.
It's especially suspicious that ALL the IF cans are off by the same
Jim Mueller wrongn...@nospam.com
To get my real email address, replace wrongname with dadoheadman.
Then replace nospam with fastmail. Lastly, replace com with us.