RadioBanter - View Single Post

February 2nd 06, 12:00 AM posted to rec.radio.shortwave

wrote:
I have never found a mass-produced radio that was properly aligned.A
good first step is to tune the ferrite antenna to the maximum gain. The
oscillator coil is usually the one with a red core. Tune the radio to
about 570 for white noise or a weak station. Then adjust the oscillator
coil for maximum gain. You may have to follow the weak station up or
down the dial as you look for the signal peak. Next find the rf trimmer
and adjust it for maximum gain at 1500. Then go back to the red-marked
oscillator coil and readjust it for peak. It should not need much of an
adjustment. Do this several times until the gain is ok at both 570 and
1500.

Where did you get the idea that these are gain adjustments? They adjust the
FREQUENCY of the local oscillator, and assume that the ferrite antenna is
properly tuned as well. The adjustments you describe do *nothing* to
adjust the ferrite antenna.

--
If John McCain gets the 2008 Republican Presidential nomination,
my vote for President will be a write-in for Jiang Zemin.