BoatBanter.com - VHF radio fault

Brit wrote in news:1180282821.369833.41320
@u30g2000hsc.googlegroups.com:

Kelvin Hughes Huson 70

I bet the old analog synthesizer oscillators have drifted too far away
from home to sync up properly, which generates this type of error on
synthesized radios..... The coil cores I see in the picture may have
shifted pounding in the waves. The parts, namely capacitors, are also
getting older in the oscillators.
http://www.discriminator.nl/husun70/index-en.html
Look at this webpage, which tells you how to hook this radio up to a data
modem like Pactor or AIS. See the shielded box? That's the synthesizer
that sets the frequency of receive and transmit. See the tuning holes in
it with ferrite-tuned coils? Those are the frequency adjustments. It's
illegal to adjust them.....unless you're a licensed technician with
proper equipment because they will make the radio out of frequency
tolerance. You'll need a plastic tuning tool that fits the coil cores to
move them. If they are tight, DON'T FORCE IT! Ferrite is very brittle
and pressure on the tool WILL, not may, crack them, rendering them
useless. Note their starting position so you can replace them at exactly
where you started, in degrees and count how many turns you turn them.
You shouldn't have to move them far to get them to resync, if the xtal
reference oscillator is actually running, which it may not. The display
will, probably, read the channel number when they sync up. If you find
the sync point, note where it starts and continue rotating the coil to
find out where it errors, again. Set the coil in between these two
points and it should stay sync'd from channel 1 to the upper limit.

Of course, I told you never to touch it....right?....(c;

Sail out into the ocean beyond the limits and have a radio emergency...
(c;

Larry
--
If it goes in it'll require re-alignment, anyways, so you have nothing to
lose. Put the coils back where you started if moving it doesn't make any
difference.