Steve -
Um, if you would bother to look at your B-Line CD, in the MISC directory, there is a file called 'PB
Tuner Mechanical'. Hidden in there is a procedure for opening, cleaning and closing the PB Tuner!!
The problem is the same as the PTO, the original grease has hardened and is not allowing the slug
carriage to move smoothly.
As some have said, 'RTFCD!!' :-)
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service Supplement CDs
<www.k4oah.com>
Steve Wedge wrote:
I was realigning my "hot-rodded" R-4B last night (the PO had moved some things
around for some reason - probably to change where the beat note would peak) and got to
the adjustment of the four-slug PBT rack or coil carriage (whatever it is).
Moving the PBT in 4.8 from 9 to 3 o'clock had different sounds (indicating it
needed to be re-centred), so I started turning the central screw. I got to a
point where the PBT wouldn't tune ANYTHING, so started returning it to closer
to where it was. Still no change. It seemed the carriage wasn't moving in and
out anymore. I don't know what happened, but turning that central screw in
more finally allowed me to use the PBT again, but now it was off. I re-peaked
the four coils again and it seems to be working, but I do notice that USB
sounds bassier than LSB, so this thing's still not right.
It appears that the central screw applies tension to the whole carriage and
moves the entire assembly in or out in unison.
What can break in there, and has anyone taken the shields off one of these
puppies to work on the innards? The process will involve breaking solder
joints, so I don't want to take apart anything that will fly apart like the
recoil mechanism of a chainsaw (DAMHIKT...).
73,
Steve.
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