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. _______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist
