Greetings to you all. I'm new to the Drake world and I just recently traded for a R-4A/T-4X combo that had sat unused for many years. While the equipment is in pretty decent shape over all, all of the mechanical elements were gummed up with hardened grease, oil and nicotine deposits (apparently, a previous owner was a heavy smoker). I've managed to clean them up considerably and have the PTOs on both radios working smoothly enough that I can easily tune across the band with one finger.
The passband tuning on the R-4A is giving me some trouble, however. The inner shaft was frozen up completely and I was forced to remove the read panel of the PBT unit in order to clean the gunk off the shaft and tapered disk free it up. The problem is that, after reassembly, I'm not sure how how it's supposed to operate because I've never seen one in woking condition before. It seems that no matter how I adjust it, it wants to bind up a bit. So, what I'm asking is how many degrees of knob rotation should I expect? How should should the the screw and locknut on the rear panel be adjusted? Should there be friction or should the knob turn freely? Should there be any end play? Where should the thickest part of the tapered disk be when the knob is at the 12 o'clock position? Any help will be greatly appreciated. 73, Carl, KJ6BSO _______________________________________________ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
