Firstly, thank you all who contributed to the questions I asked on these subjects. Some suggestions did not pertain directly to my model number, nevertheless they contributed to the overall knowledge of the subject.
As for the ball bearings which fell out of the main tuning shaft on the T-4XB transmitter, my wife and I spent a long time trying to get the bearings back in and staying in place. She has a much steadier hand than do I. I removed the can from the VFO and by backing off the adjustment screw (seen at the front end of the VFO assembly) with a long handled Allen wrench 3/32 in size, it produced a wider gap on the bearing race and the bearings went in easily, BUT, they would fall right through and we would start the process again. Finally I figured that I should fill the race with new grease which would help keep them in place and also prevent their falling through. My plan of attack then was to tighten the set screw just to the point where I could not get a bearing to slip into the race, and by keeping a small amount of pressure on the bearing I backed the set screw off just to the point where the bearing would go into the race and after that it was a matter of placing the other nine bearings in the race maintaining the same gap so that the balls would just nicely slip into the race. A small tightening of the set screw then completes the job but do not tighten it too much. Overdoing it would likely wreck the ball bearings. By the way, yes there are ten bearings although at first glance it looks like there should be 12, however they all come together when the set screw is tightened a wee bit after installation. And by the way I dropped the balls in at the same point in the race, just pushed them around as each ball was inserted. I should mention that I stood the T-4XB on its nose on top of a few large books high enough that I didn't have to break my neck to look in. Looks more shaky than it really is. Just be careful and don't let the rig fall over. I had no problem. The point is you will need to be able to work the main tuning knob a bit when putting the bearings back in and you can do that when the radio is propped up between two stacks of books. Now the bad news. I have taken out and re-installed the bearings three times, (getting pretty good at it by now) but as careful as I could be I could not get the dial calibration to stay put. I expect the stress of re-installing the bearings, stress on the set screw and certainly on the cover can, it would throw the calibration off which was and is a pain in the you know what. Does anyone have any suggestion short of giving this transmitter to my grandson to see if he can learn anything by taking it apart, as to how I can get the actual frequency of the transmitter to accurately coincide with the plastic dial reading? At the moment its about 100 Khz off although I did have it about 15 Khz at one point. Again, thanks so much to all who have helped on this and also the hum in my 2-C receiver which I have not tackled so far. I appreciated it no end. 73... Cliff
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