[R-390] Gear Train Removal

[Jacques Fortin]

Barry, some COMMENTS imbedded in your text below.

73, Jacques, VE2JFE in Montreal

Well, I don't quite know how it happened, but I can no longer get all the cams properly aligned.  As I mentioned, I've removed the VR counter so that's one point of reference that I no longer have.

AH, DON'T WORRY: I HAVE DONE THE SAME FEW YEARS AGO....

I had been rotating the MC change gear one click or two and then back and no problem; however, I think I lost track of which way I had rotated it and now I can't get back to where 2.000 would normally be displayed by the counter.

FOR THE MC POSITION, JUST RELY ON THE ROTATING DIAL OF THE SYNC XTAL OSC THAT INDICATE ON WHICH MC POSITION THE SWITCHES ARE.

I'll mention that I've kept the Green Gear in place and, contrary to my previous comment, that gear does indeed keep the MC and KC gears synchronized and, given that, I don't know how they're no longer where I can get them back in sync.

IT DEPEND ALSO IF YOU SET THE PROPER MECHANISM POSITION CORRECTLY BEFORE REMOVING THE RF DECK.
READ THE CHAPTER 59 CAREFULLY AGAIN !!!
THEN, ROTATE THE KC SHAFT AND TRY FIRST TO ALIGN THE 8-16 MC CAM.
IF YOU ARE LUCKY, ALL THE OTHER ONES WILL ALIGN (IF THEY WERE ALIGNED CORRECTLY PREVIOUSLY).
IF NOT, TRY A FULL TURN AROUND LEFT OR RIGHT (DEPENDING THAT YOU REMEMBER OR NOT WHAT YOU HAVE DONE BEFORE).
OR... JUST TAKE THE PROPER ALIGNMENT OF THE 8-16 mc AS THE STARTING POINT AND FOLLOW THE FULL CAMS RE-ALIGNMENT PROCEDURE CAREFULLY !

According to the manual, as part of the complete gear teardown and rebuild (which I still have not decided to do), one is supposed to be able to rotate the MC gear CW (which I presume is taken to mean "CW as viewed from the rear"), until it hits a stop point and then, back up to the nearest notch which should correspond to 0.000.  My presumption is that if I back off to the 3rd click, that should correspond to 2.XXX and rotating the KC shaft should eventually get the gears (and cams) in the 2.000 position.

I found that there is something that causes a "stop" at full CW and full CCW.  I think that stop is happening as a function of the Geneva mechanism and not the 10-turn stops (which aren't engaged when the RF deck is removed); however, CW or CCW still won't let me get the gears/cams in their proper setting and am wondering if I'm now truly "stuck".

Any help is appreciated.

Additionally, to avoid getting the transformers' cores wet, I'm removing the slug racks and transformers while cleaning the gears and, right off, I found that one of the slugs (for Z2223) was broken.  I'm sure that didn't help performance any.  I have it CA glued back together so that should help when I get this all reassembled.

Thanks again,
Barry - N4BUQ