[R-390] Sticking R-390A clutch plate.

[Scott, Barry (Clyde B)]

I had a problem with my clutch and ended up disassembling it, cleaning it, and reassembling it a couple of times.  You will probably find it is old grease/lube causing the problem.  If I recall, I found it best to leave it dry, or just a tiny bit of oil -- not grease.

I don't think you have to pull the RF deck.  You have to drop the front panel, and remove the counter and a few other odds and ends, but it's not a bad operation.

Good luck,

Barry - N4BUQ
> 
> Hello all.
> Perhaps a month ago I had the RF deck out of this '67 EAC and very
> thoroughly cleaned the gear train and cam assembly. I didn't tear the
> gear train down as I didn't feel I wanted to go that far.  The entire
> mechanism is very 'free' and easy tuning.
> 
> In use though, I have noticed a problem with the Zero Adj 
> clutch.  If I
> haven't adjusted the Zero adjust for a couple days, when I 
> crank down the
> knob (to release the clutch) and then tune the KC knob the 
> clutch sticks
> or drags the Veeder Root counter off Zero until it "breaks 
> free" and then
> it's ok and good to go for future adjustments.       
> 
> I 'suspect' that old grease and grime may still be lurking on 
> the clutch
> plate and that's causing the problem.  Is there a way to clean this
> critter WITHOUT having to remove the RF deck again and 
> disassembling the
> gear train?   If I have to go through that I'll probably just 
> live with
> it until the next time I have cause to do a teardown (the 
> receiver is in
> daily use).
> 
> 73 de Phil  KO6BB
> Loving home provided for wayward Boatanchor Receivers.
> R-390A '67 EAC.  HALLICRAFTERS SX-71 ('53) & 5R10A ('53).
> REALISTIC  DX-160 ('78).  HOMEBREW  Longwave CW receiver.
> Merced, Central California, 37.18N  120.29W  CM97sh.
>