[CW] Stuttering Dots on Vibroplex - Info from Two Experts, Frank W7IS and Jim W0EB

[Joe Pontek Sr]

I have to wonder why you are concerned about what a contact is
doing in the open position?  When a contact swings to the closed
position, you have to be concerned with two things.  Contact over
travel and contact wiping.

If there is no over travel, it is susceptible to light contact, poor or
no wiping and possible scratchiness.  When the contacts separate,
it should wipe open.  Once clear, there is no effect on the next
contact closure.

The damper is just a soft stop which it easier on parts, all the way
to the pivot and bearing pins/screws.  If you have a wider dot bar
swing, ie. slower speed ranges, you will have a stronger contact with
the damper, over travel.  It the steady state, the weight bar should
just contact the damper. The damper only effects to dot bar's stop,
not the dot spring contact.

Yes, I have tried all the dot spring tricks, dental floss, sponge wedge,
and the wire damper to hold the spring.  In technical field, we call
this pretensioning. Out of all the bugs I have worked on, I have had
to replace two actual contacts that were either burned or filed beyond
repair.  I had to replace one dot spring, I think it was heated, maybe heavy
current run through it.  The contact was fine, but?

There are simple basic adjustments for bugs and if properly used, they work
without stuttering  They need to used vigorously, but with proper good 
rubber
feet will not move about on a smooth flat surface.

73, Joe, K8JP/K5--

Regards, Joe, K8JP/V31JP, Ronnie, Martin & Sidney Pontek
175 Diamond Loch Rd., Apt. 5
Gilmer, TX 75644-9374
U.S.A.
or
P.O. Box 280, Dangriga, Stann Creek District
(Hopkins Village) Belize

903-204-2318 (My TX cellular)
903-884-5990 (Skype telephone number, Belize & TX)
Also, K8JP, member FOC-1743 Feb 2001, QCWA-LM21894, OOTC-4607, A1OP, SKCC-3171T, NAQCC-5798, Flying Pig-2819, FISTS-7625CC951, A1C-2299, SOC 1075, CFO, 10-10 22977, PG1915841, CW Rag chewers #21,
Facebook: Joe Pontek
Skype: v31joepalooka
LotW

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