Eddy -
Yes, the yoke is directly connected to the slug, and therefore very susceptible to ANY movement.
This is the reason for the spring to the shield can, i.e., keep everything 'solidly' engaged. Maybe
just a weak spring? It should take a definite effort to stretch the spring to hook it. Also any
dirt or corrosion on the rider bar can cause 'bumps'. It should be 'clean and dry'..........
73, Garey - K4OAH
Glen Allen, VA
Drake 2-B, 2-C/2-NT, 4-A, 4-B, C-Line
and TR-4/C Service Supplement CDs
<www.k4oah.com>
Eddy Swynar wrote:
Hi Guys,
To-day I had occasion to take the top cover off of my T-4X transmitter,&
examine the PTO mechanics a bit...
Question: how "normal" is it for the frequency to "jump& jiggle" whenever even the
lightest of physical force is applied to the yoke...? Is this expected, or should the frequency stay put no
matter what, i.e. there should be no "slack / sloppiness" in the assembly...?
I noticed a bit of "play" in the yoke of my PTO---enough that if I applied even just a
modicum of pressure from a wooden chopstick, I could "jiggle" the frequency. Does this
indicate that something is, indeed, loose in mine& in need of tightening, or all they all like
this...?
The jiggle in my PTO sounds a LOT like the jiggle than I can induce with manual
pressure---maybe the key to our woes in this regard has a MECHANICAL solution,
rather than an electronic one...?
I'm gonna remove the PTO cover,& the circuit board itself, as my next step. Maybe I'll
be able to see something therein that requires "tightening"...I don't know.
~73~ de Eddy VE3CUI - VE3XZ
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