[R-390] Fix for ZERO ADJ.

[Tom M.]

 Ken,
Are all the panel screws present and tight?  They have to be to press in the clutch.  Also, is the zero adjust actually pressing in the clutch? If it is and the clutch plates are not slipping you might get them to release and slip by dropping a little oil on the clutch plates.  If the clutch plates are dry then they won't slip at all and the mechanism won't work as designed.  

Tom

    On Friday, March 1, 2019, 1:12:11 PM CST, K PERALES <kenperales at comcast.net> wrote:  
 
 Has there been anything written about repair of the ZERO ADJ., when it does not seem to release the clutch to zero the kHZ dial setting.  I am off from 1 to 3 kHZ over the full range of 0 to 32 MHz which is probably more than just the zero adjust but I cannot do even the basic adjustment on any calibration point from top to bottom.  Looking down inside the front panel, I can see shaft turning and as it gets close to the stop point turning clockwise, I can see what I assume is the clutch plate just barely moving.  I have looked through many of the instruction manuals I have but seen nothing about repairing the ZERO ADJ.  I am guessing that someone out there has repaired this at some point.


Ken Perales

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