[R-390] R-390/A

[Larry H]

Hi Gerd,  If the slugs are moving freely in the forms, I don't think they are squeaking. I've not seen 1.  To check if they're free, set the rack to a low point and manually raise it up and down.  Or, to do an individual one, remove the 2 retainer screws.
It's probably the rack rollers or the rack is pressing too hard on the side of the frame.  A lot of times the rollers don't turn freely, so you can check for that.  If the rack is pressing hard on the frame, sometimes adjusting the core retainer positions can help or check the rack for being bent.  One other possibility is that someone replaced a spring and it is too strong or weak (imbalanced pull on the rack).
One tool I use to pinpoint squeaks is a stethoscope with the pickup removed.  Move the hose around to locate it.  
These can be tough. Good luck.
Regards, Larry

      From: "gs at oaft.com" <gs at oaft.com>
 To: R-390 at mailman.qth.net 
 Sent: Thursday, February 11, 2016 8:13 AM
 Subject: [R-390] R-390/A
   

gear cleaned OK , tried to "silence" the SLUG Rack -  it is squeaking  
when turning the Megacycles -  but no success. Most probably the slugs  
are squeaking  between Z 203 and T 203.
Dont dare to lub the Slugs and would like to avoid dismantling the whole rack.

Any ideas ?  tnx


73 gerd  OE3GSA


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