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Old 24th Nov 2017, 11:15 am   #3
Argus25
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Join Date: Oct 2016
Location: Maroochydore, Queensland, Australia.
Posts: 2,679
Default Re: NZ made ZC1 MK2 Radio.

Quote:
Originally Posted by Keith View Post
I have recently refurbished a non-synchronous vibrator from a British R209 receiver and was astounded at the contamination by the rubber packaging compound.
Keith - G3XGW
Keith, yes the rubber seems to degrade over time. I noticed that when it becomes liquid and tacky it deposits out on the contact surfaces. Then the contacts become insulated and stick together. When I restore these units I get rid of the original rubber. The melted rubber is also quite corrosive. Melted latex appears to attach aluminium in some cases too. The vibrators, when they are set up correctly with clean contacts do work well though. It always takes a scope to get the contacts perfectly adjusted.

I like your number 19 set !
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