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Old 21st May 2019, 9:47 pm   #1
Join Date: Sep 2007
Location: Ranfurly, New Zealand
Posts: 132
Default AVO VCM MkIII repair

I;ve got a MkIII AVO valve tester on the bench for repair and have discovered one of the 3 coils on the protection relay is open circuit. Before I contemplate the thought of removing the offending coil for rewind , does anyone know where I can get a complete assembly or even a replacement coil?
I have attached a photo of the relay assembly - and the resistances measured are noted below............
A - B O/C
C - D 5 ohms
E - F 228 Ohms
E - G 0.5 ohms

I would expect the O/C coil between A & B to be the same as E - F i.e. 228 ohms or thereabouts.
Any thoughts?
Thanks Mike
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