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Old 19th Mar 2021, 8:51 am   #24
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Join Date: May 2009
Location: Linkoping, Sweden
Posts: 1,282
Default Re: AVO 163 amp board ~ transformers

Originally Posted by Radio Wrangler View Post

Primary and secondary windings seem to be the same gauge of wire from Martin's photos.
Did some quick measurements with my caliper and it shows 0.15mm wire on the high ohm side and 0.3mm on the low ohm side, the thicker wire is wound closest to the center. (

Originally Posted by Radio Wrangler View Post
No mention of inductance or saturation current level is made. It would be easy to design a transformer that met those specs but which wouldn't work in the actual application. So I think that isn't really a spec, but just some tests to see if a transformer has failed for repair purposes.

The information is from documents called "Test specification for oscillator output transformer" and "Test specification for amplifier input transformer" and these were used for checking of manufactured transformers so they adhered to manufacturing specifications.
Martin, Sweden
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