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Model 60 Power Transformer
#12

Thanks, Arran.The resistances on either side of the high voltage center tap were 169/151 ohms but, as noted, the voltages were identical.  The transformer was stone cold after 10 or 15 minutes of operation.

I spent some time preparing questions about the apparently open coil before I pulled the antenna transformer, but I decided to try to work it out myself.  And I did.  

With the transformer on the bench I still couldn’t physically identify the offending coil until I had some photos.  Then it was a matter of excavating wax to follow the wires (I‘m sure you‘ve all been there).

[Image: https://c1.staticflickr.com/5/4184/34454...96d3_z.jpg]

When I found the coil, it appeared to be intact before removing the wax.  It’s puzzling how the wire could break at this point--there was no oxidation and the wax appeared to be unmolested.

[Image: https://c1.staticflickr.com/5/4168/33685...f330_z.jpg]

But it was broke, and I did fix it.  

Here’s my lesson of the week:  The transformer covers are riveted to the chassis.  Two days ago I cut the rivets to remove the cover so I could remove the transformer.  Just a few minutes ago I realized that I didn’t need to remove the covers at all--I could have pulled the transformer through the chassis instead.  Duh!

- Henry


Messages In This Thread
Model 60 Power Transformer - by Winky Dink - 05-04-2017, 02:18 AM
RE: Model 60 Power Transformer - by Radioroslyn - 05-04-2017, 07:32 AM
RE: Model 60 Power Transformer - by morzh - 05-04-2017, 08:14 AM
RE: Model 60 Power Transformer - by winkydink - 05-04-2017, 08:21 AM
RE: Model 60 Power Transformer - by Winky Dink - 05-04-2017, 09:34 AM
RE: Model 60 Power Transformer - by Winky Dink - 05-04-2017, 09:38 AM
RE: Model 60 Power Transformer - by morzh - 05-04-2017, 10:20 AM
RE: Model 60 Power Transformer - by Radioroslyn - 05-04-2017, 10:54 AM
RE: Model 60 Power Transformer - by morzh - 05-04-2017, 11:21 AM
RE: Model 60 Power Transformer - by Winky Dink - 05-04-2017, 08:20 PM
RE: Model 60 Power Transformer - by Arran - 05-04-2017, 09:49 PM
RE: Model 60 Power Transformer - by Winky Dink - 05-06-2017, 07:46 PM



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