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Tim · 7th Jan 2021, 11:32 am

Hi all.

For some reason I have never had a go at making or re-winding transformers, but
have seen some other people doing it on u-tube so decided to have a go.
I have a couple of donor transformers that I can re-purpose. It looks reasonably straight forward once one gets ones head round the maths( never been my strong point)

Just a couple of questions though

One transformer I want to re-wind is for an Oscilloscope. One winding is 950 volts, which then gets doubled for the EHT.
This seems to be a problem area in other scopes using the same techniques from the same manufacturer.
I’m thinking of re winding the transformer without this winding, and making a dedicated tx just for the 950 volts.
Is this worth doing?

It doesn’t need to be big as required current is very small. That creates problems in itself of course. I could make it bigger to aid cooling but then my losses might be more than the actual power used.
Guidance please!

7th Jan 2021, 11:32 am	#1
Tim Dekatron Join Date: Jan 2003 Location: Bradford on Avon, Wiltshire, UK. Posts: 3,310	Home made transformer Hi all. For some reason I have never had a go at making or re-winding transformers, but have seen some other people doing it on u-tube so decided to have a go. I have a couple of donor transformers that I can re-purpose. It looks reasonably straight forward once one gets ones head round the maths( never been my strong point) Just a couple of questions though One transformer I want to re-wind is for an Oscilloscope. One winding is 950 volts, which then gets doubled for the EHT. This seems to be a problem area in other scopes using the same techniques from the same manufacturer. I’m thinking of re winding the transformer without this winding, and making a dedicated tx just for the 950 volts. Is this worth doing? It doesn’t need to be big as required current is very small. That creates problems in itself of course. I could make it bigger to aid cooling but then my losses might be more than the actual power used. Guidance please! __________________ "Nothing is as dangerous as being too modern;one is apt to grow old fashioned quite suddenly."