Re: Bush TV22 restoration
Keith,
Most vertical blocking oscillators are in the range of 1:1.5 to 1:4 ratio. American sets favored a close to 1:4 ratio. These small transformers are readily available on US ebay too.
If you did use one with a higher ratio, it is necessary to reduce the value of the associated time constant capacitor.
In the case of the TV22, I think it is best to do what you are doing and attempt a rewind of the existing transformer stack. You can fashion a new bobbin for the stack fairly easily, that way when its finished it will look more original than any substitute transformer.
It is quite a lot of fun winding small transformers. I set up a small lathe with an electronic turns counter to wind such items. Picture attached.
Hugo.
Last edited by Argus25; 3rd Feb 2018 at 6:53 am.
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