17-07-2023, 09:06 AM
Trevor,
I have been rewinding and making transformers for more than 50 years.
Dad taught me. SMALL transformers, not power distribution, but I do know about them.
I know nothing about TV anymore ( I have never really been interested in the first place ),
and my current TV is a computer. Analogue TV disappeared from Australia years ago.
I did cut my teeth and learn my valve theory way back in time when black and white was the ONLY TV standard available.
I mostly watch my computer TV on youtube, apart from the ABC news.
I do pay a couple of movie channels for the wife to watch.
So, to dissmantle, count and analyse the layer configuration of even the simplest transformer is not easy.
IF its been burnt ( overloaded ) its even worse and very messy.
If its Quad style, potted in bitumen, its a truly horrible job.
For some reason, that bitumen ends up on the car 200 yards away from the rewind area,
without having any contact with the car. ????
Then calculate the gauges, insulating layers, ( and old english traffos could be particularly frenetic in construction )
Layering, and then waxing ( common ) bitumen dipping, ( average cheap traffo ) varnish dipping without vacuum , then the hardest of all, vacuum impregnated,
then baked.
There are also PCB ( polychlorinated biphenyls ) filled mil spec stuff left over from some previous time, and in big stuff, oil filled.
ALL very tedius for anybody that has done it. Its NOT very inspiring.
Just my observation Trevor.
Joe
I have been rewinding and making transformers for more than 50 years.
Dad taught me. SMALL transformers, not power distribution, but I do know about them.
I know nothing about TV anymore ( I have never really been interested in the first place ),
and my current TV is a computer. Analogue TV disappeared from Australia years ago.
I did cut my teeth and learn my valve theory way back in time when black and white was the ONLY TV standard available.
I mostly watch my computer TV on youtube, apart from the ABC news.
I do pay a couple of movie channels for the wife to watch.
So, to dissmantle, count and analyse the layer configuration of even the simplest transformer is not easy.
IF its been burnt ( overloaded ) its even worse and very messy.
If its Quad style, potted in bitumen, its a truly horrible job.
For some reason, that bitumen ends up on the car 200 yards away from the rewind area,
without having any contact with the car. ????
Then calculate the gauges, insulating layers, ( and old english traffos could be particularly frenetic in construction )
Layering, and then waxing ( common ) bitumen dipping, ( average cheap traffo ) varnish dipping without vacuum , then the hardest of all, vacuum impregnated,
then baked.
There are also PCB ( polychlorinated biphenyls ) filled mil spec stuff left over from some previous time, and in big stuff, oil filled.
ALL very tedius for anybody that has done it. Its NOT very inspiring.
Just my observation Trevor.
Joe
