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How transformers are made

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In Reply to: RE: They were all David Hafler's patents... I assumed he did some of the work too~nT posted by Cleantimestream on August 14, 2022 at 07:39:09

My father was a foreman in a shop that made transformers. This is how a transformer was made back then. And yes, many of those transformers were for audio use.

1-You gave your specs to the engineers at the shop.

2-You approved the design plan

3-They built a run.

4-Minor changes if needed on the line.

I worked at the factory a few summers so I not only know how they're made, but I've actually made them.

Making a transformer is a very time and labor intensive process. The setup, large building space, raw materials, QC testing and labor cost would make this process impractical for anyone except a factory.

Follow Ups:

RE: How transformers are made - Cleantimestream 03:04:23 08/20/22 (0)
Gosh, I sure was I was around him back in the day ... I would have been tugging on his coat every chance I got!
The Mind has No Firewall~ U.S. Army War College.
While walking through one of the electronic districts in Taipei, I saw - alaskahiatt 20:22:06 08/17/22 (2)
a small transformer shop and a guy appearing to hand wind transformer coils. Sorry I didn't have a small camera in those days, but these type of small electronic shops were not unusual in Taipei and Hong Kong.
- RE: While walking through one of the electronic districts in Taipei, I saw - airtime 07:19:18 08/18/22 (1)
  The entire construction of a tranny is a hands on process. It's a spool of wire with a simple length counter. A person HAND cranks the tranny to wind the wire on a core.
  
  The entire process is virtually ALL done by hand. Even today. That's why if Dynaco was making their own tranny's they would have to buy a large building because it would take about 50 or more people, in separate areas, to make all those tranny's.
  - RE: While walking through one of the electronic districts in Taipei, I saw - Tre' 07:25:56 08/18/22 (0)
    I believe Acro made their own transformers.
    
    Tre'
    Have Fun and Enjoy the Music
    "Still Working the Problem"
    - https://www.technicalaudio.com/pdf/Acro_Products_AcroSound/A (Open in New Window)
maybe you can help this guy - Story 07:20:13 08/17/22 (0)
see linky. He has a Panor Dynaco PAS-4 preamp, lives in Canada, and needs help hooking his preamp to his native power. The inside says 240vac but the back panel has markings for different voltages, 240 & 120

It looks like there are different taps on the primary, but it also looks hard wired
- https://www.audioasylum.com/forums/amp/messages/24/246038.ht (Open in New Window)

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