Some thoughts on how the TPU might work.

[Grumpy]

more winding

[BEP]

Hi Newton

Would you happen to know anything about the failure in the GE circuit's??

http://en.wikipedia.org/wiki/X-ray_tube#Hazards_of_X-ray_production_from_vacuum_tubes

M.

Now THAT IS a good find! Thanks Marco!

[Newton007]

Some how my last post was lost about TVs, said data base failure. Any way The TV question about GE color TVs. No I don't know about the GE failures and here is where I first learned about them exploding.

I worked mostly on BW sets. I worked mostly on RCA color sets. Like the GE sets there were X ray scares with all Color sets to some degree. How much of this was real and how much just newspaper hype I don't know. But I am still alive so I guess I did not get much exposure.

One thing you have to remember about these early color TVs is they were driven hard and the power supply's were almost maxed out, both the DC and the high voltage. The tube power supply's were failure prone. Later sets used selenium rectifiers which were not much better except that you could always tell when they were burnt up because of the odd smell they had.

A high voltage rectifier tube 1B3 was the "X ray"  tube when driven hard. The B+ on these multiple power supply's was always low which caused all kinds of problems with their operation. They would pop a 15 amp house breaker some times. 20 amp was better.
When they told the kids to stay away from the screen it was, in retrospect a good idea.
At the time I thought it was silly, but now I don't. The last time I worked on a TV was 1968 so I am a little fuzzy on some of this.

I hope this helps.

Newton

[slapper]

LC values for 7.3 Hz are around 475 microFarads with a 1 Henry coil - is using a cap cheating?

I'm curious about this one as well.

[Grumpy]

"bump"