Thane Heins Perepiteia.

[hoptoad]

My failed monster was also, incredibly long heel.

Obviously something was wrong with your monster, else it wouldn't have failed. 
Wrong diet perhaps. 

P.S Have you heard the expression.... All things in moderation

Cheers

[aether22]

Obviously something was wrong with your monster, else it wouldn't have failed. 
Wrong diet perhaps. 

P.S Have you heard the expression.... All things in moderation

Cheers

Toads mostly, I tried to stop him honest!

Most likely either the core supports too much 'low voltage' current or it has too much non induced impedance.
And yet I have little confidence in either theory.

But I got the MOT cores done (mostly) and so should get stuff going in the morning. (hopefully this weekend will be the one I actually have some free time)

[LarryC]

Well I rang around appliance repair places, got 2 free ones and another place happy to sell me them for $25 a piece.
I won 2 in online Auctions (not yet picked them up and unless I brick one of these may not need to) for $2 and $10. (both had faults but neither sounded like the HV transformer)

Another is in your kitchen, they are very bad for your health and that has been proven, kill it and use it's parts.

Finally I am not sure if they have them everywhere but in Auckland anyway there are 'inorganics' which is once a year everyone puts out stuff like old electronics, sofas, fridges and other general junk. if you spot one then you can pick up some microwaves. (However when I tried this once I found that the transformers had already been removed by scavengers trying to sell the copper, but still a diode and HV cap if of use possibly, mainly though I was trying to scavenge flybacks at the time)

BTW I have had to stop since my angle grinder has ended up grinding it's self so much that the disk no longer cuts deep enough, so as the disk costs almost as much as a cheapie grinder I may as well get a second one with guard on, makes sense to have one on and one off for when the guard gets in the way.

Thanks, I'll check some of the sources out.

Don't have a grinder, but I've used a reciprocating saw with a metal cutting blade, after getting the cut started with a hacksaw. Don't think it would work well on the welds, but good on the laminate.

Larry

[i_ron]

But I got the MOT cores done (mostly) and so should get stuff going in the morning. (hopefully this weekend will be the one I actually have some free time)

I have a little proceedure for mot cores.... use a 3/64th Zip cut blade, hold the core in a vise with a
piece of sacrificial angle iron positioned over the weld so as the thin blade rersts on the angle iron as a guide to exactly groove the weld.

Do both welds then strike the weld with a chisel and the "I" section will pop off.

With the core in the vise pry up on all four corners of the primary to break it free and it should lift off. Remove the two shunts and take out the heater winding (the 3 or 4 turn coil) The secondary can be slid off the core at this point... with some difficulty...put it over two blocks and drive the core down out of it. (Remove the ground wire rivet or grind it off, first)

With the core free, use a power metal cutting band saw to cut the legs off. Note that the saw will also pull or loosen the laminations so have a piece of scrap metal clamped on each side of the cut.

When reinstalling the coils use a thin wedge to hold the coil in place or just gaffer tape it to the core.

You get a nice pre-wound coil but the core area is rather large for this application.

Ron

[i_ron]

Lord Thane, of the hill

Well I redid my set up... new open rotor, cup magnets and a wooden base.



At somewhere around 3K RPM it will accelerate when both mot secondary coils are shorted in series.

Note the 'proper' pot magnets with a 1/16th plastic spacer around the magnet?

Ron

The funny thing on the stick is my rpm coil, lol