Re: Expensive hobby

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: "Paul B. Brodie" <pbbrodie@xxxxxxxxxxxxx>

John,
Thanks. I didn't even think about the motors for rotary spark gaps. I don't 
know how I let that slip by me. He has a bunch of older washing machines 
and I feel sure that there will be some really nice motors in some of them. 
Unfortunately, from personal experience, I know that failed motors are the 
most common failure of washing machines. Dang!!! I'm sure I'll find at 
least one good one. One problem with the washing machines is they aren't as 
easy to pick up and bring home to disassemble. At least my lovely bride 
says I can use her pickup truck. That certainly helps.
Paul
Think Positive

PS Excuse me. I know what doubler power supplies are but I'm not familiar 
with "level shifted" power supplies. Will you please enlighten me? Thanks.

----- Original Message -----
From: "Tesla list" <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx>
To: <<mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx>
Sent: Monday, April 18, 2005 9:23 PM
Subject: Re: Expensive hobby

> Original poster: <mailto:FutureT@xxxxxxx>FutureT@xxxxxxx
>
> In a message dated 4/18/05 7:10:52 PM Eastern Daylight Time,
> <mailto:tesla@xxxxxxxxxx>tesla@xxxxxxxxxx writes:
>
>
>>He went in the back and came out with these 2 honker MOT's that he said he
>>took out of the biggest, most powerful, commercial microwave he has ever
>>seen or heard of. He said they were both in the same microwave and that it
>>was rated at 2500 watts! He then took us out back and showed us 9
>>microwaves that he said we could have. He also said that if I want to
>>scrounge parts out of old TV's, washing machines, refrigerators, stoves,
>>dryers, or whatever, just let him know. The first microwave I opened has a
>>4000 V transformer and is rated 1500 watts. They all have the HV AC caps,
>>of course and Peter Terren tells me that I will find all kind of HV goodies
>>in the newer microwaves, like HV rectifier bridges and such.
>
>
> Paul,
>
> Nice finds.  Be sure to save the MOT diodes for making level-shifted
> (doubler) type power supplies.  Washing machine and dryer motors
> are good for certain rotary spark gap designs.  Unfortunately the
> newer motors are difficult to disassemble to modify them to
> make them synchronous.
>
> Cheers,
> John Freau
>
>