Re: deceptive transformer

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: Matthew Smith <matt-at-kbc-dot-net.au> 

Tesla list wrote:
>Original poster: "Hydrogen18" <hydrogen18-at-hydrogen18-dot-com>
>No, please dont say it's so! They even put switching psu's in MO's now? Are
>the magnetrons designed for the HF also?
Fear ye not, Eric.  Once you get your head around switching supplies (it 
took me a while), you'll be greatful.  The power handling per pound of core 
is much greater when you start using higher frequencies.

Even so, "Traditional" MOs will be with us for some time.  You don't only 
have the ones still in production, but also all the ones out there in 
kitchens, just waiting to die and be reclaimed.  I can't see us running out 
of MOTs at any time in the near future.

Personally, I'm looking forward to getting my hands on some decent sized 
cores -  preferably ones which can take a decent (100kHz or so) switching 
frequency.

 From Mike's comments:

>That's not gonna help the price either with mots going extinct. Anyone try 
>making a dc resonant coil with one of those inverter supplies yet? Freq is 
>probably way too high to make the usual ac coil practical (no 50,000
 > bps caps to be found).

This could be a good incentive for more work on DC coils if we suddenly 
find ourselves swamped with a load of high power/voltage SMPSs.

I think we could have some interesting experiences regarding the 'hot' side 
of these SMPSs - we may well find that the output diodes and caps are 
totally unsuited to the harsh TC environment.  We may have to use something 
like a "Terry Filter" between SMPS and the tanks circuit, rather than 
having the normal filter cap as the main TC cap.

There's a lot of learning to be done and, personally, I find it rather 
exciting.

Cheers

M


-- 
Matthew Smith
Kadina Business Consultancy
South Australia
http://www.kbc-dot-net.au