On 2009-01-18 13:25:23 -0800, "BobW"
said:


"Admin" wrote in message
news:2009011813063650073-sowhati@comcastnet...
On 2009-01-17 21:56:27 -0800, "BobW"
said:


"Admin" wrote in message
news:2009011720334016807-sowhati@comcastnet...
On 2009-01-17 14:23:39 -0800, "Michael A. Terrell"
said:


Eeyore wrote:

mark krawczuk wrote:

hi, i dont think anything interesting is a waste of time

Yes, plenty are. Such as things that are known NOT to work.

Graham


Like old donkeys?

Well, it is working now. The 120 V zener was faulty.
Thanks to all the helpers. Pie in the faces of the negative nay-sayers.
See ya.
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Congrats! That would make sense.

I'd still like to see how it works with that zener shorted out.

Bob

Bob,

I removed both diodes. With the zener shorted I still got problems: the
current was extremely low. So I removed both.
--


Hmmmm. I'm confused. The purpose of the top diode(s) is to give a path for
the stored inductor (transformer) energy when the fet is turned off in such
a way that the fet's drain voltage doesn't get too high.

Can you post the circuit again as it is (i.e. working)?

Bob

Here you go:


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