Re: A prospective s.s.t.c. input-synchronizer (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

Original poster: Gerry Reynolds <greynolds@xxxxxxxxxx>



---------- Forwarded message ----------
Date: Mon, 18 Dec 2006 08:42:47 -0800
From: K. C. Herrick <kchdlh@xxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: A prospective s.s.t.c. input-synchronizer (fwd)

Yes, the email to hot-streamer.com was returned with a "No such user 
here" advisory.  I'll try again.

Before I tear it all apart, I will look further to see if I can find out 
where the crud is getting in.  But it's pretty bad: as soon as I turn up 
the variac on the H-bridge more than moderately, I get lots of spurious 
signal all over the place in the low-level circuits, as if the 
wire-wrapped circuits are acting like a zillion antennas.  As I had 
belatedly remembered, I'd had the same kind of problem with my prior 
s.s.t.c. primary apparatus, requiring ultimately that I put all the 
low-level stuff inside a box -- and also, incorporate a bifilar choke or 
2 in the power-input circuits.

...and sure enough, I did leave out the .com.  Me bad!

KCH

Tesla list wrote:
> Original poster: Gerry Reynolds <greynolds@xxxxxxxxxx>
>
>
>
> ---------- Forwarded message ----------
> Date: Mon, 18 Dec 2006 02:04:05 -0600
> From: Steve Ward <steve.ward@xxxxxxxxx>
> To: Tesla list <tesla@xxxxxxxxxx>
> Subject: Re: A prospective s.s.t.c. input-synchronizer (fwd)
>
> Hi Ken,
>
> The links dont seem to work for me, even after fixing the
> hot-streamer.COM (many of your past links forgot the .com part).
>
> Anyway, what is the issue with un-shielded low level electronics?
> Many of my DRSSTCs run unshielded as the low level stuff is all 5V
> logic, which is pretty hard to "mess up".  I'd at least try making
> some small sparks before assuming that shielding is a problem, it may
> be just fine as-is (unless you have some reason that noise is a
> problem here).
>
> Good luck!
>
> Steve Ward
>
> On 12/17/06, Tesla list <tesla@xxxxxxxxxx> wrote:
>   
>> Original poster: Gerry Reynolds <greynolds@xxxxxxxxxx>
>>
>>
>>
>> ---------- Forwarded message ----------
>> Date: Sun, 17 Dec 2006 16:10:33 -0800
>> From: K. C. Herrick <kchdlh@xxxxxxx>
>> To: Tesla list <tesla@xxxxxxxxxx>
>> Subject: Re: A prospective s.s.t.c. input-synchronizer
>>
>> While the circuit I posted previously,
>> http://hot-streamer/temp/tch-synctest2.jpg, worked in simulation, it
>> didn't want to work in the hardware.  So here's an improvement that
>> does: http://hot-streamer/temp/tch-synctest4a.jpg.
>>
>> So far, tho, no sparks: I now have to saw apart my drive electronics and
>> shield the low-level part.  That's something that I learned the hard way
>> "way back when" but then forgot...dummy that I am.
>>
>> KCH
>>
>>
>>
>>     
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