Re: [TCML] Pre-Launch Prep Procedure

[Gary Lau <glau1024@xxxxxxxxx>]

Yes, very clear, not at all subtle!

On Tue, Jul 23, 2013 at 1:37 PM, Mike Gray <graymp89@xxxxxxxxx> wrote:

> Gary, is it easy enough to see when the luminous output of the lamps is at
> a peak?
>
>
> On 20 July 2013 22:16, Gary Lau <glau1024@xxxxxxxxx> wrote:
>
> > H All,
> >
> > Yes the referenced lamp is the type that I used.  While I initially
> > soldered connections to the bulb ends, I was concerned with the
> possibility
> > of the lamp's heat melting the solder and coming loose.  I've since
> > constructed a wooden board with some spring steel sheet metal contacts
> that
> > press against the lamp's dimples as was intended.  An image of the dummy
> > load board can be seen on page 10 of this document:
> >
> >
> https://docs.google.com/file/d/0B0afsm3K5nFYNGQ3MmJlZGEtYjQ5My00OTJhLTkwNDMtOWEwMjRkYWJkZjAy/edit?usp=sharing
> > As the lamps will radiate a LOT of heat, I lined the board under the
> lamps
> > with aluminum foil to reflect the heat, being careful not to get the
> > conductive foil too close to the spring steel contacts..
> >
> > The lamps should be used instead of the primary, not in series with it.
> >  Having the primary in series with the lamps might kinda work, but there
> > would still be a good deal of RF oscillations, damped by the added
> > resistance of the lamps.
> >
> > Regards, Gary Lau
> > MA, USA
> >
> > On Sat, Jul 20, 2013 at 2:07 PM, Brandon Hendershot <
> > brandonhendershot@xxxxxxxxx> wrote:
> >
> > > Mike,
> > >
> > > I've just had a look over the archives, and from what I've read I'm
> > pretty
> > > > sure that my issue lies with the SRSG firing timing. I came across a
> > post
> > > > from Gary Lau saying that he uses 500W halogen bulbs as a dummy load,
> > and
> > > > tunes his SRSG for max brightness. I think I'll run with this idea,
> > along
> > > > with building a Freau phase adjuster circuit to adjust the phase more
> > > > accurately. Do others use the halogen bulb dummy load? Is there
> > anything
> > > I
> > > > need to be aware of before attempting this?
> > > >
> > >
> > > Good choice on the phase controller. I use a dummy load identical to
> > Gary's
> > > and as far as I can tell it works great. Something I misunderstood
> > though,
> > > make sure that the load goes in 'series' with the primary, not in place
> > of
> > > it. I thought it replaced it entirely, which apparently wasn't the
> case.
> > >
> > >
> > > > Clearly the halogen dummy load will experience the full 10kV output
> of
> > > the
> > > > NST - so I presume they're capable of withstanding high voltages?
> Would
> > > > this bulb be suitable?
> > > >
> > > > http://www.bltdirect.com/product.php?pid=411&cat=56
> > >
> > >
> > > Those are the exact type of bulbs I'm using. Go ahead and get spares,
> > they
> > > can be rather 'cheap' when you get them for cheap. I'm running with 3
> at
> > > 15kV (120mA) so you should be able to get away with just two bulbs in
> > > series (unless the design states otherwise).
> > >
> > >
> > > > Cheers
> > > >
> > > > Mike
> > >
> > >
> > > Good luck
> > >
> > > Brandon H.
>
>
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