Re: [TCML] Pre-Launch Prep Procedure

[Gary Lau <glau1024@xxxxxxxxx>]

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.
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxx
> http://www.pupman.com/mailman/listinfo/tesla
>
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla