THOR's strike rail: how to?

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

Original poster: "Marco Denicolai by way of Terry Fritz <twftesla-at-qwest-dot-net>" <marco.denicolai-at-tellabs-dot-com>

Hello all (again),

As you have maybe read, I came to the conclusion that Thor's strike rail
arrangement needs some modification. I had last week a streamer hitting
the primary, with catastrophic effects on one of the CCPS drivers. That
wasn't exactly a nice thing...

You can see my strike rail + primary at

http://www.saunalahti.fi/dncmrc/thorpict.htm

Relevant dimensions are as follows (in mm):

Primary Height (Inner Turn) = 0
Primary Inner Diameter = 600
Primary  Outer Diameter = 1100
Strike Rail Height = 150
Strike Rail Diameter = 1300
Secondary Base Height = 200
Secondary Diameter = 400

I can see three solutions, or a combination of them:

1. Create a small protuberance on the toroid to originate all streamers
from a known place. I had for a long time a copper bar sitting on the
toroid: never got a streamer getting to the wrong place

2. Vary the strike rail dimensions, height, shape. I have a preatty wide
area to shield and I don't like the secondary to arc to it. Seems a not
so easy task.

3. Place a 20 mm thick PVC disk (actually, two half-moon sections bolted
together) with some spacers to sit on the top of the primary (maybe at a
realtive height of 100 mm). Easy to do, also because I don't need
frequently tuning. Question: would the lost streamers then hit the
secondary base ?

What is your opinion? Please, let me know.

Regards


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 Marco Denicolai           Senior Design Engineer 
 Tellabs Oy                tel: +358 9 4131 2769
 DSL Products              mobile: +358 50 353 9468
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