RE: [TCML] Spark gaps (again)

["Jim Mora" <wavetuner@xxxxxxxxx>]

Hi Gary,

No, Sorry,

I never scoped the TC in operation. It was tuned by a scope though. I have
the air blast gap and the nozzle for loan that was used if someone wants to
nearly duplicate the setup. My scope is an older 60Mhz dual trace. If I ever
get some extra cash again, I would like to acquire a storage one or a pc
acquisition setup!

It has since been torn down in favor of a 12" and pig (work nearing
completion ASRG); and, since it is on topic, I was considering a DC charged
coil but was up against the wall with said charging coil.
I do have a 3p 24KV out 6 pulse 8020 Tube supply with a 400H choke internal
made by Raytheon...Now that will be interesting... Later days...

The coil was 8.25" wound 35.5" with a 15 degree conical coil .25" primary
(probably not important). PS was 15KV/120ma LTR .03. The nozzle was at a 45
degree upward angle into the gap about 3/4-1/2" away. The blast was from a
high power leaf blower connected with 2.5" black PVC and a rubber coupler
from Ace hardware. Top Load 32x8" with an 18x4" attached lower shielding
torus at the top turn. K=~ .13. The gap is loosely modeled from RQ drawings
(I stand corrected).

I'll call it my steam boat gap as the top of the vertical brass dowels have
heat sinks that make the contraption resemble a paddle boat's exhausts ;-)
Simple to make!

Best Regards,
Jim Mora

-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
Of Lau, Gary
Sent: Thursday, March 05, 2009 5:44 AM
To: Tesla Coil Mailing List
Subject: RE: [TCML] Spark gaps (again)

Richard Quick did NOT invent or post anything about hyperbaric gaps.  He did
publish drawings and how-to texts about cylinder (TCBOR) and air-blast gaps.


If getting close to first-notch quenching is the goal, then a multi-segment
cylinder gap is what you want.  If minimizing gap losses is the goal, then a
single-segment gap is what you want.  I believe that achieving first-notch
quench and minimizing gap losses are mutually exclusive goals.

Jim, have you actually seen (i.e. scoped) first notch operation with a
single segment gap?

Regards, Gary Lau
MA, USA

> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> Behalf Of Jim Mora
> Sent: Wednesday, March 04, 2009 9:45 PM
> To: 'Tesla Coil Mailing List'
> Subject: RE: [TCML] Spark gaps (again)
> 
> Hi Dennis,
> 
> Please stand corrected on the Gap construction. The multi-segment called a
> Richard Quick design is a misnomer as it was invented by Richard Hull's
> Group. Richard Quick did invent a single Hyperbaric gap which I have used
> with great success with (2)15/60 neon transformers. Its way down in the
> achieves and has gifs.
> 
> I have never been able to make a decent multi segment copper pipe gap with
> several, sincere attemps. A single hyperbaric gap the air is adjusted to
> quench the gap as near as possible to first transfer of energy into the
> secondary rather than allowing sloshing back and forth which is a big loss
> factor as in a poorly quenched multigap. I just disassembled my multigap
for
> the brass screws and noticed the gross arced out gap surfaces. Heat,
light,
> misalignment all add to energy loss. A single gap is easy to make, to
clean,
> and adjust. Your mileage may vary. It rocked for me!
> 
> Jim Mora
> 
> 
> 
> 
> -----Original Message-----
> From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On
> Behalf
> Of otmaskin5@xxxxxxx
> Sent: Wednesday, March 04, 2009 5:53 PM
> To: tesla@xxxxxxxxxx
> Subject: [TCML] Spark gaps (again)
> 
> I've been following earlier discussions about higher losses associated
with
> multi-segmented?spark gaps (i.e., Richard Quick type) compared to a?single
> gap.? It's clear that the experience of this group has been power losses
are
> significantly less with?a single gap style with adequate airflow.? But I'm
> not sure I caught why that is.? What is the reason that a 0.27" single gap
> loses less power than an 9-gap / 10 pipe RQ gap that has total gap size of
> 0.27"?? If total gap spacing is the same for both, why would one be more
> lossy than the other?
> 
> One other question, has anyone experimented with a RQ style using only 2
> parallel pipes for a single gap???If so, what were the results.? With good
> air flow, it seems this set up?would be good for keeping the gap cool
> considering airflow goes between, around and through the pipes.? And you
> could make the pipes longer, say 4 to 5?inches for better heat sinking
> ability.?
> 
> Sorry to take everyone back to an old topic, but I've been away for a
> while.? Thanks, Dennis Hopkinton MA
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