Re: First Light, well if you include the SG

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

Original poster: "Terry Fritz" <twftesla-at-uswest-dot-net>

Hi Stan,

I get a secondary frequency of 203.5kHz but a primary frequency of 215kHz.  A
streamer load will reduce that to about 195kHz
 
This suggests that you need like 13.3 primary turns.  Maybe you can tap the MMC
to get a little higher primary capacitance or lower the top terminal a bit. 
You could also just wrap another turn of any old wire around the primary to
test it out.  But I think you secondary frequency may be a bit lower than the
primary frequency.

Cheers,

        Terry

At 08:13 PM 3/9/2001 -0600, you wrote: 
>
> Questions for the group.
>  
> I cranked up the TC for the first time this evening.  The SRSG is firing, but
> nothing else.  As a test, I connected one leg of a small neon bulb to the
> input of the primary from the MMC and get a very weak glow.  I would
> appreciate any directions to take, especially in lieu of any elaborate test
> equipment.  Here are the particulars:
>  
> NST:  15kv/30ma
> Secondary:  28AWG, 1400 turns on a 3.5" OD PVC form, coil length about 21"
> Primary: 1/4" OD tubing, .5" spacing, 12 turns, first diameter is 6"
> First turn of the secondary is about 1/2" above the top of the primary, which
> is flat.
> MMC: 3 strings for a total c of 12nf.  Each cap has a 10megohm drain
> resistor.
> Toriod is 4" OD metal duct work,   The toriod diameter is 17".
> I am using Terry's NST protection circuit with a safety gap in parallel with
> the RSG.
> RSG:  1800 sync, 4 rotating posts for 120 bps.  Spark is firing on the
> leading edge of the brass electrodes.
> RF Ground:  bottom of secondary, center electrode of the safety gap, NST
> protection ground, and primary strike rail all connected together and
> terminate to a dedicated ground rod.
> I am using variacs on the supply to the NST and to the RSG.  I have not yet
> tried any phase adjustment of the SRSG.
> I used the 28AWG from the top of the secondary to attach to the toriod via a
> screw.
> All interconnecting wiring is 12AWG Radio Shack speaker wire.
> I have a DVM and have ohmed out what I know to check and have continuity. 
> Not sure how to check to the viability of the MMC.
>  
> Your inputs will be greatly appreciated.
>  
> Thanks,
> Stan