[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [PHISH] Re: 4 stage SISG
Original poster: "resonance" <resonance@xxxxxxxxxxxx>
The small tungstens will work but you probably will not hit optimum
The parallel copper tube gap works better because it offers faster
quenching (pri shutoff) and allows the sec coil to ring free without
trying to transfer energy back into the pri. Most nst systems
actually ring out perhaps 3-5 envelopes and reducing this helps performance.
I use 7 total gaps for a 12/60 nst system and 4 total gaps for a
12/30 system. Use a 100 cfm blower fan on a 6 inch ID PVC tube with
the copper pipe sections, 3 inches long x 3/4 inch, mounted
inside. I will send you some photos off-list as a guide.
The small tungsten gap will work but overheating on runs over 10-15
seconds could cause a quenching (unable to properly disconnect the
pri to allow ringing in the sec coil) problem.
Speaking of which, I'm making a static gap for my small scale TC now. It's a
little 4" secondary with 1700 turns. I was planning on a two gap spark gap
using the those evil thoriated tungsten rods. Any thoughts on the number of
gaps that should be used for best quenching in a little 15/30 TC? For that
matter, is a fan really necessary at this low level?