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Big Red. The Coil (now with 1st light pics)

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Firefox
Sat Jun 28 2008, 04:55AM
Firefox Registered Member #1389 Joined: Thu Mar 13 2008, 12:50AM
Location: Pittsburgh, PA
Posts: 346
 		B-E-A-utiful. Your construction technique is excellent, and the coil is coming together well. Keep up the good work!
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Andyman
Sat Jun 28 2008, 05:27AM
Andyman Registered Member #1083 Joined: Mon Oct 29 2007, 06:16PM
Location: Upland, California
Posts: 256
 		WOW!! Where did you get those nice end caps and the standoff???
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teslacoolguy
Sat Jun 28 2008, 01:47PM
teslacoolguy Registered Member #1107 Joined: Thu Nov 08 2007, 10:09PM
Location:
Posts: 792
 		Well.... add up a nice lathe and 4 years of experence with it and that is the result. The end caps are made from pvc material so i can just glue them to the pvc pipe with standard pvc glue and i made the standoff from plastic and i cut grooves into it on the lathe.
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teslacoolguy
Mon Jun 30 2008, 12:16AM
teslacoolguy Registered Member #1107 Joined: Thu Nov 08 2007, 10:09PM
Location:
Posts: 792
 		Today i made lots of progress on the coil. I mounted the mmc, made the safety gap and wound the rf chokes.
1214784925 1107 FT47960 Choke Varnishing

1214784925 1107 FT47960 Mmc Drilling

1214784925 1107 FT47960 Safety Gap

1214784925 1107 FT47960 Coil So Far 1
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Shaun
Mon Jun 30 2008, 04:38AM
Shaun Registered Member #690 Joined: Tue May 08 2007, 03:47AM
Location: New Jersey, USA
Posts: 616
 		Wasn't it said before that using a series inductor as an RF choke is bad? I might be wrong, because I know I've used them myself, but I just think I remember reading that.
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J. Aaron Holmes
Mon Jun 30 2008, 05:03AM
J. Aaron Holmes Registered Member #477 Joined: Tue Jun 20 2006, 11:51PM
Location: Seattle, WA
Posts: 546
Shaun wrote ...

Wasn't it said before that using a series inductor as an RF choke is bad? I might be wrong, because I know I've used them myself, but I just think I remember reading that.
Not necessarily bad, but at most pointless. RC filters are the thing these days. There are numerous great threads on this topic on the TCML, one from just last week. And also on 4hv a couple of weeks ago: Link2

EDIT: So that this post doesn't come of as all negative, however: The coil's looking great! Can't wait to see some sparkiness!!

Cheers,
Aaron, N7OE
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flannelhead
Mon Jun 30 2008, 11:31AM
flannelhead Registered Member #952 Joined: Mon Aug 13 2007, 11:07AM
Location: Finland
Posts: 388
 		Hey man, very nice work! It's great to see you have enough patience to do the work so nicely! You are one of the few people who are patient enough to do the finishing nicely as well. Great coil! smile
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vasil
Mon Jun 30 2008, 01:50PM
vasil Registered Member #229 Joined: Tue Feb 21 2006, 07:33PM
Location: Romania
Posts: 506
 		Nice coil! Do not forget the strikerail. Any strike to the primary turns can produce breakdown of the MOTs (low insulation there).
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teslacoolguy
Mon Jun 30 2008, 09:34PM
teslacoolguy Registered Member #1107 Joined: Thu Nov 08 2007, 10:09PM
Location:
Posts: 792
 		Yea i will not for get to add the strike rail but i have to wait until i go to the hardware store to get some pipe fittings before i can make it.
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Dr. SSTC
Fri Jul 04 2008, 07:33AM
Dr. SSTC Registered Member #1407 Joined: Fri Mar 21 2008, 07:09AM
Location:
Posts: 222
Firefox wrote ...

My mom had a heart attack from freaking MOT arcs from a 3' PVC chicken stick.

As for the coil, she's beautiful. I love the variac too, where the heck did you get that thing?

haha same here
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