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4hv.org :: Forums :: Projects
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Fully Enclosed Jacob's Ladder

 1 2 3 
Move Thread LAN_403
...
Thu Mar 02 2006, 12:30AM
... Registered Member #56 Joined: Thu Feb 09 2006, 05:02AM
Location: Southern Califorina, USA
Posts: 2445
 		the diodes that got hot; are they the feedback ones or the main rectification ones?

If they are the feedback ones (between the fet and the fbt), then they should not get hot at all; even the little 1/4w axial ones do not get warm. I have a feeling they are not fast enough or something if they are getting warm...
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skmetal7
Thu Mar 02 2006, 04:43AM
skmetal7 Registered Member #101 Joined: Thu Feb 09 2006, 08:12PM
Location: Wisconsin
Posts: 41
 		they are the feedback diodes, the type that are mounted on a heatsink in a computer PSU. they are common cathode diodes, i have two mounted on a relatively small heatsink; and i tied the anodes togetheron each diode. maybe i could take out one anode on each diode and see what happens
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...
Thu Mar 02 2006, 04:51AM
... Registered Member #56 Joined: Thu Feb 09 2006, 05:02AM
Location: Southern Califorina, USA
Posts: 2445
 		just get some uf4007's, they will run cold. I am not sure why yours are gotting hot, but I think they are not fast enough or something...
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Tesladownunder
Fri Mar 03 2006, 12:07AM
Tesladownunder Registered Member #10 Joined: Thu Feb 02 2006, 09:45AM
Location: Bunbury, Australia
Posts: 1424
 		I use a similar acrylic tube for a 12kv 20mA NST which has run all day outdoors. There are perforations in the top cap of the tube to allow heat out and the bottom is not sealed so air can convect out. No problems withthe acrylic yet.

Peter
1141344456 10 FT2723 Jacobsladdercovered
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Hazmatt_(The Underdog)
Fri Mar 03 2006, 01:08AM
Hazmatt_(The Underdog) Registered Member #135 Joined: Sat Feb 11 2006, 12:06AM
Location: Anywhere is fine
Posts: 1735
 		woah nice!
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Omicron
Fri Mar 03 2006, 02:31AM
Omicron Registered Member #131 Joined: Fri Feb 10 2006, 09:25PM
Location:
Posts: 185
 		wouldn’t be worried about ozone, the production is very low even in a closed space. Lets see some more pics!
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skmetal7
Fri Mar 03 2006, 05:05AM
skmetal7 Registered Member #101 Joined: Thu Feb 09 2006, 08:12PM
Location: Wisconsin
Posts: 41
 		nice ladder TDU!!!

after a while the ozone irritates my throat, ill have to figure out a way to vent it out the back and let it dissapate. i still need a 30v transformer, right now im running it off 2 24v trans. in parallel


1141360870 101 FT2723 Cool 073


1141361315 101 FT2723 Cool 074

1141361315 101 FT2723 Cool 075

1141361315 101 FT2723 Cool 082

1141361315 101 FT2723 Cool 084

1141361315 101 FT2723 Cool 085

1141361315 101 FT2723 Cool 086

1141361315 101 FT2723 Cool 088

1141361315 101 FT2723 Cool 093

http://media.putfile.com/cool-094

do thoes pots affect the output of the flyback? one's 'focus' and the other is 'screen' i also have to get new diodes, these ones just get too hot, im sure the arcs will be better, even with a new transformer.
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...
Fri Mar 03 2006, 05:59AM
... Registered Member #56 Joined: Thu Feb 09 2006, 05:02AM
Location: Southern Califorina, USA
Posts: 2445
 		no, the knobs don't affect it, just the voltage the comes out on some of the other wires hanging off the flyback.

Looks nice!

btw, if in need of uf4007's I can ship you 4 of them for free, just ask shades
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Omicron
Tue Apr 11 2006, 01:23AM
Omicron Registered Member #131 Joined: Fri Feb 10 2006, 09:25PM
Location:
Posts: 185
 		Very nice! I still want more pics!
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DeathBlade
Thu Apr 20 2006, 05:34PM
DeathBlade Registered Member #300 Joined: Thu Mar 09 2006, 08:21PM
Location: pittsburgh,pa
Posts: 6
 		I have to say it looks great, and were did you get that arm/disarm button?
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