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Registered Member #1803
Joined: Fri Nov 07 2008, 07:01PM
Location:
Posts: 3
Hi all, in some challenge I achieved 400,-Sk for buying price of my chose, but I have to buy it till 10.11.2008 07:30 so I have perhaps only one shop (I am able to use some additional money of my own if needed, but not too much, adequate ammount to what I acheved)
I decided to look for some capacitors to make MMC for my SGTC
Parameters
Secondary (no topload yet, planning obtaining some sphere or toroid) diameter 112 mm height 717 mm rounds 2000
from this computed (I hope that corectly) L = 62,723 mH C = 10,163 pF F0 = 199 339 Hz
Primary - solenoid (inner part down, outer part up) rounds 9 diameter inner 170 mm diameter outer 480 mm height 50mm
from this computed L = 29.647 uH needed C = 21,982 nF (currently made from cooking aluminium foil and gramophone discs)
knowledge of slovak language is advantage during reading this page but for others, this link is currently on capacitors (kondenzator) page Stránka 1/40 = page 1 of 40 (hope it will be easy to navigate for non slovak speaker)
btw: Ceramic 3kV looks interesting for me but I don't know if ceramic is good capacitor
Registered Member #1803
Joined: Fri Nov 07 2008, 07:01PM
Location:
Posts: 3
I forgot my transformer is some in trash found it gives 14 042 V/50Hz from input 237V/50Hz (ratio about 1:60) but I don't know current, but readable part of its label says it is dispersive transformer so it could withstand short circuit
Registered Member #1225
Joined: Sat Jan 12 2008, 01:24AM
Location: Beaumont, Texas, USA
Posts: 2253
Perhaps the 100nf 200volt WIMA capacitors on the top of this page would be good. Just put as many in series as you need to get the right voltage (which would be called a 'string' of capacitors) and then put as many 'strings' as you need in parallel to get needed capacitance and voltage at the same time.
Registered Member #1803
Joined: Fri Nov 07 2008, 07:01PM
Location:
Posts: 3
Thanks, looks little more expensive for my 400,-Sk budget, but if it is only suitable from this shop I'll buy few and store them for time with bigger budget
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Help with chosing capacitor for MMC
