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Registered Member #2553
Joined: Fri Dec 18 2009, 01:36PM
Location: St Cloud Minnesota
Posts: 97
im in central MN united states. im looking for someone that has HV pulse rated caps(preferebly polyester or polypropyline) for sale for cheap. i could use a ~8.6nf with minimum 22kv. if you have several, i can make a MMC. please contact me if you have an offer! thank you very much!
Registered Member #2099
Joined: Wed Apr 29 2009, 12:22AM
Location: Los Altos, California
Posts: 1716
those are pretty expensive for just 4. here's the same for 10usd and free shipping
Huh? Does 4pcs 2200 pF 20 kV, $ 9.99, free shipping from mainland China plainly beat 4pcs 2200 pF 25 kV, $12.99, free shipping from Hong Kong? How about in applications requiring a minimum of 22 kV, as in the OP?
Although hv disk ceramics work in a sgtc they aren't as food as polypropylene.. not such a 'snappy' discharge.
Your practical advice about SGTC's is respected and appreciated. But personally, I prefer the crunchier capacitors for dessert.
Registered Member #2553
Joined: Fri Dec 18 2009, 01:36PM
Location: St Cloud Minnesota
Posts: 97
Sulaiman wrote ...
Although hv disk ceramics work in a sgtc they aren't as food as polypropylene.. not such a 'snappy' discharge.
im getting a lot of conflicting information regarding ceramic vs polypropylene caps for a SGTC. could you please elaborate a little more? this is my 1st TC and trying to get everything right as much as i can. im looking for reliability. i also heard ceramic heats up to fast. please shed some light on this for me. also, peak voltage is 21.210kv how much tolerance should i give for safe operation? TY!
Registered Member #2919
Joined: Fri Jun 11 2010, 06:30PM
Location: Cambridge, MA
Posts: 652
Please for the love of your favorite deity DO NOT waste money on crappy Chinese capacitors for your tank cap. They aren't even always good for their rated voltages in air, let alone for reactive power handling. In particular, the endless "High Voltage Tesla Capacitors" you find on Ebay aren't worth squat. Invest in a few nice CDE942's from EVR's site (or Rell if you are buying in bulk). They'll last you forever.
Registered Member #2553
Joined: Fri Dec 18 2009, 01:36PM
Location: St Cloud Minnesota
Posts: 97
bwang wrote ...
Please for the love of your favorite deity DO NOT waste money on crappy Chinese capacitors for your tank cap. They aren't even always good for their rated voltages in air, let alone for reactive power handling. In particular, the endless "High Voltage Tesla Capacitors" you find on Ebay aren't worth squat. Invest in a few nice CDE942's from EVR's site (or Rell if you are buying in bulk). They'll last you forever.
i googled evr but couldnt find site. rell.com doesnt have any results for CDE942
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looking for HV caps
