Re: A tall thin piggy, or a short squat piggy?
actually the cost for the same break energy will be the same at
either voltage - i'd just worry about corona more at 19.9kV.
Theoretically a 19.9kV system is better - it will have a higher Xp - see the
R. M. Craven paper listed on the Tesla Webring.
I'd go for the largest 19.9kV unit I had space for, as you can always use
the variac to cut down the voltage and more voltage is useful for any maggi
work you may want to do.
> Original Poster: "Paul Eugene Kidwell" <tmb-at-ieee-dot-org>
> I've been thinking of building my first piggy powered TC. I've found
> what appears to be a good source that offers a wide varity of pigs.
> My question is, which one to choose?
> They have 7.2 KV and 19.9 KV?
> I know that it would be alot more difficult (i.e. costly) to make a 19.9
> KV MMC than it would to make a 7.2 KV one. (I'm planning on going with
> an MMC) But is 7.2 KV addiquite? With equal KVA ratings, would 19.9 KV
> output out perform 7.2 KV? Would the difference in performance be enough
> to justify the difficulties involved with the higher voltage?
> They have 10KVA($95), 15KVA($135), & 25KVA($208)?
> Would I be better off buying a smaller one, and working with that until
> I wanted to go bigger, or buy a large one now and ballast the h*** out
> of it till I build a *really* large TC?
> I'm having trouble seeing the forest for the trees here :)
> BTW, the source is Austin International