Hello
I cannot afford the big iron. Well, I can, but then I would end up limited to one project ever and have nothing to hobby with again

but doublers I can afford and they do well enough in small projects for both radio and oscilloscope. However, before I post a WTB I thought I should run this by you folk first. I saw this item on eBay
Attachment:
RussianDoubler.txt.jpg [ 50.46 KiB | Viewed 9471 times ]
not long ago and thought "I could do with that" but not for the 20 some dollars it would cost to buy from eBay. I set up a simulation of it and worked some values (as nothing was on the original) that are values I have typically seen in doublers (and this one being made for a crt I went with that for load, the 1nF for the crt capacitance I chose was nominal in a dozen spec sheets I looked at), and have decided on a parts list IF they are right. But, posting here first to see if anyone who's had hands on experience with doublers can give any suggestions on this before I commit to purchasing the parts and trying.
Specifically of interest to me is the veracity of the 68nF cap at over 800v which is the only 'hard part' to find that I have discovered so far (well, easy if I want to spend 20 dollars or more on one capacitor but then if I wanted to spend 20 dollars in one go I would have just bought this from the seller in the first place ...) (I am planning on asking for a non-ceramic 68nF@2500v or better actually as I need about 1000v out from this for one project and about something else I just realized I didn't make note of that and oh I go digressing again >.<).
Attachment:
RussianDoubler.jpg [ 43 KiB | Viewed 9471 times ]
(PLEASE don't shoot me
I know there are pencil and paper maths ways of doing this, and I have done them and found the sim to give nearly the same results in general) This is the sim of it (save as a txt file and save, open the txt file in the stand alone of this program as so many browsers have such a cow over java)
http://www.falstad.com/circuit/$ 1 5.0E-6 382.76258214399064 50 5.0 50
c 128 48 192 48 0 4.7000000000000005E-7 -76.55974658681487
c 192 48 256 48 0 4.7000000000000005E-7 -41.56974594232236
c 256 48 320 48 0 4.7000000000000005E-7 -23.442871740806922
c 160 96 224 96 0 4.7000000000000005E-7 -41.44704255752039
c 160 96 160 160 0 6.8E-8 22.205035247359152
c 224 96 288 96 0 4.7000000000000005E-7 -23.534035529677837
c 384 208 448 208 0 6.8E-8 -130.93742096185858
c 384 240 384 304 0 4.7000000000000005E-7 197.80227183481105
c 224 304 288 304 0 4.7000000000000005E-7 197.85092821780663
c 288 96 352 96 0 4.7000000000000005E-7 -26.37390996894706
d 128 48 160 96 1 0.805904783
d 256 48 288 96 1 0.805904783
d 192 48 224 96 1 0.805904783
d 320 48 352 96 1 0.805904783
d 160 96 192 48 1 0.805904783
d 224 96 256 48 1 0.805904783
d 288 96 320 48 1 0.805904783
r 352 96 448 96 0 10000.0
w 160 208 384 208 0
w 448 96 448 160 0
r 288 304 384 304 0 10000.0
d 288 304 256 256 1 0.805904783
d 256 256 224 304 1 0.805904783
w 448 240 448 336 0
w 448 336 352 336 0
w 352 336 352 384 0
w 384 304 416 304 0
w 416 304 416 384 0
d 160 336 224 336 1 0.805904783
w 224 336 224 384 0
w 160 336 160 384 0
w 160 240 160 304 0
w 160 304 224 304 0
w 80 256 80 336 0
c 80 256 144 256 0 4.7000000000000005E-7 119.41909421726496
w 80 48 128 48 0
w 144 256 256 256 0
w 80 336 160 336 0
R 160 384 160 416 0 1 60.0 120.0 0.0 0.0 0.5
g 48 384 48 416 0
O 224 384 224 416 0
O 352 384 352 416 0
O 416 384 416 416 0
c 448 336 448 384 0 1.0E-9 130.93742096185858
g 448 384 448 400 0
g 496 352 496 368 0
c 496 304 496 352 0 1.0E-9 -197.80227183481105
w 416 304 496 304 0
w 160 208 48 208 0
r 224 384 304 384 0 500000.0
g 304 384 304 416 0
w 48 208 48 384 0
w 160 160 160 208 0
w 160 208 160 240 0
w 448 160 448 208 0
w 448 208 448 240 0
w 80 256 80 48 0
w 384 208 384 240 0
x 398 251 431 255 0 14 250V
x 118 228 151 232 0 14 120V
x 273 254 306 258 0 14 250V
x 313 33 346 37 0 14 250V
x 398 173 431 177 0 14 830V
x 244 408 292 412 0 14 No Idea
x 87 383 135 387 0 14 120V in
x 506 346 615 350 0 14 CRT capacitance
x 337 446 375 450 0 14 -230V
x 406 446 439 450 0 14 830V
x 136 489 666 495 0 24 All the cap voltages have to be doubled for safety
x 170 154 203 158 0 14 120V
o 40 64 0 34 160.0 9.765625E-5 0 -1
o 41 64 0 34 1197.2621413014756 9.765625E-55 1 -1
o 42 64 0 34 320.0 9.765625E-5 2 -1