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43262

Re: High voltage testing

That combination of Zenners is exactly what I am using in my two Victoreen 6As. For anyone wondering how well this home brew voltage regulation works compared
m1i8k3e6
7:38 AM
#43262
 
43261

Re: High voltage testing

Oh yeah, forgot about the seleniums. I recall from a while back that this 6000v rectifier will work to replace the Seleniums. "r6000" search on
C. R.
Aug 1
#43261
 
43260

Re: High voltage testing

All of the CDV-700's can get weird problems, but probably the worst to get working are the ENI units.....they were designed poorly, and they age poorly. They
M K
Aug 1
#43260
 
43259

Re: High voltage testing

Generally, when a Corotron fails, it goes high...but NOT always! The replacement zener diode board works fine, as do home-made equivalents-3 300 volt zeners,
M K
Aug 1
#43259
 
43258

Re: High voltage testing

Change the selenium rectifier diode and the corotron tube should take care of the HV problem. If not then the transistor in the oscillator circuit. I have a
yp_donald_ozone_park
Aug 1
#43258
 
43257

Re: High voltage testing

Ahh k. Was wondering about that, but I thought maybe rather than going high, it might over-regulate as a safety measure. So, if both him and I have Antons
C. R.
Aug 1
#43257
 
43256

Re: High voltage testing

Actually, if the HV is too LOW, then parallelling that Corotron replacement may not work correctly-if the HV is too HIGH, then it will. On Sat, Aug 1, 2015 at
M K
Aug 1
#43256
 
43255

Re: High voltage testing [2 Attachments]

Looks good. I've seen Lionel work down to 820 volts, but 850 or 860 v would suggest bad HV, maybe a leak somewhere.
David Nix
Aug 1
#43255
 
43254

Re: High voltage testing [2 Attachments]

Oops (duh) nevermind now I understand. I overlooked the brands you already stated. I also have an Anton which puts out low voltage around that same range
C. R.
Aug 1
#43254
 
43253

Re: High voltage testing [2 Attachments]

Yeah the 9.20 = 920v multiplied out, so the HV is good. My eberline reads 915v using the same resistor and it works fine, so 5v difference - no big deal. A
C. R.
Aug 1
#43253
 
43252

Re: High voltage testing

Got the 1G OHM resister from Digi-Key today. Fast shipping and packed so well a truck could have run over it and it would have been ok. First I hooked it up to
gurn1701
Aug 1
#43252
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43251

Re: High voltage testing

Yep, It confused me enough. Oh well, lesson learned. Ordered the one from Digi-Key, thanks for the link!
gurn1701
Jul 30
#43251
 
43250

Re: High voltage testing

Yup, nailed it - if you look down in the body of that auction text - the seller says: "Carbon Film 0.1Ù resistor, tolerance ±5%, power rating 0.5W T.C." So,
C. R.
Jul 30
#43250
 
43249

Re: High voltage testing

Those look like 100milliOhm resistors, not 100MegOhm. Kevin.
kwcclark
Jul 30
#43249
 
43248

Re: High voltage testing

OK. It looks to me that your ammeter is reading .087 milliamps, or 8.7 *10^-5 amps. A g-ohm is 10^9 ohms. V=RI=8.7*10^4=87000V Wow! Pretty good CDV-700. Are
m1i8k3e6
Jul 30
#43248
 
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