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Re: [TCML] Testing a tripler

Thanks for the info. On this page http://en.wikipedia.org/wiki/Voltage_tripler there's a picture that shows what looks like exactly the same device I have (the picture is opposite the entry "Applications." The green rectangular object is the tripler.
Based on what I see in the photo, U~ is the conection to the flyback, while A and D (the blue and white wires, respectively) disappear into connections on the circuit board. UF is the thick white wire in the center of the tripler, reputedly part of the set's focus control. 

I'll try the diode tests suggested.

Paul
----- Original Message ----- From: "Carl Noggle" <cn@xxxxx> 
To: "Tesla Coil Mailing List" <tesla@xxxxxxxxxx>
Sent: Friday, February 17, 2012 12:59 PM
Subject: Re: [TCML] Testing a tripler



There's a schematic at this URL--


http://www.google.com/imgres?q=voltage+tripler&num=10&um=1&hl=en&safe=off&client=firefox-a&rls=org.mozilla:en-US:official&biw=1680&bih=909&tbm=isch&tbnid=50PB-rvzowc_TM:&imgrefurl=http://www.play-hookey.com/ac_theory/ps_v_multipliers.html&docid=QyQbSsppcH_jeM&imgurl=http://www.play-hookey.com/ac_theory/images/rectifier_tripler.gif&w=250&h=125&ei=-ZI-T4qEAYqyiQLasLmIAQ&zoom=1&iact=hc&vpx=394&vpy=346&dur=608&hovh=98&hovw=197&tx=95&ty=44&sig=113737727595651070905&sqi=2&page=1&tbnh=81&tbnw=162&start=0&ndsp=40&ved=0CGgQrQMwCQ

( I think that's the longest one I've ever seen.)
Each of the diodes has about 20 junctions or so in series, so the forward voltage drop is of the order of 13 volts. The drop from U to A will be about 40 volts. If you have a power supply at voltages like this and can limit the current to about one mA or less, you can test it like a diode--should be a drop of tens of volts one way and open the other way. If the drop is the same in both directions the tripler is hosed.
The D must be where the flyback xfmr feeds in. The diodes in these units can only handle about 3mA or so average current. To get good operation, the input will have to be about 5kHz or more. 

---Carl
I was hoping for a little advice. I obtained a couple of TV voltage triplers (part number 1895-641-095). These are voltage multipliers used mainly in older TVs to boost and rectify voltage to the picture tube.
They seem OK, but I'd like to test them before going to all the trouble of assembling components around them to produce HV DC. I can't seem to find specs or meter readings for them. Anyone know what values I should get testing them with a multimeter?
There are four inputs: D, A, U~ and UF. UF is for focus control. U~ is the hot lead, A is neutral or ground. I'm not sure what D is for.
There's one HV output. It has a suction cup connector on it, like you see on flybacks. 

Any tips?

PBT
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