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1. [Amps] Neon xfmr for HiPot (score: 1): Author: Mike <k4gmh@arrl.net>; Date: Sun, 15 Jul 2012 23:28:49 -0400; Hello, Can a 10 KV, 30 mA., xfmr used for a neon light be used in a hipot tester? Seems like a natural with just a small variac used to vary the primary voltage (120 VAC) for adjusting the output vol; /archives//html/Amps/2012-07/msg00198.html (6,377 bytes)
2. Re: [Amps] Neon xfmr for HiPot (score: 1): Author: Jim Barber <audioguy@q.com>; Date: Sun, 15 Jul 2012 21:20:22 -0700; I don't see why not. I used a 10KV oil furnace ignition transformer and it worked fine. Rectifier block, HV resistors and caps came from fleaBay. Careful - the cases on HV transformers aren't always; /archives//html/Amps/2012-07/msg00199.html (8,322 bytes)
3. Re: [Amps] Neon xfmr for HiPot (score: 1): Author: Ron Youvan <ka4inm@gmail.com>; Date: Mon, 16 Jul 2012 08:24:56 -0400; Yes, and you can have two diodes one in each direction for twice the Voltage for insulation testing. -- Ron - KA4INM _______________________________________________ Amps mailing list Amps@contesting.; /archives//html/Amps/2012-07/msg00202.html (7,726 bytes)
4. Re: [Amps] Neon xfmr for HiPot (score: 1): Author: "Randall, Randy" <Randy.Randall@uchealth.com>; Date: Mon, 16 Jul 2012 09:44:00 -0400; Yes if you rectify it (a use for those old 1B3, 3A3 tubes) and use a very small cap (.001 or mf or less) as a filter sure. Remember to current limit the output so you do not cause damage due to flash; /archives//html/Amps/2012-07/msg00204.html (9,259 bytes)
5. Re: [Amps] Neon xfmr for HiPot (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Mon, 16 Jul 2012 10:31:28 -0400; Neon sign trnsformers are one of the more popular sources. Be sure to current limit the output. Carl KM1H _______________________________________________ Amps mailing list Amps@contesting.com http://; /archives//html/Amps/2012-07/msg00205.html (8,596 bytes)
6. Re: [Amps] Neon xfmr for HiPot (score: 1): Author: Radio WC6W <wc6w_amps@yahoo.com>; Date: Mon, 16 Jul 2012 09:28:17 -0700 (PDT); Hi Mike, Yep. http://qsl.net/wc6w/wc6wtest/index.html?fr50.html 73 & Good morning, Marv WC6W http://qsl.net/wc6w/ _______________________________________________ Amps mailing list Amps@contesting.com; /archives//html/Amps/2012-07/msg00206.html (8,650 bytes)
7. Re: [Amps] Neon xfmr for HiPot (score: 1): Author: k9muf@comcast.net; Date: Mon, 16 Jul 2012 19:44:33 +0000 (UTC); Mike, Yes, a neon transformer can work very well to make a hi-pot tester provided you take a few precautions and I mean besides the safety ones. A neon transformer is designed to be operated with a l; /archives//html/Amps/2012-07/msg00208.html (9,110 bytes)
8. Re: [Amps] Neon xfmr for HiPot (score: 1): Author: Rob Atkinson <ranchorobbo@gmail.com>; Date: Tue, 17 Jul 2012 21:19:31 -0500; Have not done it myself but I have heard of other hams using them for that. you just need enough current to measure a tiny amount near the breakdown potential, at which point you back off on the v. r; /archives//html/Amps/2012-07/msg00213.html (7,988 bytes)
9. Re: [Amps] Neon xfmr for HiPot (score: 1): Author: "Bill, W6WRT" <dezrat1242@yahoo.com>; Date: Wed, 18 Jul 2012 08:20:57 -0700; REPLY: Two diodes alone will not protect the meter. You need a resistor in series with the meter and the 2 diodes back-to-back across both meter and resistor. Here's why: Silicon diodes do not conduc; /archives//html/Amps/2012-07/msg00214.html (8,799 bytes)
10. Re: [Amps] Neon xfmr for HiPot (score: 1): Author: "Bill, W6WRT" <dezrat1242@yahoo.com>; Date: Wed, 18 Jul 2012 08:24:38 -0700; ORIGINAL MESSAGE: REPLY: 30 mA is a lethal amount of current. Be sure to use some form of current limiting so the short circuit current is a fraction of a mA. The test will be just as valid and no ha; /archives//html/Amps/2012-07/msg00215.html (8,413 bytes)
11. Re: [Amps] Neon xfmr for HiPot (score: 1): Author: "Randall, Randy" <Randy.Randall@uchealth.com>; Date: Wed, 18 Jul 2012 11:31:47 -0400; "Careful - the cases on HV transformers aren't always isolated." That is very true esp. for neon transformers. I have seen then rated @ 9000 V center tap grounded. I am very supprised that more peopl; /archives//html/Amps/2012-07/msg00216.html (10,215 bytes)
12. Re: [Amps] Neon xfmr for HiPot (score: 1): Author: Colin Lamb <k7fm@teleport.com>; Date: Wed, 18 Jul 2012 09:04:55 -0700 (GMT-07:00); "and protect your analog meter with 2 diodes across the terminals." While Bill correctly states that the diode will not work across most meters, because the voltage will not be high enough, and does; /archives//html/Amps/2012-07/msg00218.html (9,162 bytes)
13. Re: [Amps] Neon xfmr for HiPot (score: 1): Author: Larry Benko <xxw0qe@comcast.net>; Date: Wed, 18 Jul 2012 10:17:13 -0600; I have a couple of fuel oil ignition transformers I use for this exact purpose. They are rated at 23mA and they actually work very well as current limited sources. They will produce 10kV @ 23mA or 10; /archives//html/Amps/2012-07/msg00219.html (9,853 bytes)
14. Re: [Amps] Neon xfmr for HiPot (score: 1): Author: "Bill, W6WRT" <dezrat1242@yahoo.com>; Date: Wed, 18 Jul 2012 09:25:53 -0700; REPLY: Well, maybe. I don't know which schematic Mike plans to use, but if the meter is in the circuit in such a way that the filter capacitor(s) can discharge through it in case of an arc, the curre; /archives//html/Amps/2012-07/msg00220.html (8,296 bytes)
15. Re: [Amps] Neon xfmr for HiPot (score: 1): Author: k9muf@comcast.net; Date: Wed, 18 Jul 2012 18:38:29 +0000 (UTC); Another possible transformer for a hi-pot tester is the ones in a "bug Zapper". I am referring to the ones that look like an old fashioned coach lamp, not the smaller electronic types. The ones in th; /archives//html/Amps/2012-07/msg00221.html (8,929 bytes)
16. Re: [Amps] Neon xfmr for HiPot (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Wed, 18 Jul 2012 18:14:36 -0400; Excellent point Colin and good HV and high value resistors have been available from Ohmite for several years at low cost and up to 20KV, 2.5W, and in the $5 range at Mouser. Since its not a good idea; /archives//html/Amps/2012-07/msg00222.html (10,124 bytes)
17. Re: [Amps] Neon xfmr for HiPot (score: 1): Author: "Jerry Kaidor" <jerry@tr2.com>; Date: Wed, 18 Jul 2012 21:22:07 -0700 (PDT); ** Could current be limited by a resistor in the primary? I remember thinking - 10kV at 30mA - that's a LOT of juice! I was thinking of trying a transistor oscillator driving an automotive ignition; /archives//html/Amps/2012-07/msg00224.html (8,343 bytes)
18. Re: [Amps] Neon xfmr for HiPot (score: 1): Author: "Aravind Balasubramanian (VU2ABS)" <vu2abs@gmail.com>; Date: Thu, 19 Jul 2012 20:55:50 +0530; I have no local source for either an oilburner xfmr or a Neon xfmr. I do have a couple of 250 - 0 - 250 transforemers salvaged from tube radios. I have earlier used one of them and built a waltson co; /archives//html/Amps/2012-07/msg00225.html (11,040 bytes)

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