> Thanks to all for the answers including the clarification on turns ratio. > One question though, this reads as an inverter in the listing, so I was under > the impression I could feed it DC in and get AC out. They reference using a > 9V battery as input in the description. Is my impression correct?
It's not a complete inverter, it's just a transformer for an inverter. Transformers only work on AC signals. I'm guessing they used a small transistor oscillator powered by a 9V battery to drive the primary to test it. You would need to do essentially the same thing to use it. - John > > On Thu, Apr 19, 2018 at 10:42 AM, Tomasz Kowalczyk <ten.ko...@gmail.com > <mailto:ten.ko...@gmail.com>> wrote: > This is not the turn ratio. The person who wrote that text measured DC > resistance... so 260 is resistance ratio, which is a pretty useless > parameter. Both windings are most likely wound with different wires (thicker > for low voltage side, the thinnest possible on secondary). > What you need to do to determine turns ratio is to plug one side of the > transformer to a known AC source and measure secondary. > Due to unknown inductance I would not recommend using mains voltage, as > people can do when identifying turns ratio of an output transformer for valve > amplifiers. > > However, you might not need to know the turns ratio at all. I would use some > low voltage, low duty cycle PWM at about 50-100kHz (practically any > microcontroller is capable of delivering that) and just look how much voltage > there is on the output, which would give a starting point in designing the > supply. > > W dniu czwartek, 19 kwietnia 2018 16:25:51 UTC+2 użytkownik philthepill > napisał: > Turns ratio 260... 1 Volt AC in gives about 260 Volts AC out - without > rectifyers etc. Need to be very low on the AC in or you will get excessive > HV out states it is for devices using much higher voltage. > >> ---------- Original Message ---------- >> From: John Rehwinkel <jre...@mac.com <>> >> Date: April 19, 2018 at 9:50 AM >> >> >> > Can on of my betters on the list advise on whether they see any issues >> > with using this to test a NIMO tube using a low voltage DC input? >> >> It seems to me it should work. The main problems I'd watch out for are >> overdriving it (an arc in a winding will ruin it), and regulating the >> voltage. You may or may not want a doubler on the output. >> >> > Also, it doesn't come with a pinout, and I had heard that inverter >> > transformer inputs are typically on a diagonal instead of one side. Can >> > anyone confirm that this is standard, and suggest a way to figure out the >> > pinout using a multimeter only (not sure if that is possible but I figured >> > I'd ask). >> >> It's easy with a multimeter, just check for resistance. You should get low >> resistance on the primary (watch out for getting zapped on the secondary >> while doing this), and moderate resistance on the secondary. >> >> Regards, >> John >> >> -- >> You received this message because you are subscribed to the Google Groups >> "neonixie-l" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to neonixie-l+...@googlegroups.com <>. >> To post to this group, send an email to neoni...@googlegroups.com <>. >> To view this discussion on the web, visit >> https://groups.google.com/d/msgid/neonixie-l/8C475F01-4A6C-49D5-8DE3-7C56D15E8184%40mac.com >> >> <https://groups.google.com/d/msgid/neonixie-l/8C475F01-4A6C-49D5-8DE3-7C56D15E8184%40mac.com>. >> For more options, visit https://groups.google.com/d/optout >> <https://groups.google.com/d/optout>. >> > > > -- > You received this message because you are subscribed to the Google Groups > "neonixie-l" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to neonixie-l+unsubscr...@googlegroups.com > <mailto:neonixie-l+unsubscr...@googlegroups.com>. > To post to this group, send email to neonixie-l@googlegroups.com > <mailto:neonixie-l@googlegroups.com>. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/2714d032-d6ff-4e55-adfb-3008ddcdee8d%40googlegroups.com > > <https://groups.google.com/d/msgid/neonixie-l/2714d032-d6ff-4e55-adfb-3008ddcdee8d%40googlegroups.com?utm_medium=email&utm_source=footer>. > > For more options, visit https://groups.google.com/d/optout > <https://groups.google.com/d/optout>. > > > -- > You received this message because you are subscribed to the Google Groups > "neonixie-l" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to neonixie-l+unsubscr...@googlegroups.com > <mailto:neonixie-l+unsubscr...@googlegroups.com>. > To post to this group, send email to neonixie-l@googlegroups.com > <mailto:neonixie-l@googlegroups.com>. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/CAJrqPH-8a7t%3DmM%3DYNmLxbvft4tXiQ3nLpC8U626YEOtD9WSCsw%40mail.gmail.com > > <https://groups.google.com/d/msgid/neonixie-l/CAJrqPH-8a7t%3DmM%3DYNmLxbvft4tXiQ3nLpC8U626YEOtD9WSCsw%40mail.gmail.com?utm_medium=email&utm_source=footer>. > For more options, visit https://groups.google.com/d/optout > <https://groups.google.com/d/optout>. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. 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