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?
On Thu, Apr 19, 2018 at 10:42 AM, Tomasz Kowalczyk <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/ms >> gid/neonixie-l/8C475F01-4A6C-49D5-8DE3-7C56D15E8184%40mac.com. >> For more options, visit 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. > To post to this group, send email to neonixie-l@googlegroups.com. > To view this discussion on the web, visit https://groups.google.com/d/ms > gid/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. > -- 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. To post to this group, send an email to 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. For more options, visit https://groups.google.com/d/optout.
