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 <javascript:>> > 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 <javascript:>. > To post to this group, send an email to neoni...@googlegroups.com > <javascript:>. > To view this discussion on the web, visit > 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. > > -- 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/2714d032-d6ff-4e55-adfb-3008ddcdee8d%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
