[neonixie-l] Re: IN-28's in real life...
Adventures with IN-28s. I have determined that in this clock the IN-28s are operated in the following way: The anode is connected to half wave rectified 240V AC, the cathode is grounded through a 4.7K resistor. The grid is connected to the control board through a 1M resistor with a 3.9M pulldown. I assume the grid voltage is around 160-170V The original transformer is gone so I will have to make a new one. This isn't too bad since I can make it with a 120V primary. -- 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 view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/56332dda-683a-4137-bbc1-591fe5e744dc%40googlegroups.com.
Re: [neonixie-l] Re: What does your shop look like?
Don't forget to ask the manufacturer if it can measure high capacitance MLCC capacitors if you are going to use that type of capacitor as they are a bit tricky to test. There are some explanations for this from the manufacturers, and this from Digikey: https://forum.digikey.com/t/testing-high-capacitance-mlcc-s/34. I once got an earlier model (some 3 years ago I think it was) of the DE-5000 and then it didn't measure MLCC capacitors correctly. /Martin On Wednesday, 7 August 2019 21:09:34 UTC+2, Bill Notfaded wrote: > > For many things that's alright but most meters like that only test at one > set lower frequency... often 100Hz or less. The meter I posted is unique > for the money because it can test in the high frequencies previously only > expensive test gear would. For the reason why this and also frequencies > like specifically 120Hz are important TRX Bench can explain much better > than I ever could: > > https://www.youtube.com/watch?v=ivVSq0IiZGo=24s > > I'm not an EE but a CIS major so I can really appreciate this explanation. > > Best Regards, > > Bill > -- 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 view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/08d25e61-dfa6-4eb1-8e93-68bf879eb1cc%40googlegroups.com.
Re: [neonixie-l] Re: What does your shop look like?
For many things that's alright but most meters like that only test at one set lower frequency... often 100Hz or less. The meter I posted is unique for the money because it can test in the high frequencies previously only expensive test gear would. For the reason why this and also frequencies like specifically 120Hz are important TRX Bench can explain much better than I ever could: https://www.youtube.com/watch?v=ivVSq0IiZGo=24s I'm not an EE but a CIS major so I can really appreciate this explanation. Best Regards, Bill -- 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 view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/25d288a8-19c8-41fd-beed-5ff70bf49e0c%40googlegroups.com.
Re: [neonixie-l] Re: What does your shop look like?
I bought the meter he linked to. It is really quite amazing. You can connect the component being tested, to any of the leads in any orientation. It figures out what it is and which way round it is, then measures it. > On Aug 7, 2019, at 12:16 PM, Bill Notfaded wrote: > > Not as cheap but this is the LCR meter I use and it's highly respected on the > EEVBlog (one of my fav EE sites): > https://www.deree.com.tw/de-5000-lcr-meter.html > > You can buy the bundle on ebay and amazon for around a C note. I picked a > spare TL-21 and then hacked it to add longer kevin clip cables... there are > many videos on the internet showing it: > https://www.eevblog.com/forum/testgear/de-5000-lcr-tl-21-mod/ > > These larger, longer kelvin clips have made testing things like these... I've > upgraded some Hafler DH-500 amps recently with new filter caps: > 24000UF 100V > > > > Until recently I had always thought a really good LCR meter was kinda too > pricey and out of reach for me. Well like many other things technology has > improved and reduced the price for very accurate testing gear. One thing > really nice is it's auto mode. When testing surface mount components > sometimes I've found it's hard to tell what's what. Is that a resistor or an > inductor? It's not perfect but most of the time it's spot on. The ability > to change the test frequency up to 100kHz is really nice. Most spec sheets > for parts in the US use 120 Hz and it's got that too. > > Bill > -- > You received this message because you are subscribed to a topic in the Google > Groups "neonixie-l" group. > To unsubscribe from this topic, visit > https://groups.google.com/d/topic/neonixie-l/6jWXTmPhywM/unsubscribe. > To unsubscribe from this group and all its topics, send an email to > neonixie-l+unsubscr...@googlegroups.com. > To view this discussion on the web, visit > https://groups.google.com/d/msgid/neonixie-l/1342ee5b-685a-4650-afee-8a220dae8ff3%40googlegroups.com. > -- 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 view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/37316858-4059-4164-89A0-8B22473955F8%40gmail.com.
[neonixie-l] Re: What does your shop look like?
Not as cheap but this is the LCR meter I use and it's highly respected on the EEVBlog (one of my fav EE sites): https://www.deree.com.tw/de-5000-lcr-meter.html You can buy the bundle on ebay and amazon for around a C note. I picked a spare TL-21 and then hacked it to add longer kevin clip cables... there are many videos on the internet showing it: https://www.eevblog.com/forum/testgear/de-5000-lcr-tl-21-mod/ These larger, longer kelvin clips have made testing things like these... I've upgraded some Hafler DH-500 amps recently with new filter caps: [image: E36D101LPC243UDA5M.jpg]24000UF 100V Until recently I had always thought a really good LCR meter was kinda too pricey and out of reach for me. Well like many other things technology has improved and reduced the price for very accurate testing gear. One thing really nice is it's auto mode. When testing surface mount components sometimes I've found it's hard to tell what's what. Is that a resistor or an inductor? It's not perfect but most of the time it's spot on. The ability to change the test frequency up to 100kHz is really nice. Most spec sheets for parts in the US use 120 Hz and it's got that too. Bill -- 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 view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/1342ee5b-685a-4650-afee-8a220dae8ff3%40googlegroups.com.
