Re: [neonixie-l] Re: 5BP1 CRT

2012-11-30 Thread threeneurons
> Thanks for posting the schematic! Any suggestions on inductors? > > My personal favorite, right now, is the Bourns SDR1806 series. I get 6W out without too much trouble. Its a surface mount part, but its pretty big, so tacking on leads is pretty easy. All Electronics use to have a great li

Re: [neonixie-l] Re: 5BP1 CRT

2012-11-29 Thread John Rehwinkel
> A lot of the old scope circuits used to run the cathode at a negative > voltage. (this required a well insulated filament transformer.) but > meant that the defection plates were almost at ground potential. > > Yes, If I ever made a real circuit, to use them, I would use the negative > ca

Re: [neonixie-l] Re: 5BP1 CRT

2012-11-29 Thread threeneurons
> > > > > > > A lot of the old scope circuits used to run the cathode at a negative > voltage. (this required a well insulated filament transformer.) but > meant that the defection plates were almost at ground potential. > Ye

Re: [neonixie-l] Re: 5BP1 CRT

2012-11-28 Thread Charles MacDonald
On 12-11-28 02:59 PM, threeneurons wrote: Here's the checker schematic. It uses 2 MC34063 chips. One for the HV, and the other for the 6V heater. 10 signals go to the CRT tube. A lot of the old scope circuits used to run the catho

[neonixie-l] Re: 5BP1 CRT

2012-11-28 Thread threeneurons
Here's the checker schematic. It uses 2 MC34063 chips. One for the HV, and the other for the 6V heater. 10 signals go to the CRT tube. -- You received this message because you are subscribed to the Google Groups "neonixie-l"

[neonixie-l] Re: 5BP1 CRT

2012-11-28 Thread Nick
On Wednesday, 28 November 2012 15:39:43 UTC, Oscilloclock wrote: > Not that I'm biased (!), but if you are able to roll your own, you can > see two nice designs employing circle graphics at Grahame's > site and > at Oscilloclock.com . These are based on

[neonixie-l] Re: 5BP1 CRT

2012-11-28 Thread Oscilloclock
Not that I'm biased (!), but if you are able to roll your own, you can see two nice designs employing circle graphics at Grahame's site and at Oscilloclock.com . These are based on David's original design at cathodecorner.com . There are many other ras

[neonixie-l] Re: 5BP1 CRT

2012-11-27 Thread Terry S
Interesting offer -- now the dilemma -- do I open the box and test the tube, or leave it in the box untested, where it is perhaps worth more to a collector? I'm really interested in building a scope clock with the tube. Trying to find a kit I like is the problem. Any recommendations? Terry On N

Re: [neonixie-l] Re: 5BP1 CRT

2012-11-26 Thread John Rehwinkel
> But, I did make a little tube checker, to at least, light them up, and do > rough deflection tests. > > http://threeneurons.files.wordpress.com/2012/09/crt_tst01.jpg That's cute - do you have a schematic for it? I'm guessing it's a variant of your 34063-based nixie supply with a voltage mult

[neonixie-l] Re: 5BP1 CRT

2012-11-25 Thread threeneurons
No, I have 2 5BP4s (white phosphor), and they are rather large animals. I don't know what I'm going to do with mine either. On top of that I also have 2 5UP1s. But, I did make a little tube checker, to at least, light them up, and do rough deflection tests. http://threeneurons.files.wordpress.