Re: [volt-nuts] Neon bulbs for HP 3420B or 419A chopper

n Behalf Of David > C. > > Partridge > > Sent: 18 November 2017 14:08 > > To: 'Discussion of precise voltage measurement' > > Subject: Re: [volt-nuts] Neon bulbs for HP 3420B or 419A chopper > > > > I'm in the process of getting some A2B neons from Mouser. > > >

Re: [volt-nuts] Neon bulbs for HP 3420B or 419A chopper

id C. > Partridge > Sent: 18 November 2017 14:08 > To: 'Discussion of precise voltage measurement' > Subject: Re: [volt-nuts] Neon bulbs for HP 3420B or 419A chopper > > I'm in the process of getting some A2B neons from Mouser. > > Dave > > _

Re: [volt-nuts] Neon bulbs for HP 3420B or 419A chopper

measurement' Subject: Re: [volt-nuts] Neon bulbs for HP 3420B or 419A chopper I'm in the process of getting some A2B neons from Mouser. Dave ___ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman

Re: [volt-nuts] Neon bulbs for HP 3420B or 419A chopper

I'm in the process of getting some A2B neons from Mouser. Dave -Original Message- From: volt-nuts [mailto:volt-nuts-boun...@febo.com] On Behalf Of Charles Steinmetz Sent: 18 November 2017 13:11 To: volt-nuts@febo.com Subject: Re: [volt-nuts] Neon bulbs for HP 3420B or 419A chopper

Re: [volt-nuts] Neon bulbs for HP 3420B or 419A chopper

David wrote: Then an A3C (NE-2U) shouldn't work. The drive voltage is 125V. Correct. The operating current is 1.5mA (.15V/102R) in the 3420B, so I would expect this to be the A2B (NE-2V) part. The NE-2V is another 700uA design current lamp, just like the CML A2B and A2B-T. Indeed, if

Re: [volt-nuts] Neon bulbs for HP 3420B or 419A chopper

), but the drive voltage isn't high enough! Dave -Original Message- From: volt-nuts [mailto:volt-nuts-boun...@febo.com] On Behalf Of Charles Steinmetz Sent: 17 November 2017 20:53 To: volt-nuts@febo.com Subject: Re: [volt-nuts] Neon bulbs for HP 3420B or 419A chopper george wrote: > Farnell

Re: [volt-nuts] Neon bulbs for HP 3420B or 419A chopper

bulbs for HP 3420B or 419A chopper Hi Dave Farnell (UK) list NE-2U neon lamps. 73 George G6HIG ___ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions

Re: [volt-nuts] Neon bulbs for HP 3420B or 419A chopper

george wrote: Farnell (UK) list NE-2U neon lamps. Note that the NE-2U is a "high brightness" lamp with a 135vDC (max) strike voltage. Standard brightness lamps strike at 90vDC (max). The Farnell site available to me here in the US lists the CML (Chicago Miniature Lamp) A3C, which CML

Re: [volt-nuts] Neon bulbs for HP 3420B or 419A chopper

Hi Dave Farnell (UK) list NE-2U neon lamps. 73 George G6HIG ___ volt-nuts mailing list -- volt-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts and follow the instructions there.

Re: [volt-nuts] Neon bulbs for HP 3420B or 419A chopper circuit

Thank you, Charles, for the excellent summary and references. Jeremy N6WFO On Fri, Nov 17, 2017 at 6:23 AM Charles Steinmetz wrote: > David wrote: > > >> to buy NEW bulbs from a reputable manufacturer who provides specs > > > > Any recommendations - I can't find a

Re: [volt-nuts] Neon bulbs for HP 3420B or 419A chopper circuit

David wrote: to buy NEW bulbs from a reputable manufacturer who provides specs Any recommendations - I can't find a source in UK. I know Philips used to make them, but where I'd buy a few only knows. Google is your friend. neon, bulb, lamp, radioactive, and "dark effect" are good

Re: [volt-nuts] Neon bulbs for HP 3420B or 419A chopper circuit

alf Of Charles Steinmetz Sent: 17 November 2017 08:12 To: volt-nuts@febo.com Subject: Re: [volt-nuts] Neon bulbs for HP 3420B or 419A chopper circuit Pete wrote: > I've seen 95V but nothing as high as 125V. > The high brightness ones are usually 95V Neon gas at the typical pressures used

Re: [volt-nuts] Neon bulbs for HP 3420B or 419A chopper circuit

Pete wrote: I've seen 95V but nothing as high as 125V. The high brightness ones are usually 95V Neon gas at the typical pressures used in small lamps ignites somewhere near 200vDC. For this reason, commercial neon bulbs use a mixture of Neon and Argon, which lowers the strike voltage to

Re: [volt-nuts] Neon bulbs for HP 3420B or 419A chopper circuit

ecise voltage measurement > Cc: hp_agilent_equipm...@yahoogroups.com > Subject: Re: [volt-nuts] Neon bulbs for HP 3420B or 419A chopper circuit > > I've seen 95V but nothing as high as 125V. > > The high brightness ones are usually 95V > > http://www.farnell.com/datasheets/57560

Re: [volt-nuts] Neon bulbs for HP 3420B or 419A chopper circuit

measurement Cc: hp_agilent_equipm...@yahoogroups.com Subject: Re: [volt-nuts] Neon bulbs for HP 3420B or 419A chopper circuit I've seen 95V but nothing as high as 125V. The high brightness ones are usually 95V http://www.farnell.com/datasheets/57560.pdf -pete On Thu, Nov 16, 2017 at 6:38 AM

[volt-nuts] Neon bulbs for HP 3420B or 419A chopper circuit

In an earlier post I quoted the following description of the photo-chopper circuit from the 419A manual 4-43. Assume that DS1 lights when the input is applied to T2. Capacitor C1 charges until the oscillator switches the input, and DS1 goes off. When the oscillator switches again, the