Michel tries to shoot holes in the advice from David Forbes
to have a look at the SN75468 as an alternative for MPSA42's.
Unfortunately, Michel seems not to notice that most of the
time he talks out of his arse. Luckily, there are folks pointing
out to him there is room for improvement. Indeed, that is
pointing out errors and helping each other. Have to admit
we're a fine group, don't you agree? ;-)
Cheers, Frank
-----Oorspronkelijk bericht-----
From: Lucky
Sent: Monday, February 27, 2012 8:03 PM
To: neonixie-l
Subject: [neonixie-l] Re: Important Lesson Learned Today...
[snip]
All I would say guys is..Lighten up a bit, relax, discuss our hobby
without the snide remarks or chest beating, allow someone to have a
different opinion, point out errors in thinking because you/we want to
help each other, you know all the normal stuff that we do after
graduating sandpit lol. (Mountains and Molehills comes to mind) Either
way I thank you all for sharing your knowledge and learn a little bit
every time.
Regards, Dave.
On 27 Feb, 11:48, Nick <[email protected]> wrote:
On Feb 27, 11:21 am, Cobra007 <[email protected]> wrote:
> In short,
> Take a look at Geert's clock
> here:http://www.dos4ever.com/geert/geert.html
> Now, I do not know Geert but it seems to me he knows quite well what
> he is doing. Check the HV power supply he uses for his clock and
> estimate what the DC voltage will be.
...and he explicitly uses 400V cathode drivers (BF487), states the
safety issue and isolates the clock in a suitable box.
Just so you know for the future, Geert is the son of the sites author
(Ronald Dekker), who works for Philips as is extremely well known
here.
> Or else, how about this
> one?http://www.geocities.ws/podernixie/nixie/index-en.html
Simply a dangerous design. Should never be built.
> Or, jee (although through a transformer), another
> one:http://www.ledsales.com.au/kits/in14_clock_instructions.pdf
...who uses 300V cathode drivers (MPSA42).
I'm not sure what your beef is here - as has been stated by others,
generally nixies are driven by about 180-200VDC. All you've uncovered
in your examples are two good designs which use drivers with suitable
Vceo, and one dangerous design which has no isolation and overdrives
the cathode switches.
Look, If you want to drive your nixies from 500V, then use suitable
drivers. If, like probably 95% of the population you use about
180-200V to drive them, then 100V Vceo is fine. If you use 100V Vceo
drivers and 300V on the anodes, then frankly you deserve all you get -
this is the danger of the Internet...
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