Does anyone know what is the thickness of the leads on the IN-13? I haven't
received the ones I ordered yet so I can't measure it and I couldn't find
anything online.
On Thursday, May 9, 2024 at 1:54:39 PM UTC-4 Mac Doktor wrote:
> On May 7, 2024, at 9:55 PM, Zachary <zacharyl...@gmail.com> wrote:
>
> Yes that does in fact confuse me even more.
>
>
> I must be psychic.
>
>
> However I looked at the component list from the source of the image you
> sent ("M. Moores' Nixie Thermometer Kit") and he does use 1/4W resistors
> and not >1W like the Russian datasheet indicates so that's good.
>
>
> I have the thermometer. It's designed to only travel halfway up the IN-13.
> Seeing as how 140V x 4.5mA = 0.63W, perhaps Mike's playing it safe with the
> current. Or it may play nicer with "bad" ones.
>
>
> I'm not sure what I need for Q2 however. Should I use a second MJD340
> (which is the SMD version of the MJE340 I've seen on many existing design)
> or any transistor will do? Or do I need it at all? Many designs don't
> include it for some reason.
>
>
> Mike seems to be a fan of discrete circuits so there must be some magic
> going on here. You should ask him.
>
>
> My understanding is that it's there for because of this from the Russian
> datasheet:
>
> > "To avoid braking the light column when switching abruptly, we
> recommend: When switching on, the main cathode should not be on, and there
> should only be current on the auxiliary cathode."
>
>
> I'm not sure that I've ever seen it actually done that way.
>
>
> Terry Bowman, KA4HJH
> "The Mac Doctor"
>
> https://www.astarcloseup.com
>
> "Every kid starts out as a natural-born scientist, and then we beat it out
> of them. A few trickle through the system with their wonder and enthusiasm
> for science intact."—Carl Sagan, *Psychology Today*, 1996
>
>
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