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All thransistors of a given part will meet the published specs, but sometimes a circuit needs a Bit more gain (or a bit less) of is right at the breakdown voltage. sometimes folsk will select a part

I've seen it too on an IN-18 with the 4 and 8 cathodes. Jon.

That's going to be mechanically quite tricky. You'll need either two sets of 11-way sliprings, plus a chain-and-sprocket mechanism to keep *each* tube upright and lit, or a "mystery clock" type

When you say British flag do you mean neon displays with segments in a similar layout, albeit sideways, to our dear Queen's naval jack? I have been messing with a display that may fit into this

Can't tell from your description. I had an idea, but since you said you had it working with LEDs (I assume driving the LEDs with the 74141?), my idea couldn't be right. On the other hand, if you were

Shane, Overvoltage wouldn't do that. Look for a short circuit in your wiring between the 5 and 6 cathode pins. If your wiring's OK, then try a different tube; sometimes they have internal shorts. --

the chartertron and the team that made them

look at that MR dave put a "s" on digit ...what a maroon dlw

Wow. ...are you also going to make a one-digit clock with that massive CRT? :-) Dan

thanx this shows me all is working........ the davester westdave!

Nice clocks, Dave, I am always too lazy to actually build a clock. :-) Jens

Mr Dave just posted a whole bunch of photos of never before seen clocks. i have made just about all the neon British flag tubes into clocks, B-7971 ,B-8971 B-5971 neo5000 zm1350 all there some pixie

Sounds like a short to me. It's going to be on the board. Although rare, it's possible that it is the tube. I have only seen this once on an IN-18. It was the 4 and 5. I could see the elements on the

Nothing special about -> HOW <- the transistors are used on the MCU section. You can use just about any small signal NPN & PNP, where specified. Something like the 2N3904 (NPN) & 2N3906 (PNP) will do.

Very nice. Michail Wilson

OK, I got my single tube counter working, sort of. It scrolls through 0-9 perfectly, but when five is on, six lights up to, and vice versa. I assume this is an overvoltage issue, any ideas how, or

[edited by A.J. - please trim quoted material] [non-relevant quoted message deleted] I'm new to this madness, but I've had my own little nutty idea. Still trolling around for the best (simple) power

background: http://xoomer.virgilio.it/1962/ Hello again, Giampaolo, About these transistors, what differences among identically labeled transistors required you to chose one from another? I thought

Hello, googled eyed the computer and found many places for the 2000uf cap. digikey ebay, etc. Of course shipping is the killer. Michail

[edited by A.J. - please trim quoted material]