@googlegroups.com [mailto:neonixie-l@googlegroups.com] On
Behalf Of threeneurons
Sent: woensdag 8 februari 2012 8:31
To: neonixie-l
Subject: [neonixie-l] Re: Nixie clock with vacuum tubes
My understanding is that the tube cathodes get damaged, when the tube is in
'cut-off' over an long period of time. Its called
Eric
My cold cathode (using XC18) all-valve clock only works in the light,
the rings fail if the clock is left in the dark. So that clock is now a
demo one only. But it did run without fault if I kept it in the light.
I've bought enough Z700U trigger tubes to build another trigger tube
My understanding is that the tube cathodes get damaged, when the tube
is in 'cut-off' over an long period of time. Its called cathode
interface resistance, which goes up under these conditions, Also
referred to as sleeping sickness, but not the same as with nixies.
Correct.
The tube makers
That sounds like something crazy that I would dowhen I got a few
free thermometer counters.
I guess you mean these ones?
http://nixiekits.eu/NixieTherm.htm
He has quite a few nice tube projects on his name as probably most of
the people here will know.
I should try to get it working
On Feb 7, 3:40 am, Cobra007 mic...@xiac.com wrote:
That sounds like something crazy that I would dowhen I got a few
free thermometer counters.
I guess you mean these ones?http://nixiekits.eu/NixieTherm.htm
He has quite a few nice tube projects on his name as probably most of
the people
Almost any dual triode can be made into a flip-flop, so your 8 transistors
can fit into 4 bottles. Even a 7-pin 6J6 can work, since flip-flops
generally have common cathodes anyway.
Yep, it is a digital circuit, bouncing between cutoff, and saturation.
That said, there is some method to
On 2/7/12 11:29 AM, threeneurons wrote:
Almost any dual triode can be made into a flip-flop, so your 8 transistors can
fit into 4 bottles. Even a 7-pin 6J6 can work, since flip-flops generally have
common cathodes anyway.
Not really. Audio tubes fail in that application.
The computer
On 2/7/2012 12:25 PM, David Forbes wrote:
On 2/7/12 11:29 AM, threeneurons wrote:
Almost any dual triode can be made into a flip-flop, so your 8 transistors
can fit into 4 bottles. Even a 7-pin 6J6 can work, since flip-flops generally
have common cathodes anyway.
Not really. Audio tubes
On 2/7/2012 12:42 PM, David Forbes wrote:
Another dual triode that was common as dirt in computers was the 6211. It's
faster than the 5963. IBM bought millions of 'em from GE 50 to 55 years ago.
Oops, they're not quite a 12AU7. To quote from the IBM 650 computer's
descriptive paper
-Original Message-
From: neonixie-l@googlegroups.com [mailto:neonixie-l@googlegroups.com] On
Behalf Of David Forbes
Sent: dinsdag 7 februari 2012 21:01
To: neonixie-l@googlegroups.com
Subject: Re: [neonixie-l] Re: Nixie clock with vacuum tubes
On 2/7/2012 12:42 PM, David Forbes wrote:
Another
Further one should probably look for subminiature tunes, either triodes or
pentodes, connected as triode.
Yeah, if you're looking for inexpensive tubes that can be had in large
quantities, there are a few Russian tubes that would be a logical choice.
The 6Н16Б-ВИ (6N16B) seems to be
Why almost everybody concentrates on classic thermionic valves?
Trochotrons, dekatrons, including those which can directly drive
nixies or even humble trigger tubes look much more tempting to me.
Flip-flops built from triodes are probably a tad faster but for clock
application it doesn't seem to
On 12-02-07 05:23 PM, John Rehwinkel wrote:
Yeah, if you're looking for inexpensive tubes that can be had in large
quantities, there are a few Russian tubes that would be a logical choice.
There are the old standby series string colour TV tubes. like 4BQ7,
4BZ7, 5J6, - 5T8 is a triple
On Feb 8, 10:07 am, marcin marcin.r.adam...@gmail.com wrote:
Why almost everybody concentrates on classic thermionic valves?
Trochotrons, dekatrons, including those which can directly drive
nixies or even humble trigger tubes look much more tempting to me.
Yes, I totally agree with that, but
].
If/when I re-locate it I'll post a copy.
John K
- Original Message -
From: Tidak Ada offl...@zeelandnet.nl
To: neonixie-l@googlegroups.com
Sent: Wednesday, February 08, 2012 7:11 AM
Subject: RE: [neonixie-l] Re: Nixie clock with vacuum tubes
You're right concerning the type numbers
: [neonixie-l] Re: Nixie clock with vacuum tubes
And on that subject, I have an in-house/tech publication from one of the
tube makers [Mullard?] that states that from a certain date they used the
improved cathode in all their tubes anyway. [The improved cathode was the
one they used in the computer tubes
My understanding is that the tube cathodes get damaged, when the tube
is in 'cut-off' over an long period of time. Its called cathode
interface resistance, which goes up under these conditions, Also
referred to as sleeping sickness, but not the same as with nixies. Its
when the cathode metal and
WOW that is totally cool! It looks even better than what I would have
expected!
He said he's not running the clock all the time because of electricity
bills :-) It looks like it consumes over 0.5kW!!
Fantastic project, thanks for the link!
Michel
On Feb 7, 10:21 am, Adam Jacobs
Scroll down to the third group of links, titled All Tube Nixie
Clocks:
http://threeneurons.wordpress.com/about/
Are you including power supply and timebase in your calculations ?
Actually, the ECC83 (aka 12AX7) is not the best choice for logic. The
ECC82 (12AU7) or ECC81 (12AT7) would be better
Quite a bit of interesting technology there, especially the clock that
is only made with neon bulbs, who would have thought that? Certainly
not me :-)
I came up with this question as I have an old batch counter that uses
discrete transistors for it's BCD counters and decoders.
I came up with this question as I have an old batch counter that uses
discrete transistors for it's BCD counters and decoders.
http://xiac.com/Images/KingNixieBatchCounter.jpg
I was surprised to see so little transistors there.
The BCD boards look to have 8 transistors arranged as four
The BCD boards look to have 8 transistors arranged as four flip-flops. This
makes the decoders easy, as the flipflops have Q and not-Q outputs for each
stage, so a simple wire-and lashup with some diodes will do the trick. Cute
construction with the long narrow board perpendicular to the
Cobra007 wrote:
Quite a bit of interesting technology there, especially the clock that
is only made with neon bulbs, who would have thought that? Certainly
not me :-)
That sounds like something crazy that I would dowhen I got a few
free thermometer counters.
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