Well the facts are that the National NL-6844A tubes always test much better
than the Burroughs versions do.
I know they are not ideal tubes. No mercury. Limited lifetime. But they do
look cool especially on a clock
that has them poking out the front.
Chuck
Original Message
I wonder if this works? My posts have not been showing up for a long
while now.
-Chuck
Original Message
From: "'neonixie-l' via neonixie-l"
Sent: 9/19/2023 11:59:27 AM
To: "neonixie-l"
Subject: [neonixie-l] Test
Maybe 5972 is mercury version of non-mercury 5971?
Original Message
From: "Audrey"
Sent: 9/5/2023 2:14:48 PM
To: "neonixie-l"
Subject: Re: [neonixie-l] Re: B-5972
I have one of these aswell- at least, it was
Could someone please send me a link to a picture and/or a
description/datasheet for this DTF 104B numtron tube?
What is so special about it? I might be interested in getting a few of
these if I can know more about them.
Thank You. Chuck
dead tubes were put into the boxes of their
replacement tubes instead of being thrown out like they should have been. At
least that's the conclusion I came to when buying thrm on eBay 20 years ago.
On Thu, Sep 22, 2022, 10:4
Does anybody here know why so many of the Burroughs B-6844 tubes found
"untested" on Ebay are dead?
Conversely, I have found that a much better bet for untested 6844A
tubes are the National NL-6844A ones.
Those seem tio always have a much better chance of still being
I generally check the tightness of fit of each pin before inserting a
tube into a socket. I have a routine method of loosening the grip of each
socket fork on the
tube pin. I use a tapered solder probe to loosen them up. Then I
check each one. Then I use a junk tube at
I have some chinese tubes with long wire leads. Those got soldered to
a 14-pin DIP header. Then plug those into a DIP ic socket.
Original Message
From: "David Pye"
Sent: 8/25/2022 5:02:50 PM
To: neonixie-l@googlegroups.com
Or you can simply add a toggle switch on the clock front that
disconnects the high voltage to the tubes.
That way the clock runs dark until someone turns on the tubes. Turn
the tubes off when you leave the room.
Easy. Simple. Effective.
Back about 20 years ago, I got a bunch (about 30) B-7971 tubes from an
ebay seller who shipped them wrapped in newspaper.
Those papers are very old, they have 1968 dates. I paid around $11
per tube, a few as high as $17 per tube.
I built a 16-tube scrolling array
How many of the NL-5018 do you have? What is the price for them?
Original Message
From: "Nicholas Stock"
Sent: 4/17/2022 3:06:21 PM
To: "'Greg P' via neonixie-l"
Subject: [neonixie-l] Re: Symbol Nixies for Sale
I distinctly remember some of Dalibor's first tubes from mnay years ago
when he first started experimenting.
He made one that looked a lot like this one. Nice Work!
Chuck
Original Message
From: "joshua dejaen"
om
Subject: Re: [neonixie-l] Re: Please help identifying a nixie tube.
Could be an IN-4, I’m pretty sure those can be used as biquinary tubes.
> On Sep 18, 2021, at 2:35 PM, chuckrr wrote:
>
> almost
--
You received this message because you are subscribed to the Google Groups
With a 14 pin driver IC, this has almost certainly GOT TO BE a
bi-quinary style nixie.
Original Message
From: "Bartek Ogryz"
Sent: 9/18/2021 5:08:31 PM
To: "neonixie-l"
Subject: Re: [neonixie-l] Re: Please help identifying a
I have one of John Taylor's prototypes in a nixie clock I scratchbuilt
in 2010 that uses (6) National NL-6844A tubes.
It has been running perfectly since that time. Highly recommended!
Top quality work.
Original Message
From: "Richard
NIce! I bought a similar one 25 years ago at the Orlando, FL hamfest
out in the parking lot for $5.
Made by CMC. Got it home, was going to scrap for parts but powered it
up only to find that it works just fine!
Super accurate frequency counter, it has the reference
David, I need to consult you about the rubidium oscillator. I am
wanting to set one up. Can you offer any hints or tips
on dividing down the osc. Freq. (10 mHz, I think it is, and typically
powered by 24 volts DC). Any of your thoughts
will be helpful.
Got my 807 stash from Antique Electronic Supply in Phoenix, AZ about 20
years ago. Went there in person for a visit.
Bought most of what they had. The 807s were $8 each then. My first
clock has 807's for hours and minutes, with the seconds being 803's.
David, How come you never answer any of my questions about the
rubidium oscillator? I have asked you about it many, many times and have never
received any response from you. -Chuck
Original Message
From: "David Forbes"
Sent:
7 Terry Bowman wrote:
On Apr 1, 2021, at 8:52
Makes perfect sense. Thank you. So far I've used op amps for a few
simple things but still need lots of study and practice to become more
proficient with them.
To date my experience with op amps has all been cookie-cutter cookbook
applications. They work, but much more
David,
Since you responded to my question about LM-324, I have another thing I
need to consult you about:
I have tried several times to contact you at your nixiebunny emal
address with no response back.
What this is in reference to is my
to ground with a 10K resistor, float the unused outputs.
Bill
-Original Message-
From: neonixie-l@googlegroups.com [mailto:neonixie-l@googlegroups.com] On
Behalf Of chuckrr
Sent: Thursday, April 01, 2021 8:53 AM
To: neonixie-l@googlegroups.com
Subject: [neonixie-l] LM-324 op amp
What i
rd way is to connect it as a unity gain buffer. Connect the
non inverting input to Gnd and connect the inverting input to the output.
On Thu, Apr 1, 2021, 5:53 AM chuckrr
wrote:
What is standard procedure for tying off
Using LM-324 because I have them here and they work extremely well in
the application.
Original Message
From: "peter bunge"
Sent: 4/1/2021 10:25:42 AM
To: neonixie-l@googlegroups.com
Subject: X-IMail-SPAM-Connection Re:
What is standard procedure for tying off unused op-amp inputs?
If for instance there is a circuit which uses only (2) of the (4) available
op-amps in a DIP package,
what is the normal protocol for dealing with these unused units?
Can the unused inputs just be left floating? Doing do on an
e a real 5
On Tue, Mar 30, 2021, 4:16 PM chuckrr
wrote:
So does the IN17 have the real digit 5 or the lame
upside down digit 2 as a 5?
I see pictures showing both thing
So does the IN17 have the real digit 5 or the lame upside down digit 2
as a 5?
I see pictures showing both things. Which is it?
Original Message
From: "tntmod54321"
Sent: 3/30/2021 2:46:04 PM
To:
That schematic is so wrong in so many ways. You need high voltage
transistors operating the tube cathodes.
You need high resistance drving the transistor bases. You need a
buffer such as 4049 or 4050 driving the
resistor, which in turn drives the transistor base.
Well even thoughe electricity flowing through a wire is somewhat slower
than the speed of light, exactly how much slower
is something I do not know about. What I do know is that the
approximation of it being "around" the speed of light has served me
very well over
A handy way I use, to remember the approximate speed of light, which is
also the approximate
speed at which an electrical signal travels in a wire is just to think
of it
as 1 nanosecond per foot. Approximately.
Original Message
yep, I seem to recall those are ceramic
Original Message
From: "Nicholas Stock"
Sent: 12/12/2020 2:01:32 PM
To: neonixie-l@googlegroups.com
Subject: Re: [neonixie-l] Ceramic Driver ICs
Weren't
While I am on this subject, I figured it might not hurt to ask if
anyone here in our group might have a few
fully functioning 6844A tubes available for sale. Thanks. -Chuck
--
You received this message because you are subscribed to the Google Groups
A few weeks ago I bought (2) NOS, NIB National NL-6844A nixies from an
ebay seller.
When those arrived they got tested and both work perfectly. -Chuck
Original Message
From: "Paul Andrews"
Sent: 12/11/2020 3:19:41 PM
To:
@gregebert: 6844A is a non-mercury tube. It has a relatively short
lifespan, and yes, one of its properties is that
during use, the cathode material does get deposited on the glass.
They do silver up quite noticeably over several years of use.
They also get
Thank you for the responses so far. What interests mwe the most about
all of this, is that this is making me wonder exactly what it is
that determines initially when the tube is brand new, the difference
between the bond wires and the actual digit cathodes. Upon close
Burroughs 6844A is domed not flat. I also have some National
Electronics NL-6844A tubes. Frankly, I have had much better
luck with the National Electronics brand. This recently purchased
batch of (8) Burroughs 6844A tubes is a bad batch.
The boxes all are stamped
I would like to ask the group about an experience I am having with a
batch of (8) Burroughs 6844A nixies just purchased.
They are new in box from 1968. All have same date stamp Mar 4, 1968.
As far as I can tell they have never been out of
these original boxes. I
They work fine.
Original Message
From: "Michail Wilson"
Sent: 10/31/2020 2:41:05 PM
To: "neonixie-l@googlegroups.com"
Subject: RE: [neonixie-l] K155ID1 keep or sell?
It's a 9368
-Original Message-
From: "gregebert"
Sent 12/3/2019 11:47:53 AM
To: "neonixie-l"
Subject: [neonixie-l] Re: 7 Segment Common Anode Display
Reduce the resistors to increase the LED segment current. I assume you are
doing 8:1 multiplexing, so each digit is only on for
For a very long time, some years ago, the owner of that place
Walter Shawlee was bidding on every possible nixie on ebay.
He'd get them as cheaply as possible, then jack them way up to sell
on that Sphere place.
One time when I wanted some from ebay for myself, I emailed Walter and kindly
A typical 7805 regulator drops out at around 7.5 volts at the input.
You'll need a little more overhead than 6.3 volts.
That, in my humble observation, is trying to cut it too close.
-Original Message-
From: "Paul Andrews"
Sent 3/24/2019 7:46:22 AM
To: "neonixie-l"
Subject:
Sounds like you are going to wreck something!
I have a complete (16) tube text-scanning array built with B-7971 tubes.
It's direct drive.
-Original Message-
From: "David Pye"
Sent 1/22/2019 3:44:40 AM
To: neonixie-l@googlegroups.com
Subject: Re: [neonixie-l] Re: Pulsed operation
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