Follow up. The pinkish colored alloy wire that I was thinking of was
"Dumet". If I can find/think of the other major alloy that Sylvania used
on the Loktal tubes I'll publish it here, but don't hold your breath!!
Ira.
On 1/1/2025 12:41 PM, Instrument Resources of America wrote:
There were at least TWO special alloy wires used to come through the
glass, both of which had the same rate of expansion and contraction,
for what should be obvious reasons. One alloy was a pinkish color. I
forget the names of both, and I apologize for that.
On 12/31/2024 7:15 PM, Leroy Jones wrote:
One thing that bothers/worries me about all of these modern-day nixie
tubes is the fact that the base is GLUED on to the envelope.
Over the years I have seen plenty of older tubes (not nixies) that
had glued bases and the base always eventually comes loose.
I have had several old Western Electric ballast lamps that had the
base come loose. Luckily the lead wires stayed intact and I was able
to re-glue the base to the envelope using cyanoacrylate (aka "super")
glue. So I honestly think that this is what we are in for with these
modern-day so-called "nixie" tubes. In other words, wait 20 or 30
years and then the base comes loose. In my humble opinion, the
nixie tube makers
really need to re-learn the skill of sealing good pins to the glass
like they used to do. It cannot be that tough of a skill to master.
After all millions upon millions of all different types of vacuum
tubes were made this way. I think they are using a plain pinch
with wires
coming out then soldered to a fake little PC board is kind of an easy
cop-out they are using to get tubes out the door fast instead of
making them
properly. Yes, I have a problem with these new tubes. They are not
genuine.
On Tuesday, December 31, 2024 at 9:25:45 AM UTC-5 Adam Piórko wrote:
The option of an MCU on the PCB is not a bad idea. I dream of a
PCB with control via I2C bus or shift registers. The only problem
is that the B8971 is about the size of an IN-18, and I doubt
there would be space for anything other than traces to the pins :)
Most likely, the board will have a hole through which the leads
from the tube will pass and need to be soldered to the PCB – and
that takes up space...
wtorek, 31 grudnia 2024 o 11:29:16 UTC+1 newxito napisał(a):
I’m still interested, I have no problem with the small PCB
approach.
They could add a 50 cents MCU to the PCB for storing the
serial number and counting the operating hours, of course all
data accessible from my clock... just kidding...
Richard Scales schrieb am Dienstag, 31. Dezember 2024 um
05:18:14 UTC+1:
A slight update:
Whilst the manufacturer has made the DGM01 tube with
glass sealed pins at the base - the preferred approach
seems to be, like other manufacturers, to use the small
PCB at the base.
This is to mitigate against leakage around the pins in
the glass base which whilst was once a common place
manufacturing step (back when tube production was
massive) but now appears to be a technique that has been
lost in the sands of time.
So, that is the current thought.
The base absolutely positively has to match the existing
B8971 for compatibility purposes.
A lot more research has yet to be done and I will report
all progress here.
In the meantime - thank you all for your support. It is
clear that there is demand for such a thing - even if
only in the 100's. I look forward to updating you all
when I know more.
- Richard
On Monday, 30 December 2024 at 23:30:16 UTC Bill Stanley
wrote:
Hi Richard,
Add me for 6 of the tubes.
-Bill-
*From:* Richard Scales
*Sent:* Saturday, December 28, 2024 10:34 PM
*To:* neonixie-l
*Subject:* [neonixie-l] B-87971 tubes
Hello,
I am in discussion with a tube manufacturer regarding
the implementation of a B-8971 replacement tube.
It seems that the idea is fully achievable though I
would need to order 100 units of the first batch in
order to make it happen.
Naturally I am asking to see if anyone would be
interested in committing to the purchase of a number
of tubes to see if I can get an order for 100 units
together.
Please let me know if you might be interested, the
target price for the first should be close to
$75+whatever duties and taxes are applied. Thereafter
the price could get much closer to $50+taxes etc.
Just let me know.
- Richard
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