Thanks Bob. I've noticed there are many counterfits of even the agilent
GPIB in interface. It appears many of them work just fine too even with
the manufacturer drivers apparently:
https://www.eevblog.com/forum/testgear/flood-of-new-agilent-82357b-gpib-usb-adaptors-on-ebay-the-real-deal/
Crazy
Goldmine electronics- cool site!
~
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On Mon, Aug 12, 2019 at 5:23 AM 'John Rehwinkel' via neonixie-l <
neonixie-l@googlegroups.com> wrote:
> It's pretty good on most voltages. Now I need a good reference for
> resistance. I've been waiting for months for a new
Hi Bill,
I *REALLY* think an off the shelf USB-GPIB interface on a reasonably
current computer will be the way to go. There's so much more involved than
just the hardware interface! Having a system where the various software and
hardware pieces play well together is no small accomplishment.
The one marked TD71 is an OTIS Touch Tube used in elevators. It is a touch
sensitive trigger tube. They are also named 425A5 or 2040. They are similar to
the RCA 1C22.
The 71 in TD71 is probably the voltage drop when triggered. You had to replace
tubes with the same voltage drop to get the
Should have said 1C21, not 22.
/Martin
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Looks like a 1950s vintage elevator pilot lamp. I had one till it fell and
shattered! I may be wrong, but looks close.
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On Mon, Aug 12, 2019 at 2:46 PM Mac Doktor wrote:
>
> On Aug 12, 2019, at 5:30 PM, Nicholas Stock wrote:
>
> Any ideas folks?
>
>
> I can't think
Folks, here's what I have left to offer before the rest go on 'the bay'.
Thanks to those who have already bought some!
Z521M
B-50358
NL-5016
B-5016
B-5032
B-5999
NL-811
NL-50325
NL-5442
B-54364
B-54365
NL-5448
ZM1031
ZM1033
NL5992
PM me if interested as usual
Cheers,
Nick
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> On Aug 12, 2019, at 5:30 PM, Nicholas Stock wrote:
>
> Any ideas folks?
I can't think of the name of that indicator tube, either. One just sold on eBay
but the seller didn't include a stock number (and he has the boxes swapped):
As far as I can tell, GPIB is pretty simple: just a matter of controlling
16 TTL-level signals thru the GPIO pins of your favorite microcontroller,
and the commands themselves are just strings of text characters. The GPIB
cables are pretty cheap at surplus stores, so this should be a rather
Welcome to the Nix folks!
I used to work for 3M in Camarillo and have a few HP-85s. They were popular
in the 80s for lab and automating instruments. Most have HPIB IO
controllers built-in or add ons. I am sure I can get one for you but
shipping may high as they are all made in the US and have
Yes welcome! I love learning stuff you EE types with a lot of experience
have to offer. I'm a computer scientist so we have some things in common
but when it comes to Electrical Engineering I alway know where to come for
help.
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Wow Robert that's really good information. It seems the National
Instruments are the MOST expensive interfaces as well. I was wondering if
the HP/Agilent/Keysight USB interface would be workable as well! I like
their price much better for one thing too! This is great advice because NI
Tyler,
https://www.nixies.us/projects/its1a-clock/
Michail Wilson
206-920-6312
From: neonixie-l@googlegroups.com [mailto:neonixie-l@googlegroups.com] On
Behalf Of Tyler Bourne
Sent: Monday, August 12, 2019 10:54 AM
To: neonixie-l
Subject: Re: [neonixie-l] Just won auction for idk
Welcome to the group!
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I have a few of these tubes as well. I've been looking for a good
schematic for a ITS1A clock.
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Hi Bill,
" I think my next foray into this is getting a GPIB usb interface and
setting up some automated test and data sampling exercises."
Check out Rohde & Schwarz Forum... This has become my instrument control
environment of choice... Python with some nice extensions and tools.
Started
If you have a capacitance meter, you can compare capacitance readings on
this pin vs the same on good tubes.
If the values differ significantly, it suggests the break is closer towards
the pin.
I suspect it's somewhere with the connections to/from the internal 'circuit
board'. Tapping the tube
40+ years of experience as an EE. My very first electronic project that
actually worked was a vacuum-tube amplifier, and their warm glow has stayed
close to my heart.
Worked as an engineer all my life, with the exception of a brief stint in
administration. But as a hobby, I've never abandoned
After 3 years I finally managed to test the tubes. The good news: 7 seem to
be ok so I can start designing the board. The bad news: 1 has a broken
connection on segment 2. I’ve applied some heat to the pin, but I think
there is no way to fix it. I got 3 tubes with Burroughs label, 4 with
Thanks John these looks great. Vishay seems to make nice ones with low
ppm/degree C and low tolerance. A few of these across the ohms range would
work great for home calibration lab.
Bill
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> It's pretty good on most voltages. Now I need a good reference for
> resistance. I've been waiting for months for a new dmmcheckplus but
> apparently the seller has sold all his business to someone else. They
> useVishay type PTF56 for ohms reference.
Goldmine Electronics has some nice
You're right Martin. I really like the way HP built their gear back in the
70's and 80's. They really over engineered everything. It's hard not to
love! I have a Keithley 195A as well and it's way way off on its
calibration. Just goes to show how different and also non-trivial cal can
be.
Nice!
Always good when instruments can be repaired.
I learned something at a previous job that I didn’ think about previously and
that is that a calibrated instrument is no proof for that it makes correct
measurements after it has been calibrated, the calibration only shows that up
to that
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