Author Topic: Lets see your Nixie Tube equipment  (Read 74214 times)

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Offline TERRA Operative

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Re: Lets see your Nixie Tube equipment
« Reply #375 on: May 29, 2019, 01:15:45 am »
he pulls out what's in the second picture.  ARE YOU KIDDING ME ?  The service manual for one of the most obscure pieces of equipment.  It looked like it
never was opened.  I could not, in good conscience, not give the Vidar a chance to be functional.  ::)

That's worth scanning to PDF for the archives for sure. :)
Any circuit design must contain at least one part which is obsolete, two parts which are unobtainable, and three parts which are still under development.

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Offline bob91343

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Re: Lets see your Nixie Tube equipment
« Reply #376 on: May 29, 2019, 03:26:25 am »
This is my EI3000 voltmeter.  Rated 0.01% on dc and 0.1% on ac, still works great.
 
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Online tggzzz

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Re: Lets see your Nixie Tube equipment
« Reply #377 on: May 29, 2019, 08:44:57 am »
Yea i have a soft spot for nixies... so fresh into the lab... a Solartron LM1619 volt meter and the nixies are not the only tubes in it

oh and 1KV on unshrouded banana sockets? i guess things was different back then! :-+ :-DD

I'll raise you dekatrons plus 200-500V output plus finger accessible plus school equipment... With the EHT switched on, touching the GM socket's centre conductor with a finger causes it to count.



No, you don't feel a shock since the output impedance is ~5Mohm :)
« Last Edit: May 29, 2019, 08:46:54 am by tggzzz »
There are lies, damned lies, statistics - and ADC/DAC specs.
Glider pilot's aphorism: "there is no substitute for span". Retort: "There is a substitute: skill+imagination. But you can buy span".
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Offline Enigma-man

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Re: Lets see your Nixie Tube equipment
« Reply #378 on: May 30, 2019, 02:40:02 am »
Wow ! Dekatrons. My favourite next to Nixies.
I sure wish I could find a schematic for a low frequency counter because I have more than a dozen Dekatrons and have
no intention to make shitty Dekatron spinners out of therm.  ;D

 # bob91343... Very nice to see some rare pieces of equipment.
« Last Edit: May 30, 2019, 02:42:58 am by Enigma-man »
 

Offline Enigma-man

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Re: Lets see your Nixie Tube equipment
« Reply #379 on: May 30, 2019, 02:47:33 am »
Vidar 500 Voltmeter revisited.

I got the Vidar 500 fixed last night and here are two pix showing it measuring voltage compared to my Dana 5330
and frequency compared to the HP 5340.
The Vidar had several issues, but no collection of Germanium transistors, resistors and caps was going to defeat me.
It works and that was my goal.  The only one left to fix is the Systron Donner 1032 and it will be work again.
 
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Online tggzzz

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Re: Lets see your Nixie Tube equipment
« Reply #380 on: May 30, 2019, 07:59:33 am »
Back in February this year, my good buddy gave me a Weston Standard Cell.  Up until the mid 90's the Weston Cells were the worldwide voltage standard.
on the net.  A new Weston Cell was 1.01830 volts.  The cell is only supposed to be guaranteed accurate for a number of years but I have read some are still good after many decades.

There are two types of Weston standard cell: saturated and unsaturated, with different voltages and tempco and lifetimes.

Saturated cells are stable for decades (I have one from 1949), have a 40uV/C tempco, are fragile, so are only used in labs. Your image shows one.

Unsaturated cells have lower tempco, are more robust, have a shorter lifetime, and were used in portable equipment.
There are lies, damned lies, statistics - and ADC/DAC specs.
Glider pilot's aphorism: "there is no substitute for span". Retort: "There is a substitute: skill+imagination. But you can buy span".
Having fun doing more, with less
 

Offline bitseeker

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Re: Lets see your Nixie Tube equipment
« Reply #381 on: May 30, 2019, 05:10:21 pm »
The Vidar lives! :-+
I TEA.
 

Offline schmitt trigger

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Re: Lets see your Nixie Tube equipment
« Reply #382 on: May 30, 2019, 05:34:54 pm »
My ultimate idiot box: Nixies, Dekatron, Neon lamps, and a Magic eye. All counting in random sequences.
All synchronized with beeps.

A real mind-relaxing apparatus, very effective for dealing with headaches caused by stubborn people.
 
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Offline bitseeker

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Re: Lets see your Nixie Tube equipment
« Reply #383 on: May 30, 2019, 06:58:03 pm »
Awesome. A video demo is requisite for this curiosity. ^-^
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Offline schmitt trigger

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Re: Lets see your Nixie Tube equipment
« Reply #384 on: May 30, 2019, 11:57:35 pm »
I would love to share a video, but EEVBLOG doesn’t allow uploading videos?

BTW; I have called this contraption “Der sinnlose Zähler”. The senseless counter. Although I ignore whether my German language skills are good enough and this name makes any sense.

Or perhaps “The ultimate idiot box”, again in German.
Perhaps some native German speakers may suggest a catchy name? That would be appreciated.
« Last Edit: May 31, 2019, 12:02:42 am by schmitt trigger »
 

Offline bitseeker

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Re: Lets see your Nixie Tube equipment
« Reply #385 on: May 31, 2019, 01:19:33 am »
No problem. Video goes on YouTube. Link to video goes into EEVblog forum post.
I TEA.
 

Offline greytop

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Re: Lets see your Nixie Tube equipment
« Reply #386 on: September 13, 2019, 09:45:50 am »
I have just dug a Daystrom Schlumberger 1291 out, tried it 30+ years ago, functioned then. Must try it again
 

Offline mikeinkcmo

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Re: Lets see your Nixie Tube equipment
« Reply #387 on: September 29, 2019, 12:21:10 pm »
I've scrolled through all the pages and haven't seen an HP-312 selective volt meter. 



I also have a 5245M counter that I've had for quite a while.

 
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Offline Johnny10

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Re: Lets see your Nixie Tube equipment
« Reply #388 on: September 29, 2019, 01:45:54 pm »
Now those are cool !
Tek TDS7104, DMM4050, HP 3561A, Tek 2465A, HP8903B, DSA602A, Tek 7854, 7834, HP3457A, Tek 575, 576, 577 Curve Tracers, Datron 4000, Datron 4000A, Fluke 181 Nanovoltmeter, Dos4Ever uTracer, HP5335A, EIP534B 20GHz Frequency Counter, TrueTime Rubidium, Sencore LC102, Tek TG506, TG501, SG503, 1062LS101
 


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