Re: [neonixie-l] Pulsed DC vs direct DC in cathode poisioned

[JohnK]

err, watch the potential there. Scope earthed/grounded? Scope floating? HV 
supply earth/gnd referenced?


Maybe a different technique for a non-EE?

John K

- Original Message - 
From: "Instrument Resources of America" 

To: 
Sent: Tuesday, May 30, 2017 9:30 PM
Subject: Re: [neonixie-l] Pulsed DC vs direct DC in cathode poisioned



No need to lift the anode resistor. Just place a scope across it, and
measure the voltage pulses, and then calculate the pulse current.   Ira.


On 5/29/2017 10:08 PM, Trumpeter wrote:
If I lift the annode resistor I can take a measurement in line between 
the resistor and where it is soldered to the board no? Maybe I'm doing 
this wrong?




--
You received this message because you are subscribed to the Google Groups 
"neonixie-l" group.
To unsubscribe from this group and stop receiving emails from it, send an 
email to neonixie-l+unsubscr...@googlegroups.com.

To post to this group, send an email to neonixie-l@googlegroups.com.
To view this discussion on the web, visit 
https://groups.google.com/d/msgid/neonixie-l/d8b3ae86-d0c9-8980-8108-c9ca01a12e70%40HUGHES.NET.

For more options, visit https://groups.google.com/d/optout.



--
You received this message because you are subscribed to the Google Groups 
"neonixie-l" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to neonixie-l+unsubscr...@googlegroups.com.
To post to this group, send an email to neonixie-l@googlegroups.com.
To view this discussion on the web, visit 
https://groups.google.com/d/msgid/neonixie-l/3EEA30EF69704431906F9E1466A5369D%40compunet4f9da9.
For more options, visit https://groups.google.com/d/optout.

Re: [neonixie-l] Pulsed DC vs direct DC in cathode poisioned

[Paul Andrews]

Maybe you just have a bad wall wart. It would be a cheap and easy test to buy 
another. Not all wall warts are created equal. They can be poorly regulated, 
noisy and what it says on the label can be an outright lie. I know you have 
tested the current, but I still think it would be worth a try. 

-- 
You received this message because you are subscribed to the Google Groups 
"neonixie-l" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to neonixie-l+unsubscr...@googlegroups.com.
To post to this group, send an email to neonixie-l@googlegroups.com.
To view this discussion on the web, visit 
https://groups.google.com/d/msgid/neonixie-l/c7de3bce-939f-42f2-83f0-dc192674e780%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

[neonixie-l] Re: New soldering station... Happy chappie...

[Robert L]

For anyone not noticing the difference, the WESD51 is the digital version 
of the WES51. Well worth the modest bump up in price...

B

-- 
You received this message because you are subscribed to the Google Groups 
"neonixie-l" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to neonixie-l+unsubscr...@googlegroups.com.
To post to this group, send an email to neonixie-l@googlegroups.com.
To view this discussion on the web, visit 
https://groups.google.com/d/msgid/neonixie-l/9ad3152d-0e4d-4afc-a434-86e21c73bfd4%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

[neonixie-l] Re: New soldering station... Happy chappie...

[Robert L]

Bought my Metcal stations on eBay during the telecom downturn... WAY below 
$800 per station... Really glad to have them.

That said, I previously bought a few of the WES51 for work and they do well 
out of the box for around 0805 and up... at least for me. Your mileage may 
vary.

Still... Thought about what you said and just ordered a few of the very 
finest tips I could find for the WES51.

2 each of the following from Techni-Tool for $4.10/ea plus $5.95 
shipping... somewhat less expensive than the Metcal gear!

>   272TI186 Weller Soldering Tip, 1/64", Single Flat, ET Series

>   272TI168 Weller Soldering Tip, 0.015", Long Conical, ET Series

Will report back on how they work for me. Optimistic!

B

-- 
You received this message because you are subscribed to the Google Groups 
"neonixie-l" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to neonixie-l+unsubscr...@googlegroups.com.
To post to this group, send an email to neonixie-l@googlegroups.com.
To view this discussion on the web, visit 
https://groups.google.com/d/msgid/neonixie-l/bc4cd965-260c-4953-9b9d-5fe31718c138%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

Re: [neonixie-l] Pulsed DC vs direct DC in cathode poisioned

[Trumpeter]

I'm not sure what could be wrong with the clock that would cause the cathode 
poisioning.  I have measured 5mA to the annodes which is in spec. The hv PSU is 
cranking outhe 170v. What else should I check? 

-- 
You received this message because you are subscribed to the Google Groups 
"neonixie-l" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to neonixie-l+unsubscr...@googlegroups.com.
To post to this group, send an email to neonixie-l@googlegroups.com.
To view this discussion on the web, visit 
https://groups.google.com/d/msgid/neonixie-l/e68a0846-5d97-49db-9589-5d383d0824a3%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

Re: [neonixie-l] Pulsed DC vs direct DC in cathode poisioned

['Terry S' via neonixie-l]

If the tubes show signs of poisoning within hours, something is seriously 
wrong with the tubes, not the clock.

I have a Nixichron that ran for many years, and some of the tubes started 
to show poisoning symptoms very gradually over time. Jeff sent me info on a 
hardware update, as well as advice on how to de-poison the tubes. It took a 
tad of rework and a few hours total time. The rework lowered the anode 
resistor value and raised the high voltage, so the tubes ran a little 
"hotter", but the poisoning has not returned at all. And I completed that 
rework at least five years ago. The clock is running strong and I expect it 
will for many more years. I run it 7 hours/day, and not at full brightness.

I did have one tube fail... what looked like poisoning was in reality a 
slow gas leak. Probably a result of my removing the tubes from rigid 
sockets.

The Nixichron has no anti-poisoning routine. I've run across numerous 
clocks that do, but some don't up the brightness to max during the routine. 
So I find that of questionable value. Others do up the brightness... don't 
put those clocks in your bedroom.

Terry

On Tuesday, May 30, 2017 at 7:38:34 AM UTC-5, Luka C wrote:
>
> @Ira, I think he already mentioned that he does not own a scope. If we 
> knew the model of the clock, maybe there would be someone who knows such 
> data from the firmware of the clock. Btw, if the tubes are NOS and have 
> been running since January 2017, then there is something seriously wrong 
> with the mentioned clock? Does it have anti-cathode poisoning routines 
> activated and how often?

-- 
You received this message because you are subscribed to the Google Groups 
"neonixie-l" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to neonixie-l+unsubscr...@googlegroups.com.
To post to this group, send an email to neonixie-l@googlegroups.com.
To view this discussion on the web, visit 
https://groups.google.com/d/msgid/neonixie-l/a2daa453-783b-443e-b908-8812724d541b%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

Re: [neonixie-l] Pulsed DC vs direct DC in cathode poisioned

[Trumpeter]

Slot machine effect every 10min. Tubes were NOS but I wonder if I got a bad 
batch. I guess I should buy a scope, any reccomendations for an economical 
model that will get the job done?

-- 
You received this message because you are subscribed to the Google Groups 
"neonixie-l" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to neonixie-l+unsubscr...@googlegroups.com.
To post to this group, send an email to neonixie-l@googlegroups.com.
To view this discussion on the web, visit 
https://groups.google.com/d/msgid/neonixie-l/380294f8-d0c3-4e3a-83ff-bc2d21a44dcd%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

Re: [neonixie-l] Pulsed DC vs direct DC in cathode poisioned

[Instrument Resources of America]

Sorry!!! I guess that I'm not paying attention!!  ;>(   Ira.


On 5/30/2017 5:38 AM, Luka C wrote:

@Ira, I think he already mentioned that he does not own a scope. If we knew the 
model of the clock, maybe there would be someone who knows such data from the 
firmware of the clock. Btw, if the tubes are NOS and have been running since 
January 2017, then there is something seriously wrong with the mentioned clock? 
Does it have anti-cathode poisoning routines activated and how often?



--
You received this message because you are subscribed to the Google Groups 
"neonixie-l" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to neonixie-l+unsubscr...@googlegroups.com.
To post to this group, send an email to neonixie-l@googlegroups.com.
To view this discussion on the web, visit 
https://groups.google.com/d/msgid/neonixie-l/429cae1d-f138-85ae-22dc-c85024ff48a2%40HUGHES.NET.
For more options, visit https://groups.google.com/d/optout.
<>

Re: [neonixie-l] Pulsed DC vs direct DC in cathode poisioned

[Luka C]

@Ira, I think he already mentioned that he does not own a scope. If we knew the 
model of the clock, maybe there would be someone who knows such data from the 
firmware of the clock. Btw, if the tubes are NOS and have been running since 
January 2017, then there is something seriously wrong with the mentioned clock? 
Does it have anti-cathode poisoning routines activated and how often?

-- 
You received this message because you are subscribed to the Google Groups 
"neonixie-l" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to neonixie-l+unsubscr...@googlegroups.com.
To post to this group, send an email to neonixie-l@googlegroups.com.
To view this discussion on the web, visit 
https://groups.google.com/d/msgid/neonixie-l/62b1343e-8fab-4a3b-a94a-ec8360ba3bdb%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

Re: [neonixie-l] Pulsed DC vs direct DC in cathode poisioned

[Instrument Resources of America]

No need to lift the anode resistor. Just place a scope across it, and 
measure the voltage pulses, and then calculate the pulse current.   Ira.



On 5/29/2017 10:08 PM, Trumpeter wrote:

If I lift the annode resistor I can take a measurement in line between  the 
resistor and where it is soldered to the board no? Maybe I'm doing this wrong?



--
You received this message because you are subscribed to the Google Groups 
"neonixie-l" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to neonixie-l+unsubscr...@googlegroups.com.
To post to this group, send an email to neonixie-l@googlegroups.com.
To view this discussion on the web, visit 
https://groups.google.com/d/msgid/neonixie-l/d8b3ae86-d0c9-8980-8108-c9ca01a12e70%40HUGHES.NET.
For more options, visit https://groups.google.com/d/optout.
<>

[neonixie-l] Re: Beam trapping voltage

[Oscilloclock]

That's very interesting - so this is similar to deflection blanking, but 
without a special deflection blanking electrode? It's designed such that the X 
electrodes provide that function, and you just intentionally drive the beam 
into one of the plates?

Aaron

-- 
You received this message because you are subscribed to the Google Groups 
"neonixie-l" group.
To unsubscribe from this group and stop receiving emails from it, send an email 
to neonixie-l+unsubscr...@googlegroups.com.
To post to this group, send an email to neonixie-l@googlegroups.com.
To view this discussion on the web, visit 
https://groups.google.com/d/msgid/neonixie-l/a48e13ac-33f6-4245-85cc-5152f3ca5afc%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.