Re: [neonixie-l] What's the best approach for this?

[Richard Nicewonger]

Hi martin,

Congratulations, that’s a terrific calculator to receive as a gift! The 
high anode voltage required for the display
is generally provided by an inverter powered by the DC input. From the 
pictures, it looks like there is a transformer 
just behind the display. That is likely for the inverter. Look for small 
electrolytics around that transformer, especially
ones that have high operating voltage values. All those should be replaced. The 
yellow ones in front of the display are
probably OK if all digits are visible. I love these kind of calculators and 
hope you get this one in working condition.

All the best,

Rich
 
> On Oct 6, 2023, at 11:22 AM, martin martin  wrote:
> 
> Greetings all,
> I was just given this 1973 Victor calculator.  Uses Beckman Panaplex displays 
> to the tune of 12 digits!.
> 
> The display comes up, but dim.  Should I replace all the caps first?  The 
> power supply is external.  It's sealed up pretty well.  14.5 VDC @60mA.
> 
> Thanks all.
> 
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[neonixie-l] seeking info on obsolete IC's

[Richard Nicewonger]

Hello everyone,

In my obsession with Nixie calculators, I recently acquired a Dietzgen 
ESR-1 which is a rebranded Casio FX-1.
It required the usual replacement of the power supply HV caps and a pass 
transistor and cap in another regulator circuit.
After all that, it is still 95% DOA. This is an early calc using “stone age” 
JMOS logic where a “1” is @ -24V and “0” is GND.
These IC’s are now more than 50 years old and mostly unobtainable. In order to 
troubleshoot anything, I would love to get
any data sheets that could identify IC functions. I have seen some of the more 
common ones online, but there are a few
from NEC such as uPD129C, uPD173D, uPD312C, uPD358C, and from Toshiba HD3113P 
that seem to be elusive.
Could there be any members that have knowledge of these IC’s or the calculator 
itself? Any help would be appreciated.

Thank you,

Rich N.


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Re: [neonixie-l] Show & Tell

[Richard Nicewonger]

Did you check my follow-up message? :-)
> On Sep 29, 2022, at 5:52 PM, Mac Doktor  wrote:
> 
> 
>> On Sep 29, 2022, at 2:14 PM, Rich N. > > wrote:
>> 
>>  Just wanted to share a pix of my latest piece of orange-glowing test 
>> gear!
> 
> No picture here. Or is this just a tease?  8D
> 
> 
> Terry Bowman, KA4HJH
> "The Mac Doctor"
> 
> https://www.astarcloseup.com 
> 
> "Every kid starts out as a natural-born scientist, and then we beat it out of 
> them. A few trickle through the system with their wonder and enthusiasm for 
> science intact."—Carl Sagan, Psychology Today, 1996
> 
> 
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Re: [neonixie-l] identification request :unknown edge lite displays

[Richard Nicewonger]

Hello,
I have a big old General Radio automatic capacitance bridge that uses 
these type of displays plus some that display special characters.
I’ve been looking for some circuits/plans to make a clock with these. When you 
finish your clock project could you post your design plans?
Thank you very much.

Rich

 
> On May 8, 2022, at 3:21 PM, 'Bogdan Paduraru' via neonixie-l 
>  wrote:
> 
> Thank you very much Nigel !
> It looks like they have been in that type of calculator as I have found only 
> 7 of them , for sure the previous owner used 6 for some clock => I will do 
> the same with mine very soon 
> 
> 
> On Sunday, May 8, 2022 at 9:44:27 PM UTC+3 GCNige wrote:
> Similar displays are used in the Canon Canola 130S desktop calculator from 
> the late 1960s, described at 
> http://vintagecalculators.com/html/canon_canola_130s.html 
>  
> 
> Regards,
> Nigel
> 
> On Sunday, May 8, 2022 at 7:07:46 PM UTC+1 Bogdan Paduraru wrote:
> 
> 
> 
> 
> hello gents
> 
> could you please help me identify below displays ? from the left ?
> I did not find anything similar on the web and I have no idea from where they 
> have been pulled:
> They look rather very interesting compared to other types : they have right 
> decimal point and some sort of right separator 
> Thank you 
> 
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Re: [neonixie-l] New find!

[Richard Nicewonger]

When RCA was in its heyday, they promoted their "RCA Institutes” correspondence 
courses in electronics. As part of the course in

TV/radio servicing, the students had to assemble their own test gear. This was 
one of those items. It is actually a rebranded Eico

model 430 oscilloscope from the late ‘60s. I know this since I have the model 
435 which appears similar but has better bandwidth.

I have always liked the looks of this series of test equipment that Eico made 
during this period compared to their earlier designs.

They are simple to use and relatively easy to fix since they don’t have 
sophisticated features like triggered/delayed sweep. It looks

like you’ve scored a nice one. Good luck and enjoy!

Rich




> On Feb 22, 2022, at 9:45 AM, martin martin  wrote:
> 
> Since we are on the subject of CRTs...  I was asked to pickup all kinds of 
> vintage items from an "Estate Giveaway"
> 
> Here's the first one!  More on the way, Heathkit VTVMs too..
> 
> 
> 
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Re: [neonixie-l] El Dorado Frequency Counter Restoration

[Richard Nicewonger]

It sure looks nice sitting there with the “others”.
At my age, you can guess which readout I prefer!
And it seems accurate, too. Very good work.

Rich

> On Feb 6, 2022, at 2:45 PM, martin martin  wrote:
> 
> Restoration completed. Old glue and tape cleaned on the face.  As you can see 
> the numbers look good for a 46 year old counter!
> 
> On Saturday, February 5, 2022 at 1:50:00 PM UTC-8 nice...@optonline.net wrote:
> Thanks for that link Bill. It definitely needs TLC - a lot of it! I’ve never 
> seen that model before, but if you look closely you’ll see that it doesn’t use
> LED’s but rather Panaplex displays (my favorite). Wish it wasn’t rack mount, 
> cheaper and in better shape or I might have went for it just for those 
> displays. Another interesting thing I noticed: rear label shows Eldorado as a 
> subsidiary of E-H International. Never heard of ‘em but I guess they had
> acquired Eldo at some point. My only Eldo is model 1607 counter/timer. This 
> really helps toward my curiosity about that company and I am grateful.
> 
> Rich
> 
> 
>> On Feb 5, 2022, at 2:34 PM, Bill Notfaded > > wrote:
>> 
> 
>> They made a few with LED.  Here's a time interval counter on eBay.  I'd love 
>> one in good condition but this needs too much work!
>> https://www.ebay.com/itm/VINTAGE-Eldorado-Model-797-EI797-R5-Rack-Mount-Tube-Time-Interval-Counter-PARTS-/153900473217?_ul=IN
>>  
>> 
>> 
>> Bill
>> 
>> On Saturday, February 5, 2022 at 11:20:04 AM UTC-7 nice...@optonline.net 
>>  wrote:
>> Hi All,
>> 
>>  Does anyone know whatever happened to Eldorado Electronics? I wonder if 
>> they ever made a counter or DVM that didn’t use Nixies.
>> Don’t recall ever seeing any but maybe the group has some info.
>> 
>> Rich
>> 
>> 
>>> On Feb 4, 2022, at 6:28 AM, Bill Notfaded > wrote:
>>> 
>> 
>>> 
>>> Amazing it looks like it's working fine Martin.  Does anymore know how many 
>>> counters they made?  I have a few but it's my guess they were one of the 
>>> companies that made the most counters with nixie up there with HP and 
>>> Systron Donner.  One SYSTRON DONNER 7018 I have two of has the inverted 
>>> tubes in them that hang down instead of standing up.  I bought a second one 
>>> missing one tube.  Supposed to have 8 tube but someone must have needed one 
>>> and removed it.
>>> 
>>> On Friday, February 4, 2022 at 4:19:36 AM UTC-7 Bill Notfaded wrote:
>>> Love it Terry!  I love eldorado counters super cool stuff!  I'm a counter 
>>> freak to begin with so anything with nixie I can hook up to a 10MHz 
>>> reference is really awesome!
>>> 
>>> Bill
>>> On Monday, January 31, 2022 at 5:19:49 PM UTC-7 Bill van Dijk wrote:
>>> Thanks Terry, I have already found a very good scan on-line. Amazing 
>>> manual, it goes through a complete discussion on how the unit works and 
>>> includes a schematic with parts list. It includes instructions on 
>>> calibration also. Compare that with what you get today, if anything at all.
>>> 
>>>  
>>> 
>>> Bill v
>>> 
>>>  
>>> 
>>> From: neoni...@googlegroups.com <> [mailto:neoni...@googlegroups.com <>] On 
>>> Behalf Of Mac Doktor
>>> Sent: Monday, January 31, 2022 6:52 PM
>>> To: neonixie-l >
>>> Subject: Re: [neonixie-l] El Dorado Frequency Counter Restoration
>>> 
>>>  
>>> 
>>>  
>>> 
>>> On Jan 31, 2022, at 3:49 PM, Bill van Dijk > wrote:
>>> 
>>>  
>>> 
>>> I have an Eldorado model 1615 in my collection. It has 6 Nixies in the 
>>> display. It is cooled with a fan which sounds like a fully loaded 747 
>>> taking off! J
>>> 
>>> I have the manual for the 1615 if anyone needs it.
>>> 
>>>  
>>> 
>>>  
>>> 
>>> Terry Bowman, KA4HJH
>>> "The Mac Doctor"
>>> 
>>> https://www.astarcloseup.com 
>>> 
>>> "Every kid starts out as a natural-born scientist, and then we beat it out 
>>> of them. A few trickle through the system with their wonder and enthusiasm 
>>> for science intact."—Carl Sagan, Psychology Today, 1996
>>> 
>>>  
>>> 
>>> -- 
>>> 
>>> 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+...@googlegroups.com <>.
>>> 
>>> To view this discussion on the web, visit 
>>> https://groups.google.com/d/msgid/neonixie-l/9CC7CBD1-70A5-4B88-A68B-D5B7F4592701%40gmail.com
>>>  
>>> .
>>> 
>>> 
>>> -- 
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>>> email to neonixie-l+...@googlegroups.com <>.
>> 
>>> To view this discussion on the web, visit 
>>> 

Re: [neonixie-l] El Dorado Frequency Counter Restoration

[Richard Nicewonger]

Thanks for that link Bill. It definitely needs TLC - a lot of it! I’ve never 
seen that model before, but if you look closely you’ll see that it doesn’t use
LED’s but rather Panaplex displays (my favorite). Wish it wasn’t rack mount, 
cheaper and in better shape or I might have went for it just for those 
displays. Another interesting thing I noticed: rear label shows Eldorado as a 
subsidiary of E-H International. Never heard of ‘em but I guess they had
acquired Eldo at some point. My only Eldo is model 1607 counter/timer. This 
really helps toward my curiosity about that company and I am grateful.

Rich

> On Feb 5, 2022, at 2:34 PM, Bill Notfaded  wrote:
> 
> They made a few with LED.  Here's a time interval counter on eBay.  I'd love 
> one in good condition but this needs too much work!
> https://www.ebay.com/itm/VINTAGE-Eldorado-Model-797-EI797-R5-Rack-Mount-Tube-Time-Interval-Counter-PARTS-/153900473217?_ul=IN
> 
> Bill
> 
> On Saturday, February 5, 2022 at 11:20:04 AM UTC-7 nice...@optonline.net 
> wrote:
> Hi All,
> 
>   Does anyone know whatever happened to Eldorado Electronics? I wonder if 
> they ever made a counter or DVM that didn’t use Nixies.
> Don’t recall ever seeing any but maybe the group has some info.
> 
> Rich
> 
> 
>> On Feb 4, 2022, at 6:28 AM, Bill Notfaded > > wrote:
>> 
> 
>> 
>> Amazing it looks like it's working fine Martin.  Does anymore know how many 
>> counters they made?  I have a few but it's my guess they were one of the 
>> companies that made the most counters with nixie up there with HP and 
>> Systron Donner.  One SYSTRON DONNER 7018 I have two of has the inverted 
>> tubes in them that hang down instead of standing up.  I bought a second one 
>> missing one tube.  Supposed to have 8 tube but someone must have needed one 
>> and removed it.
>> 
>> On Friday, February 4, 2022 at 4:19:36 AM UTC-7 Bill Notfaded wrote:
>> Love it Terry!  I love eldorado counters super cool stuff!  I'm a counter 
>> freak to begin with so anything with nixie I can hook up to a 10MHz 
>> reference is really awesome!
>> 
>> Bill
>> On Monday, January 31, 2022 at 5:19:49 PM UTC-7 Bill van Dijk wrote:
>> Thanks Terry, I have already found a very good scan on-line. Amazing manual, 
>> it goes through a complete discussion on how the unit works and includes a 
>> schematic with parts list. It includes instructions on calibration also. 
>> Compare that with what you get today, if anything at all.
>> 
>>  
>> 
>> Bill v
>> 
>>  
>> 
>> From: neoni...@googlegroups.com <> [mailto:neoni...@googlegroups.com <>] On 
>> Behalf Of Mac Doktor
>> Sent: Monday, January 31, 2022 6:52 PM
>> To: neonixie-l >
>> Subject: Re: [neonixie-l] El Dorado Frequency Counter Restoration
>> 
>>  
>> 
>>  
>> 
>> On Jan 31, 2022, at 3:49 PM, Bill van Dijk > wrote:
>> 
>>  
>> 
>> I have an Eldorado model 1615 in my collection. It has 6 Nixies in the 
>> display. It is cooled with a fan which sounds like a fully loaded 747 taking 
>> off! J
>> 
>> I have the manual for the 1615 if anyone needs it.
>> 
>>  
>> 
>>  
>> 
>> Terry Bowman, KA4HJH
>> "The Mac Doctor"
>> 
>> https://www.astarcloseup.com 
>> 
>> "Every kid starts out as a natural-born scientist, and then we beat it out 
>> of them. A few trickle through the system with their wonder and enthusiasm 
>> for science intact."—Carl Sagan, Psychology Today, 1996
>> 
>>  
>> 
>> -- 
>> 
>> 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+...@googlegroups.com <>.
>> 
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>> https://groups.google.com/d/msgid/neonixie-l/9CC7CBD1-70A5-4B88-A68B-D5B7F4592701%40gmail.com
>>  
>> .
>> 
>> 
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>>  
>> .
> 
> 
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Re: [neonixie-l] El Dorado Frequency Counter Restoration

[Richard Nicewonger]

Hi All,

Does anyone know whatever happened to Eldorado Electronics? I wonder if 
they ever made a counter or DVM that didn’t use Nixies.
Don’t recall ever seeing any but maybe the group has some info.

Rich

> On Feb 4, 2022, at 6:28 AM, Bill Notfaded  wrote:
> 
> 
> Amazing it looks like it's working fine Martin.  Does anymore know how many 
> counters they made?  I have a few but it's my guess they were one of the 
> companies that made the most counters with nixie up there with HP and Systron 
> Donner.  One SYSTRON DONNER 7018 I have two of has the inverted tubes in them 
> that hang down instead of standing up.  I bought a second one missing one 
> tube.  Supposed to have 8 tube but someone must have needed one and removed 
> it.
> 
> On Friday, February 4, 2022 at 4:19:36 AM UTC-7 Bill Notfaded wrote:
> Love it Terry!  I love eldorado counters super cool stuff!  I'm a counter 
> freak to begin with so anything with nixie I can hook up to a 10MHz reference 
> is really awesome!
> 
> Bill
> On Monday, January 31, 2022 at 5:19:49 PM UTC-7 Bill van Dijk wrote:
> Thanks Terry, I have already found a very good scan on-line. Amazing manual, 
> it goes through a complete discussion on how the unit works and includes a 
> schematic with parts list. It includes instructions on calibration also. 
> Compare that with what you get today, if anything at all.
> 
>  
> 
> Bill v
> 
>  
> 
> From: neoni...@googlegroups.com <> [mailto:neoni...@googlegroups.com <>] On 
> Behalf Of Mac Doktor
> Sent: Monday, January 31, 2022 6:52 PM
> To: neonixie-l >
> Subject: Re: [neonixie-l] El Dorado Frequency Counter Restoration
> 
>  
> 
>  
> 
> On Jan 31, 2022, at 3:49 PM, Bill van Dijk > wrote:
> 
>  
> 
> I have an Eldorado model 1615 in my collection. It has 6 Nixies in the 
> display. It is cooled with a fan which sounds like a fully loaded 747 taking 
> off! J
> 
> I have the manual for the 1615 if anyone needs it.
> 
>  
> 
>  
> 
> Terry Bowman, KA4HJH
> "The Mac Doctor"
> 
> https://www.astarcloseup.com 
> 
> "Every kid starts out as a natural-born scientist, and then we beat it out of 
> them. A few trickle through the system with their wonder and enthusiasm for 
> science intact."—Carl Sagan, Psychology Today, 1996
> 
>  
> 
> -- 
> 
> You received this message because you are subscribed to the Google Groups 
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>  
> .
> 
> 
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Re: [neonixie-l] El Dorado Frequency Counter Restoration

[Richard Nicewonger]

Hi Everybody,

El Dorado made some pretty nice counters back in the day, a few of 
which I have owned at one time or another.
This example seems to be in better condition than most you see now. I don’t 
know if there ever was an El Dorado counter
that didn’t use Nixies. Perhaps some members could recall more info.

Rich

> On Jan 30, 2022, at 6:50 PM, martin martin  wrote:
> 
> Hello All!
> We helping a friend clean is 35 year old garage (you've heard this story 
> before) and I found a 1974 vintage El Dorado 15 MHz Nixie frequency counter.  
> Pics are inside, outside  and yes... the original service manual!.
> 
> Should be a cool project ...
> 
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>  
> .
> 

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Re: [neonixie-l] Now it's time for some "real" neon!

[Richard Nicewonger]

Greetings everyone,

I thought the group might appreciate my latest toy. It uses genuine 
Beckman displays SP-351 & SP-353 to show 4-1/2 digits.

Data Precision was located in Wakefield, Mass. until sometime in the 80”s. Does 
anyone know any details about the company or

its demise? I haven’t found a whole lot of info online. I also have its little 
brother, the rechargeable 245, which uses the .3” high 

Beckman displays and even sports a lanyard for carrying! Will show that one 
soon. They also made a frequency counter with a

family resemblance to the rest of their line. That one uses LED readouts and 
the one I have is in parts-only condition unfortunately.



> On Dec 6, 2021, at 9:00 AM, martin martin  wrote:
> 
> I was helping a friend clean out his garage and this popped in to view.  How 
> could I leave it there to break or be lost?
> 
> If one looks close at the clear glass it really looks great.
> 
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Re: [neonixie-l] Sperry Planar Display

[Richard Nicewonger]

Hello all,

Does anyone know the significance of those Sperry displays having the 
part# etched as “EX-332” rather than the more familiar “SP-332” ?

I was wondering if the “EX” might mean “experimental” but I’ve not seen 
anything like that on Panaplex displays before. Any ideas?


Rich


> On Oct 27, 2021, at 11:18 PM, martin martin  wrote:
> 
> I found 7 of these while cleaning a friends garage.  I can't make out the 
> part number but they are Sperry neon planar  seven segment displays.  About 
> 1/2" tall.
> 
> I use the larger Beckman in my 1980s Heathkit clock ...
> 
> Any ideas?
> 
> 
> thanks martin
> 
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Re: [neonixie-l] Looking for a PANAPLEX display driver module

[Richard Nicewonger]

Hi Terry,

I have never seen it done with this type of “hard forming” dipped 
encapsulation.

There might be the chance of dissolving the innards along with the epoxy!

I’ve seen epoxy that fills a mold to cover parts and I think that is dissolvable

but I can’t be sure. In any case, this is going to require more investigation 
so I

can choose the best course of action. Thank you for the suggestion.

All the best,

Rich



> On Sep 26, 2021, at 7:26 PM, Mac Doktor  wrote:
> 
> 
>> On Sep 26, 2021, at 4:07 PM, Dekatron42 > > wrote:
>> 
>> I think it should not be to hard to reverse engineer the design and make 
>> your own similar modules if necessary.
> 
> Is there a convenient way to remove the encapsulating material? I've seen 
> this done with other equipment. Typically potted in some sort of epoxy.
> 
> 
> Terry Bowman, KA4HJH
> "The Mac Doctor"
> 
> https://www.astarcloseup.com 
> 
> “...the book said something astonishing, a very big thought. The stars, it 
> said, were suns but very far away. The Sun was a star but close up.”—Carl 
> Sagan, "The Backbone Of Night", Cosmos, 1980
> 
> 
> 
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Re: [neonixie-l] Looking for a PANAPLEX display driver module

[Richard Nicewonger]

David,

Yes, that is exactly what I have thought about and it is what it is. 
Sometimes I get lucky with things like this and sometimes not.

I also have a Sony Sobax calc that is, for the most part, a doorstop. There 
isn’t a single IC that I can identify - and there must be

near 100 of ‘em. All it does is read “0” on all Nixies. I have a better shot at 
fixing the Victor! I thank you for the advice.


Rich






> On Sep 26, 2021, at 6:51 PM, David Forbes  wrote:
> 
> Richard,
> I have never, not once in my long life, seen a data sheet for, much less 
> spare units of, modules of this sort as used in calculators. They were 
> designed for a very specific purpose for OEM customers and not published. 
> 
> You could get really lucky and find them, but don't expect to. 
> 
> Your best bet is to figure out the input and output signal pins, voltages and 
> currents, then make an equivalent circuit with modern parts that does the 
> same job. 
> 
> I have a Sony calculator that's packed full of these things. It works now. I 
> don't think I'd be able to repair it if it fails.
> 
> 
> 
> On Sun, Sep 26, 2021, 12:16 PM Richard Nicewonger  <mailto:nice1...@optonline.net>> wrote:
> Hello all,
> 
>   Does anyone have any knowledge of these packaged electronic circuits 
> (PEC’s) that are used in VICTOR calculators with PANAPLEX displays? ...
> 
> Does anyone know of a source or have any that they would be willing to sell?
> 
> 
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Re: [neonixie-l] Looking for a PANAPLEX display driver module

[Richard Nicewonger]

Hi Martin,

I’m sure Burroughs used (and maybe designed) these modules since the 
Panaplex was their creation.

I have a schematic for a similar Victor calc model 18-1721 and mine is 18-1441. 
They are mostly identical

except the 1721 has scientific functions and somewhat different logic but the 
display circuitry seems to

follow what I have in mine. The thought of a module swap had occurred to me and 
I will probably do it if

I can’t get a replacement. The thing is, it would only verify if the part is 
indeed bad - not how to get a

replacement if it is. Group member Ira also suggested using discrete parts. 
There is a hint of what is

inside the segment driver portion of the module shown on the schematic but not 
all 9 parts are ID'd.

I’m going to wait a little while for a possible replacement and, failing that, 
I will probably try the part swap

to at least verify my suspicions. Thanks to you and Ira for all the good 
suggestions.

All the best,

Rich




> On Sep 26, 2021, at 4:07 PM, Dekatron42  wrote:
> 
> Burroughs used similar modules (as did probably other companies too) in some 
> of their designs. I think it should not be to hard to reverse engineer the 
> design and make your own similar modules if necessary.
> 
> Have you tried to swap two modules to see if the fault follows the module?
> 
> Do you have the schematic for the caluclator?
> 
>  /Martin
> 
> On Sunday, 26 September 2021 at 21:16:56 UTC+2 nice...@optonline.net wrote:
> Hello all,
> 
>   Does anyone have any knowledge of these packaged electronic circuits 
> (PEC’s) that
> 
> are used in VICTOR calculators with PANAPLEX displays? The VICTOR part number 
> is
> 
> shown in big numbers and the smaller number's significance is unknown. I have 
> a unit
> 
> that is missing the top-left segment (f segment) in all digit positions. 
> Tracing backwards
> 
> and comparing to working circuits, I believe the problem is originating at 
> one of these PEC’s.
> 
> There are 8 of these used to drive each segment plus the DP. Each also has 2 
> digit
> 
> drivers for the 16 digit display. This means each module serves three 
> functions!
> 
> Does anyone know of a source or have any that they would be willing to sell?
> 
> I only need one but would consider multiples. I also would consider a 
> boneyard calc that
> 
> uses these. Thanks in advance for any help that you can offer.
> 
> 
> Rich
>  
> 
> 
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[neonixie-l] Looking for a PANAPLEX display driver module

[Richard Nicewonger]

Hello all,

Does anyone have any knowledge of these packaged electronic circuits 
(PEC’s) that

are used in VICTOR calculators with PANAPLEX displays? The VICTOR part number is

shown in big numbers and the smaller number's significance is unknown. I have a 
unit

that is missing the top-left segment (f segment) in all digit positions. 
Tracing backwards

and comparing to working circuits, I believe the problem is originating at one 
of these PEC’s.

There are 8 of these used to drive each segment plus the DP. Each also has 2 
digit

drivers for the 16 digit display. This means each module serves three functions!

Does anyone know of a source or have any that they would be willing to sell?

I only need one but would consider multiples. I also would consider a boneyard 
calc that

uses these. Thanks in advance for any help that you can offer.


Rich
 

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Re: [neonixie-l] What is going on?

[Richard Nicewonger]

I absolutely agree and would like to extend that sentiment to Panaplex display 
calculators.

> On Sep 7, 2021, at 8:10 PM, Audrey  wrote:
> 
> Yeah. Especially nixie calculators. I absolutely hate to see those destroyed.
> 
> On Tue, Sep 7, 2021, 8:09 PM Trumpeter  > wrote:
> Hopefully they don't catch on to all the test equipment with nixies in 
> them...nothing will be spared.  
> 
> On Tuesday, September 7, 2021 at 9:51:52 AM UTC-7 nickja...@gmail.com 
>  wrote:
> Haha, that was a joke referring to overblown hype.  But construction 
> materials and labor are in short supply in the real world.
> 
> On Tue, Sep 7, 2021 at 11:46 AM Audrey > wrote:
> I dont think covid is increasing rhe prices of that one tube so 
> dramatically...
> 
> On Tue, Sep 7, 2021, 12:45 PM Nick Andrews > wrote:
> It's the new covid math.  Inflated perceptions and values for everything!  
> Seriously, we are estimating construction costs at +40% right now, especially 
> in VA hospitals.  It's insane.
> 
> On Tue, Sep 7, 2021 at 9:12 AM Nicholas Stock > wrote:
> 9 x NL900 tubes just sold for $609 on eBay. That is insane. They're literally 
> NL840's with a flat top. $609. 
> 
> 
> 
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Re: [neonixie-l] Newbie would like to introduce himself

[Richard Nicewonger]

Hi Bill,

I have a little story about that piece. When searching online a few 
weeks ago, I saw the ad from Andys Arcade that featured that part.
The ad claimed only one left so you know I quickly place the order. A few days 
later I get an email from Andy telling me that the item was
previously sold and inadvertently not removed from the site. Geez what a 
disappointment! Yes, that display seems to be really rare compared
to other displays that are sought after. I haven’t been able to even find a 
mention of an SP-737 anywhere online, except for Andy’s. Will keep on
looking but I want to thank you for your effort on my behalf. All the best!

Rich N.

> On Sep 1, 2021, at 1:43 PM, Bill Notfaded  wrote:
> 
> Wow Rich I have some panaplex and devices with them but the model you mention 
> is rarer it seems.  I wonder if they were used in some arcade games as I 
> found a picture here:  
> https://www.andysarcade.net/store2/images/source/comp/disp05.JPG
> You can see the common for digits on the right and one on the left.
> 
> Bill
> 
> On Friday, August 20, 2021 at 11:55:47 AM UTC-7 nice...@optonline.net wrote:
> Hi Bill,
> 
>   Thanks for the welcome! Yes, I agree with you about the “sickness” and 
> I’m probably not getting any better!
> It’s bad enough trying to find parts that are generally considered 
> unobtainium, but you bring up another point
> when trying to find a manual (either owner or service) that may be harder to 
> locate than the parts themselves.
> One example of that is my search for Sperry Panaplex display SP-737. This 
> 3-digit bugger has one anode for
> the left digit and another common to the other two digits. This is used in a 
> Marlin calculator for the two least-significant
> digits as well as polarity and error indicator. Sooner or later it will 
> probably appear for sale at a price equal to an
> ounce of gold! Such a deal! All the best.
> 
> Rich N.
> 
>   
> 
>> On Aug 20, 2021, at 12:20 PM, Bill Notfaded > > wrote:
>> 
> 
>> Welcome Rich... I too collect nixie tube test equipment including 
>> calculators, frequency counters, scalers with dekatrons, and nixie 
>> voltmeters.  I even have some X,Y machining displays.  I've been wanting to 
>> take some time to document some them.  Once I get a piece of classic display 
>> technology gear then I'm always looking for the original manuals to go with 
>> them as well!  It's kinda a sickness.
>> 
>> Bill
>> On Thursday, August 5, 2021 at 7:15:26 PM UTC-7 Pramanicin wrote:
>> Welcome to the madhouse! Only kiddinglots of very knowledgeable and more 
>> importantly, friendly and helpful folks on this list. No such thing as a 
>> stupid question here (unless you ask the same one twice. ha ha).
>> 
>> Cheers,
>> 
>> Nick
>> 
>> On Thu, Aug 5, 2021 at 3:34 PM gregebert > wrote:
>> "Abandon all hope ye who enter here"...it's too late to turn back; nixie 
>> tubes are not only addictive, but they are known to cause other addictions.
>> 
>> On Thursday, August 5, 2021 at 6:57:47 AM UTC-7 Keith Moore wrote:
>> Welcome! This place is my fave read of the day each day! :-) 
>> 
>> On Wednesday, August 4, 2021 at 5:21:59 PM UTC-4 Terry Bowman wrote:
>>> On Aug 4, 2021, at 2:39 PM, Richard Nicewonger > 
>>> wrote:
>>> 
>>> My particular interest is not necessarily clocks (although I do have a 
>>> nixie version) but more toward calculators and test equipment using these 
>>> type of displays. I am always a sucker for more of these that may require 
>>> some work to be operational. Sometimes I shoot myself in the foot because 
>>> of the difficulty in finding replacement parts for 50+ year old equipment, 
>>> especially displays!
>> 
>> You're in good company. The cost of replacement tubes is rising at an 
>> increasingly non-linear rate. Service manuals range from free pdfs to 
>> over-priced eBay listings to non-existent.
>> 
>> As for other parts, there are those lighted push-buttons on my 
>> Systron-Donner Time Code Generator/Reader. My apologies for complaining 
>> about this at least three times before but the d*mn thing is working 
>> perfectly and all it needs is a fix for those broken caps!
>> 
>> 
>>> I hope to get some insight from knowledgeable folks here. So, looking 
>>> forward to having some interesting and useful conversations.
>> 
>> You came to the right place. I shot myself in the foot by not joining up a 
>> year earlier.
>> 
>> 
>> Terry Bowman, KA4HJH
>> "The Mac Doctor"
>> 
>> https://www.astar

Re: [neonixie-l] Newbie would like to introduce himself

[Richard Nicewonger]

Hi Bill,

Thanks for the welcome! Yes, I agree with you about the “sickness” and 
I’m probably not getting any better!
It’s bad enough trying to find parts that are generally considered unobtainium, 
but you bring up another point
when trying to find a manual (either owner or service) that may be harder to 
locate than the parts themselves.
One example of that is my search for Sperry Panaplex display SP-737. This 
3-digit bugger has one anode for
the left digit and another common to the other two digits. This is used in a 
Marlin calculator for the two least-significant
digits as well as polarity and error indicator. Sooner or later it will 
probably appear for sale at a price equal to an
ounce of gold! Such a deal! All the best.

Rich N.

  
> On Aug 20, 2021, at 12:20 PM, Bill Notfaded  wrote:
> 
> Welcome Rich... I too collect nixie tube test equipment including 
> calculators, frequency counters, scalers with dekatrons, and nixie 
> voltmeters.  I even have some X,Y machining displays.  I've been wanting to 
> take some time to document some them.  Once I get a piece of classic display 
> technology gear then I'm always looking for the original manuals to go with 
> them as well!  It's kinda a sickness.
> 
> Bill
> On Thursday, August 5, 2021 at 7:15:26 PM UTC-7 Pramanicin wrote:
> Welcome to the madhouse! Only kiddinglots of very knowledgeable and more 
> importantly, friendly and helpful folks on this list. No such thing as a 
> stupid question here (unless you ask the same one twice. ha ha).
> 
> Cheers,
> 
> Nick
> 
> On Thu, Aug 5, 2021 at 3:34 PM gregebert  > wrote:
> "Abandon all hope ye who enter here"...it's too late to turn back; nixie 
> tubes are not only addictive, but they are known to cause other addictions.
> 
> On Thursday, August 5, 2021 at 6:57:47 AM UTC-7 Keith Moore wrote:
> Welcome! This place is my fave read of the day each day! :-) 
> 
> On Wednesday, August 4, 2021 at 5:21:59 PM UTC-4 Terry Bowman wrote:
>> On Aug 4, 2021, at 2:39 PM, Richard Nicewonger > 
>> wrote:
>> 
>> My particular interest is not necessarily clocks (although I do have a nixie 
>> version) but more toward calculators and test equipment using these type of 
>> displays. I am always a sucker for more of these that may require some work 
>> to be operational. Sometimes I shoot myself in the foot because of the 
>> difficulty in finding replacement parts for 50+ year old equipment, 
>> especially displays!
> 
> You're in good company. The cost of replacement tubes is rising at an 
> increasingly non-linear rate. Service manuals range from free pdfs to 
> over-priced eBay listings to non-existent.
> 
> As for other parts, there are those lighted push-buttons on my Systron-Donner 
> Time Code Generator/Reader. My apologies for complaining about this at least 
> three times before but the d*mn thing is working perfectly and all it needs 
> is a fix for those broken caps!
> 
> 
>> I hope to get some insight from knowledgeable folks here. So, looking 
>> forward to having some interesting and useful conversations.
> 
> You came to the right place. I shot myself in the foot by not joining up a 
> year earlier.
> 
> 
> Terry Bowman, KA4HJH
> "The Mac Doctor"
> 
> https://www.astarcloseup.com <https://www.astarcloseup.com/>
> 
> “...the book said something astonishing, a very big thought. The stars, it 
> said, were suns but very far away. The Sun was a star but close up.”—Carl 
> Sagan, "The Backbone Of Night", Cosmos, 1980
> 
> 
> 
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[neonixie-l] Newbie would like to introduce himself

[Richard Nicewonger]

  Hello everybody! I'd like to introduce myself to all. My name is Rich 
Nicewonger and I am a retired electronics technician. I worked in the field 
of power and energy measurement instrumentation for 40 years at a leading 
NJ company. Gas discharge displays have always interested me. In fact, the 
company I worked for used Beckman displays in some of their products! My 
particular interest is not necessarily clocks (although I do have a nixie 
version) but more toward calculators and test equipment using these type of 
displays. I am always a sucker for more of these that may require some work 
to be operational. Sometimes I shoot myself in the foot because of the 
difficulty in finding replacement parts for 50+ year old equipment, 
especially displays! I hope to get some insight from knowledgeable folks 
here. So, looking forward to having some interesting and useful 
conversations.
My best to all,

Rich

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