What kind of display is this?

102 views
Skip to first unread message

jb-electronics

unread,
May 12, 2022, 11:27:35 AMMay 12
to neoni...@googlegroups.com
I should probably know, but how does this generate the characters, and
where can I read them off?

https://www.ebay.com/itm/354047743434

Cheers
Jens

Nicholas Stock

unread,
May 12, 2022, 11:31:51 AMMay 12
to 'Greg P' via neonixie-l
It's a 'monoscope'....reads off letters on the end plate...


--
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/4398b82d-f18f-644d-4485-b490328535ac%40jb-electronics.de.

Adrian Godwin

unread,
May 12, 2022, 11:42:07 AMMay 12
to neoni...@googlegroups.com
So it's a thermionic character-generator ROM ?

Toby Thain

unread,
May 12, 2022, 12:07:02 PMMay 12
to neoni...@googlegroups.com
On 2022-05-12 11:41 a.m., Adrian Godwin wrote:
> So it's a thermionic character-generator ROM ?
>

TubeTimeUS, who for all I know is on this list, has blogged in detail
about these:

http://tubetime.us/index.php/2018/06/04/a-vacuum-tube-rom/

https://twitter.com/TubeTimeUS/status/1002324117226287104

I own a handful of these tubes so I'm keen to recapitulate their work.

--Toby



> On Thu, May 12, 2022 at 4:31 PM Nicholas Stock <nick...@gmail.com
> <mailto:nick...@gmail.com>> wrote:
>
> It's a 'monoscope'....reads off letters on the end plate...
>
> http://ed-thelen.org/comp-hist/CK1414.pdf
> <http://ed-thelen.org/comp-hist/CK1414.pdf>
>
> On Thu, May 12, 2022 at 8:27 AM jb-electronics
> <webm...@jb-electronics.de <mailto:webm...@jb-electronics.de>>
> wrote:
>
> I should probably know, but how does this generate the
> characters, and
> where can I read them off?
>
> https://www.ebay.com/itm/354047743434
> <https://www.ebay.com/itm/354047743434>
>
> Cheers
> Jens
>
> --
> 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
> <mailto:neonixie-l%2Bunsu...@googlegroups.com>.
> <https://groups.google.com/d/msgid/neonixie-l/4398b82d-f18f-644d-4485-b490328535ac%40jb-electronics.de>.
>
> --
> 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
> <mailto:neonixie-l+...@googlegroups.com>.
> To view this discussion on the web, visit
> https://groups.google.com/d/msgid/neonixie-l/CAOX%2BRHLTaqHsX28ZSXAkuRiP6zdUmE84K-AAJXTc2VAtW%3D%2BBPg%40mail.gmail.com
> <https://groups.google.com/d/msgid/neonixie-l/CAOX%2BRHLTaqHsX28ZSXAkuRiP6zdUmE84K-AAJXTc2VAtW%3D%2BBPg%40mail.gmail.com?utm_medium=email&utm_source=footer>.
>
> --
> 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
> <mailto:neonixie-l+...@googlegroups.com>.
> To view this discussion on the web, visit
> https://groups.google.com/d/msgid/neonixie-l/CALiMYrugcb_0Ut0A9EeTuAB1BO1OP6-vfHwCFczDpG6P7iX97Q%40mail.gmail.com
> <https://groups.google.com/d/msgid/neonixie-l/CALiMYrugcb_0Ut0A9EeTuAB1BO1OP6-vfHwCFczDpG6P7iX97Q%40mail.gmail.com?utm_medium=email&utm_source=footer>.

Mac Doktor

unread,
May 12, 2022, 12:46:29 PMMay 12
to neonixie-l

On May 12, 2022, at 11:31 AM, Nicholas Stock <nick...@gmail.com> wrote:


Thank you for that link. I'd never heard the name Symbolray before.


On May 12, 2022, at 11:41 AM, Adrian Godwin <artg...@gmail.com> wrote:

So it's a thermionic character-generator ROM ?

Think of it as an analog character-generator ROM.


Terry Bowman, KA4HJH
"The Mac Doctor"

"If only you could see what I've seen with your eyes."—Roy Batty, Blade Runner

liam bartosiewicz

unread,
May 12, 2022, 1:33:51 PMMay 12
to neoni...@googlegroups.com
Am I correct in saying that you cannot directly view the characters off the monoscope? It would be cool to be able to display a bunch of characters on a small crt like a NIMO tube.

On May 12, 2022, at 9:46 AM, Mac Doktor <themac...@gmail.com> wrote:


--
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/4E748882-5722-42BE-AA6B-E7407DF795EA%40gmail.com.

Toby Thain

unread,
May 12, 2022, 1:42:32 PMMay 12
to neoni...@googlegroups.com
On 2022-05-12 1:33 p.m., liam bartosiewicz wrote:
> Am I correct in saying that you cannot directly view the characters off
> the monoscope? It would be cool to be able to display a bunch of
> characters on a small crt like a NIMO tube.

Correct, you cannot. You need to drive the Monoscope like a CRT, with a
raster, then read off the output and drive something else with similar
raster deflections.

Actual terminals (e.g. Conrac) were built with this chargen, there are
fleeting references online.

For more details see what I already posted:

jb-electronics

unread,
May 12, 2022, 5:43:52 PMMay 12
to neoni...@googlegroups.com, Toby Thain
This is so cool! Thanks for sharing, much appreciated!

Best wishes
Jens

Nick

unread,
May 30, 2022, 6:17:46 AMMay 30
to neonixie-l
I also believe that they were used for text on RADAR displays.

There were a lot of variants of the CK1414 - the suffix specifies the mask in the tube - it's the mask that determines what characters the tube can generate.

I have two types here - CK1414-07 (Brimar) & CK1414F10C (Raytheon) - they generate different characters.

Some larger users had custom masks made for specific applications (e.g. RADAR screen symbols).

Nick

Instrument Resources of America

unread,
May 30, 2022, 10:39:41 AMMay 30
to 'Nick' via neonixie-l

IIRC the FAA used a lot of these!!  Airport radars.   Ira.

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/1fce9fe0-260d-4f5e-acca-2ae34f4d042cn%40googlegroups.com.
Reply all
Reply to author
Forward
0 new messages