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'scope clock advice please
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et...@whidbey.com
Jun 27, 2019, 7:27:37 PM6/27/19
to
Well, I've been gone for a month and this group is dead. So maybe
my questions will liven it up some. Or maybe everyone else is also on
vacation. I know, this is a repair group. But I will no doubt need to
repair whatever I build. And besides, I get better electronics advice
here, as in more of it and correct, than on the basics group.
While wasting some time on the computer while being on hold I came
across some small ocsilloscope CRTs, then looking for something to
light one of them up I saw some kits to make oscilloscope clocks. Only
34 bucks for the kit!
So I ordered a two inch CRT with electrostatic deflection. Here's a
link to the CRT I ordered:
https://www.ebay.com/itm/5LO38I-Mini-5-cm-CRT-oscilloscope-cathode-ray-tube-FOR-DIY-NOS-BOXED/111978397405?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20160908105057%26meid%3Da8915a4a567c484c94f5f3b2d9e743c4%26pid%3D100675%26rk%3D4%26rkt%3D15%26mehot%3Dag%26sd%3D401706260380%26itm%3D111978397405&_trksid=p2481888.c100675.m4236&_trkparms=pageci%3Afb320543-9930-11e9-9594-74dbd1808485%7Cparentrq%3A9b35da7016b0aa19f93d280effb7f16e%7Ciid%3A1
Then on to ordering the kit. Hah! No dice. The kits are no longer
available. But I think I can still download the code for the
microcontrollers and the files for the circuit boards. Here is a link
to the page that the kit used to be available from:
http://www.dutchtronix.com/ScopeClockH3-1-Enhanced.htm
The kit was also available from other sources but I can't find it
for sale anywhere. Darn. Maybe someone here bought one of these kits
and never built it and it is collecting dust. If so why not sell it to
me?
I also need to drive the CRT and I found a simple circuit called
the Mullard's Pupil Oscilloscope. Here's a link:
https://www.instructables.com/id/Mullard-Pupils-Oscilloscope/
So, if I build the Mullard scope circuit will it drive the two
inch CRT I ordered seeing as how it was made to drive a 1 inch CRT?
And if that works will the Dutchtronix clock circuit work with the
Mullard scope and give me a nice looking display?
Look, this is just for fun. I am capable of safely dealing with
the high voltage. But I don't know enough to know if all the parts
will play nice with each other. I have also not built any tube or
valve gear using point to point wiring so a little advice about that
would be greatly appreciated. When it is all done the idea is to have
as much of the tube circuitry as possible exposed with the modern
microntroller stuff hidden away. I like tube stuff and exposed
machinery, always have.
I think a one tube scope with a hand wound xmfr could look pretty
cool sitting on a shelf near my tube amplifier.
Thanks All,
Eric
my questions will liven it up some. Or maybe everyone else is also on
vacation. I know, this is a repair group. But I will no doubt need to
repair whatever I build. And besides, I get better electronics advice
here, as in more of it and correct, than on the basics group.
While wasting some time on the computer while being on hold I came
across some small ocsilloscope CRTs, then looking for something to
light one of them up I saw some kits to make oscilloscope clocks. Only
34 bucks for the kit!
So I ordered a two inch CRT with electrostatic deflection. Here's a
link to the CRT I ordered:
https://www.ebay.com/itm/5LO38I-Mini-5-cm-CRT-oscilloscope-cathode-ray-tube-FOR-DIY-NOS-BOXED/111978397405?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20160908105057%26meid%3Da8915a4a567c484c94f5f3b2d9e743c4%26pid%3D100675%26rk%3D4%26rkt%3D15%26mehot%3Dag%26sd%3D401706260380%26itm%3D111978397405&_trksid=p2481888.c100675.m4236&_trkparms=pageci%3Afb320543-9930-11e9-9594-74dbd1808485%7Cparentrq%3A9b35da7016b0aa19f93d280effb7f16e%7Ciid%3A1
Then on to ordering the kit. Hah! No dice. The kits are no longer
available. But I think I can still download the code for the
microcontrollers and the files for the circuit boards. Here is a link
to the page that the kit used to be available from:
http://www.dutchtronix.com/ScopeClockH3-1-Enhanced.htm
The kit was also available from other sources but I can't find it
for sale anywhere. Darn. Maybe someone here bought one of these kits
and never built it and it is collecting dust. If so why not sell it to
me?
I also need to drive the CRT and I found a simple circuit called
the Mullard's Pupil Oscilloscope. Here's a link:
https://www.instructables.com/id/Mullard-Pupils-Oscilloscope/
So, if I build the Mullard scope circuit will it drive the two
inch CRT I ordered seeing as how it was made to drive a 1 inch CRT?
And if that works will the Dutchtronix clock circuit work with the
Mullard scope and give me a nice looking display?
Look, this is just for fun. I am capable of safely dealing with
the high voltage. But I don't know enough to know if all the parts
will play nice with each other. I have also not built any tube or
valve gear using point to point wiring so a little advice about that
would be greatly appreciated. When it is all done the idea is to have
as much of the tube circuitry as possible exposed with the modern
microntroller stuff hidden away. I like tube stuff and exposed
machinery, always have.
I think a one tube scope with a hand wound xmfr could look pretty
cool sitting on a shelf near my tube amplifier.
Thanks All,
Eric
Dave Platt
Jun 27, 2019, 7:54:03 PM6/27/19
to
In article <bkiahetm7sd5tu5le...@4ax.com>,
In principle it ought to work, if you get the voltages correct. If
you don't, it'll either not work, or damage the CRT or something else.
Among the things you'll need to look at, in matching up the various
circuits and components, are;
- The required heater (filament) voltage and current for the CRT you
are using.
- The cathode, grid and deflection voltages for the CRT you are using.
- The voltages being created by the clock circuit (microprocessor)
and being fed to the X and Y inputs of the scope circuit
Read through the data sheet for the DH3-91 CRT that the circuit was
designed to work with (http://www.labguysworld.com/1CP1(db3-91).pdf)
and for the CRT you bought.
The physical size of the CRT doesn't matter very much (directly) but
a larger or different CRT may have different voltage or current
requirements.
<et...@whidbey.com> wrote:
> So, if I build the Mullard scope circuit will it drive the two
>inch CRT I ordered seeing as how it was made to drive a 1 inch CRT?
>And if that works will the Dutchtronix clock circuit work with the
>Mullard scope and give me a nice looking display?
Maybe. :-)
> So, if I build the Mullard scope circuit will it drive the two
>inch CRT I ordered seeing as how it was made to drive a 1 inch CRT?
>And if that works will the Dutchtronix clock circuit work with the
>Mullard scope and give me a nice looking display?
In principle it ought to work, if you get the voltages correct. If
you don't, it'll either not work, or damage the CRT or something else.
Among the things you'll need to look at, in matching up the various
circuits and components, are;
- The required heater (filament) voltage and current for the CRT you
are using.
- The cathode, grid and deflection voltages for the CRT you are using.
- The voltages being created by the clock circuit (microprocessor)
and being fed to the X and Y inputs of the scope circuit
Read through the data sheet for the DH3-91 CRT that the circuit was
designed to work with (http://www.labguysworld.com/1CP1(db3-91).pdf)
and for the CRT you bought.
The physical size of the CRT doesn't matter very much (directly) but
a larger or different CRT may have different voltage or current
requirements.
John Robertson
Jun 27, 2019, 7:58:07 PM6/27/19
to
probably buy one just for fun. I've got a few 'scopes sitting around
that aren't doing anything useful...
As for the Mullard scope, it should work with a larger tube, you just
may have to raise the deflection voltage a bit. Find the specs on the
two tubes to see what the deflection differences are - if any!
John :-#)#
--
(Please post followups or tech inquiries to the USENET newsgroup)
John's Jukes Ltd.
MOVED to #7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3
(604)872-5757 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."
Phil Allison
Jun 27, 2019, 10:05:37 PM6/27/19
to
et...@whidbey.com wrote:
>
>
> I also need to drive the CRT and I found a simple circuit called
> the Mullard's Pupil Oscilloscope. Here's a link:
>
> https://www.instructables.com/id/Mullard-Pupils-Oscilloscope/
>
>
** No pics or diagram showing up for me.
>
>
> I also need to drive the CRT and I found a simple circuit called
> the Mullard's Pupil Oscilloscope. Here's a link:
>
> https://www.instructables.com/id/Mullard-Pupils-Oscilloscope/
>
>
Am I missing something?
.... Phil
Rheilly Phoull
Jun 27, 2019, 10:59:35 PM6/27/19
to
Sjouke Burry
Jun 27, 2019, 11:50:03 PM6/27/19
to
Needs a few mods, if you dont want a 12v supply.
Phil Allison
Jun 28, 2019, 4:14:28 AM6/28/19
to
Sjouke Burry wrote:
>
> Phil Allison wrote:
> > et...@whidbey.com wrote:
> >>
> >>
> >> I also need to drive the CRT and I found a simple circuit called
> >> the Mullard's Pupil Oscilloscope. Here's a link:
> >>
> >> https://www.instructables.com/id/Mullard-Pupils-Oscilloscope/
> >>
> >>
> >
> >
> >
> > ** No pics or diagram showing up for me.
> >
> > Am I missing something?
> >
> >
>
> >
> Loads fine here(Netherlands).
>
> Phil Allison wrote:
> > et...@whidbey.com wrote:
> >>
> >>
> >> I also need to drive the CRT and I found a simple circuit called
> >> the Mullard's Pupil Oscilloscope. Here's a link:
> >>
> >> https://www.instructables.com/id/Mullard-Pupils-Oscilloscope/
> >>
> >>
> >
> >
> >
> > ** No pics or diagram showing up for me.
> >
> > Am I missing something?
> >
> >
>
> >
>
** Sites sometimes tell me I am using an "ad blocker" - which must be part of Windows 7 cos I never added one.
Could that be it ?
.... Phil
Jeff Layman
Jun 28, 2019, 4:55:32 AM6/28/19
to
don't know what browser you are using, but try using it with all add-ons
disabled ("Safe Mode" when using Firefox, for instance). If that allows
you to see the page, you have to go back to normal mode and switch each
off add-on in turn until you find the one which is stopping the page
from displaying.
--
Jeff
peterw...@gmail.com
Jun 28, 2019, 6:59:57 AM6/28/19
to
http://oscilloscopeclocknixiecrt.com/Kit.htm
https://makezine.com/2007/05/30/35-avr-oscilloscope-clock/
Peter Wieck
Melrose Park, PA
https://makezine.com/2007/05/30/35-avr-oscilloscope-clock/
Peter Wieck
Melrose Park, PA
John-Del
Jun 28, 2019, 7:36:43 AM6/28/19
to
Geo
Jun 28, 2019, 11:06:54 AM6/28/19
to
John Robertson
Jun 28, 2019, 1:31:45 PM6/28/19
to
Nice schematics with valves instead of tubes. Must be some furren idear.
John ;-#)#
~misfit~
Jun 29, 2019, 7:30:51 AM6/29/19
to
recommend it highly) in Firefox, works in Chrome too.
--
Shaun.
"Humans will have advanced a long, long way when religious belief has a cozy little classification
in the DSM"
David Melville
This is not an email and hasn't been checked for viruses by any half-arsed self-promoting software.
jf...@my-deja.com
Jun 29, 2019, 10:22:52 AM6/29/19
to
On Thursday, June 27, 2019 at 7:05:37 PM UTC-7, Phil Allison wrote:
>
> Am I missing something?
>
>
> .... Phil
Based on all the successful responses, the answer is obviously "YES!"
>
> Am I missing something?
>
>
> .... Phil
John Robertson
Jun 29, 2019, 11:26:27 AM6/29/19
to
>
Hi Phil,
I use this site when I'm not sure where the problem is:
https://isitdownorjust.me/
Hope that helps!
John :-#)#
et...@whidbey.com
Jun 29, 2019, 12:35:49 PM6/29/19
to
compare it to my CRT when it arrives.
Eric
---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus
et...@whidbey.com
Jun 29, 2019, 12:47:31 PM6/29/19
to
the kit minus a CRT. I may go this route. The bottom link is to the
kit that is no longer available. But I can download the files for the
PC boards and the code for the microcontrollers. I did mention this in
my post.
Eric
et...@whidbey.com
Jun 29, 2019, 12:51:18 PM6/29/19
to
On Fri, 28 Jun 2019 16:06:50 +0100, Geo <nhhu...@dea.spamcon.org>
wrote:
>https://www.ebay.com/itm/Oscilloscope-Clock-Kit-for-many-crt-types-Wifi-OR-gps-CRT-Cathode-ray-tube-Scope/303198819933?hash=item46980ed65d:g:84wAAOSw3dxbTimZ
Yeah, I saw that kit. $170.00 and he doesnt't even show a picture of
the clock display. It's too bad I didn't think about doing this a few
years ago when a board could be had for $34.00!
Eric
wrote:
>https://www.ebay.com/itm/Oscilloscope-Clock-Kit-for-many-crt-types-Wifi-OR-gps-CRT-Cathode-ray-tube-Scope/303198819933?hash=item46980ed65d:g:84wAAOSw3dxbTimZ
Yeah, I saw that kit. $170.00 and he doesnt't even show a picture of
the clock display. It's too bad I didn't think about doing this a few
years ago when a board could be had for $34.00!
Eric
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