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 Post subject: B&W Monitor From a Challenge Paper Cutter
PostPosted: May Sat 01, 2021 4:14 pm 
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Location: Kansas City area
This is a video monitor with a small CRT from a commercial paper cutter. I was "gifted" this monitor and was told it doesn't work. Does anyone know anything about these? Can anyone think of a reason for me to keep this, or what to use it for?


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 Post subject: Re: B&W Monitor From a Challenge Paper Cutter
PostPosted: May Sat 01, 2021 4:36 pm 
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Location: Detroit, MI USA
There's a remote possibility that the CRT if still good could fit as a replacement into some of the small black and white portables. Other than that, I see no reason for owning this unit.

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 Post subject: Re: B&W Monitor From a Challenge Paper Cutter
PostPosted: May Sat 01, 2021 10:05 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 1090
Location: dayton oh usa
i see a big cap that looks bulged.
thats a bipolar lytic.
its the h-yoke return cap.
i never toss stuff like that.
i refurb and shelve.
soon one of my regulars needs one.
instead of them waiting for me to get to theirs i sell them my refurb and take their old one to rebuild later.


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 Post subject: Re: B&W Monitor From a Challenge Paper Cutter
PostPosted: May Tue 04, 2021 7:02 am 
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Joined: Apr Sun 08, 2007 6:47 am
Posts: 4738
Location: British Columbia
Monitor for a CCTV system? I see a cap that had the name "Teapo" on it, that's one one of those junky mystery brand caps from the PRC, and those probably have something to do with it not working.
Regards
Arran


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 Post subject: Re: B&W Monitor From a Challenge Paper Cutter
PostPosted: May Sun 09, 2021 5:08 am 
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Joined: Aug Sat 27, 2011 1:59 am
Posts: 192
Location: Kansas City area
Yeah... :roll: I think it's going to recycling.


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 Post subject: Re: B&W Monitor From a Challenge Paper Cutter
PostPosted: May Sun 09, 2021 7:05 am 
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Joined: Jan Thu 16, 2020 12:29 am
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Well, it is a small monochrome video monitor, open frame industrial type. There is a good use for it, especially in the field of vintage computing. You could offer it up on the Vintage computer Forum in the computer Hardware section:

https://www.vcfed.org


You can actually have a lot of fun with these open frame video monitors, including modifying them to be multi-standard and putting an enclosure around them. Check out what I did with a small open frame video monitor to display vintage TV formats:

http://worldphaco.com/uploads/Autodetec ... nitor..pdf

So what you can do with a baby video monitor like this is only limited by your imagination. They can also serve, with modification to make an X-Y monitor, or a makeshift low frequency spectrum oscilloscope.


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 Post subject: Re: B&W Monitor From a Challenge Paper Cutter
PostPosted: May Sun 09, 2021 7:36 am 
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Joined: Apr Sun 08, 2007 6:47 am
Posts: 4738
Location: British Columbia
Blast wrote:
Yeah... :roll: I think it's going to recycling.


Why? Capacitors are easily replaced.
Regards
Arran


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 Post subject: Re: B&W Monitor From a Challenge Paper Cutter
PostPosted: May Mon 10, 2021 8:17 am 
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Joined: Jan Thu 16, 2020 12:29 am
Posts: 1382
... I could have also mentioned, one other use, as they often run from a 12V supply, is for a reversing camera application in a motor home.

Also, sometimes open frame small video monitors can ask a good price, especially new:

https://www.ebay.com/itm/302918168635?h ... SweopbwABo

So what you have is not worthless.


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 Post subject: Re: B&W Monitor From a Challenge Paper Cutter
PostPosted: May Mon 10, 2021 11:06 pm 
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Joined: Aug Sat 27, 2011 1:59 am
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Location: Kansas City area
ACORNVALVE wrote:
Well, it is a small monochrome video monitor, open frame industrial type. There is a good use for it, especially in the field of vintage computing. You could offer it up on the Vintage computer Forum in the computer Hardware section:

https://www.vcfed.org


You can actually have a lot of fun with these open frame video monitors, including modifying them to be multi-standard and putting an enclosure around them. Check out what I did with a small open frame video monitor to display vintage TV formats:

http://worldphaco.com/uploads/Autodetec ... nitor..pdf

So what you can do with a baby video monitor like this is only limited by your imagination. They can also serve, with modification to make an X-Y monitor, or a makeshift low frequency spectrum oscilloscope.


Thanks for your input, guys. It's really appreciated. I've replaced MANY a capacitor but I generally don't like to dig into a circuit until I have a schematic. And, I don't find one on Challenge's website (they are quick to say that this cutter is too old for support and parts availability). Of course, not being very motivated to work on this (due to lack of need to HAVE a video monitor for anything) is not helping much, either.

That write-up is very interesting, Acorn and a very cool project! I'm going to put the hold on recycling until I have a chance to review that document in depth.


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