EEVblog Electronics Community Forum
Products => Test Equipment => Topic started by: klimm on May 27, 2018, 04:21:31 pm
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Hi all,
I am in search of the above docs, as I do have the thing not working, of course, but no info about it.
It uses the RFT B13S13 CRT but also about this one can't get any info
Kind regards,
Gelu
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How about some photos from outside and also inside? We might be able to recognize it as a different brand which would make it easier to find documents.
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There is no such other brand, Pinkus
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Hi,
In this thread you can find pictures of schematics: https://www.elektroda.pl/rtvforum/topic2970035.html?sid=91a14c818ffc3c30c08f228432055734 (https://www.elektroda.pl/rtvforum/topic2970035.html?sid=91a14c818ffc3c30c08f228432055734)
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You never know. Maybe somebody recognizes it as a scope also being sold by brand xyz.
btw: did you ask the manufacturer?
At least in their brochure they are proudly referring to their invention from 1986
http://radiotechnika.com.pl/component/tinydoc/document/124?format=raw (http://radiotechnika.com.pl/component/tinydoc/document/124?format=raw)
page 5, bottom right corner. So chances are not too small that they do have some documentation somewhere.
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Fejkblad, Pinkus,
Thank you for your help.
It was maybe not polite from me not to mention that I really searched the internet before posting.
Who would believe me anyway.
Of course, before posting here, I did it on romanian forums, and on elektroda.pl. I find there 2 threads dealing with repair/restoration of this oscilloscope Gizmon and Milik. There was some info but didn't help much, as mine has different symptoms and the guys there had schematics at hand. So, I opened a thread on elektroda.pl asking for docs. No answer yet. I also wrote an mail to Radiotechnika asking for docs. I also find their flyer mentioning the KR-7401. Well after waiting for more than a week, I decided to also ask here, seeing some of you guys are from Poland. I now have a thread on Robotrontechnik forum that mostly deals with ex DDR stuff, in search of data for the CRT the RFT's B13S13 which is a storage CRT.
During the cold war, no western country would buy from eastern ones, technology, only dumping consumer goods.
So, again, no chance that we could discover the KR-7401 under other name in the western world :)
Well, opening the machine, I determined by eye the pins of the CRT and I supplied the filament with 6.3V. Measured a small current between cathode and control grid I=40uA after running for about 3 minutes. Not much life in it I would say, but I still have the option of trying to regenerate the cathode for about other 500 hours of working which for my needs as radio amateur is really ok. I need a scope not so often and it is the provocation of repairing it instead of making a postal box of it :)
Thanks again, Gelu, YO5TC
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Fejkblad, Pinkus,
Thank you for your help.
It was maybe not polite from me not to mention that I really searched the internet before posting.
Who would believe me anyway.
Well, not me, obviously...
As you should find this site:
http://www.instrukcje-schematy.pl/ (http://www.instrukcje-schematy.pl/)
containing countless documentation pieces regarding almost every T&M equipment produced here.
But they're not free to get, for sure...
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Thank you Jacon,
I was not aware of the site. I wrote an email and I quickly got the infos in polish, scanned at a relative low quality . Too bad the phots were not cleaned before transformed in PDF, an this makes the document hard to read.
The price was really ok and overall, I have more info than before.
Thank you again
Gelu, YO5TC