Got myself a Scope..  - Page 1
Forum section: electronics / general

author: JoannaK
author_rank: Frequent Contributor
timestamp: September 06, 2012, 08:50:14 pm
content: After a long while, I finally got a scope. Full of russian Tube-era technology, weights quite a lot.. Has just one channel and about 20Mhz Bandwidth...If I'd live close to Dave , I'd offer this one for teardown (and calibration), but I think I'm so not going to send this across the world...

author: tom66
author_rank: Super Contributor
timestamp: September 06, 2012, 09:24:48 pm
content: Good square wave if that's 22 MHz in...

author: JoannaK
author_rank: Frequent Contributor
timestamp: September 06, 2012, 09:33:20 pm
content: Nah.. That's picture shows machines own 1khz kalibration output I used to test the scope..I just assumed that who-ever has sticked that paper above the CRT knows what's he has written.. it's in Finnish, but roughly translate it says: "Note: Bandwidth is 22Mhz " ..Years back this scope has apparantly belong to military, it still has some official stickers.

author: IvoS
author_rank: Frequent Contributor
timestamp: September 06, 2012, 09:47:17 pm
content: How old is this Russian machine?

author: ftransform
author_rank: Frequent Contributor
timestamp: September 06, 2012, 10:04:13 pm
content: you need to stencil a hammer and sickle on it.I love how it says CCCP.Or perhaps cross out the CCCP and write USA USA USA #1

author: Smokey
author_rank: Super Contributor
timestamp: September 06, 2012, 10:08:40 pm
content: I love it. I want one! Even if it didn't work, I'd still keep it in my lab as decoration.

author: firewalker
author_rank: Super Contributor
timestamp: September 07, 2012, 07:45:21 am
content: Any photos from the inside?Alexander.

author: Achilles
author_rank: Regular Contributor
timestamp: September 07, 2012, 09:37:56 am
content: Nice one! That should serve you for ages. Most of the Eastern stuff was kept quite simple but very robust.Looks like straight out of the MIR.Please, just open it up and show some photos from the inside. I am pretty curious about the built quality and used components.

author: GK
author_rank: Super Contributor
timestamp: September 07, 2012, 10:10:02 am
content: Nice old scope. I have a bit of an analogue oscilloscope fetish.Here is one of mine. As far as I can tell it is a custom job for a military naval vessel. Electrically it is very simple and is very well built. The power supply is a seperate unit, which I can't seem to find right now; otherwise I would have fired it up for the photos. I don't fancy my chances of ever finding a service manual for this one and so far could not have been bothered to trace the circuits out.

author: GK
author_rank: Super Contributor
timestamp: September 07, 2012, 10:20:39 am
content: Another one!This is a Philips from the forties; a model which is noteworthy for the linearity of its 884 thyratron horizontal sweep generator and a complete lack of scale/calibration indications on any of the controls, that might otherwise unduly confuse the operator. You just twiddle the knobs until the display looks right!

author: AndyC_772
author_rank: Super Contributor
timestamp: September 07, 2012, 11:38:08 am
content: Quote from: GK on September 07, 2012, 10:20:39 amPlease, tell me that's not a pure sine wave it's trying to display!No obvious trigger controls either; presumably it just has to be adjusted until the horizontal sweep rate exactly matches that of the signal you're trying to view, right?

author: vk6zgo
author_rank: Super Contributor
timestamp: September 07, 2012, 11:50:09 am
content: Quote from: GK on September 07, 2012, 10:20:39 amI had one exactly the same!I'm not sure what happened to it,but I may have given it away to a collector.AWA made one which looked very similar.They were OK for troubleshooting audio amps,but not much else!The old Russki is still a quite usable instrument for a lot of work,quite apart from the historical value.

author: free_electron
author_rank: Super Contributor
timestamp: September 07, 2012, 03:16:18 pm
content: It says Made in 'A Prisoner island hidden in the summer of a million years'. Even on some of the capacitors. wonder if that brand is still around....

author: T4P
author_rank: Super Contributor
timestamp: September 07, 2012, 03:39:34 pm
content: Quote from: vk6zgo on September 07, 2012, 11:50:09 amResembles a audiophile tube amp doesn't it?

author: free_electron
author_rank: Super Contributor
timestamp: September 07, 2012, 03:59:00 pm
content: Quote from: T4P on September 07, 2012, 03:39:34 pmnonono . it's a scopophile's scope !

author: Hypernova
author_rank: Unknown
timestamp: September 07, 2012, 04:11:39 pm
content: In Soviet Russia, the scope probes you!Not something you get to see everyday. Come to think of it I can't think of any Russian instrument companies around these days.

author: bullet308
author_rank: Frequent Contributor
timestamp: September 07, 2012, 04:29:41 pm
content: I'll bet its as a masterpiece of electronic brutalisim on the inside. Very old-skool, overbuilt and quirky, and made to last a thousand years.

author: T4P
author_rank: Super Contributor
timestamp: September 07, 2012, 04:54:02 pm
content: Quote from: bullet308 on September 07, 2012, 04:29:41 pmBecause it's made to probe you

author: ataradov
author_rank: Super Contributor
timestamp: September 07, 2012, 06:13:44 pm
content: Quote from: Hypernova on September 07, 2012, 04:11:39 pmThere are some, but they do what the rest of the world does - rebrand OEM stuff and sell it.

author: JoannaK
author_rank: Frequent Contributor
timestamp: September 08, 2012, 01:21:47 am
content: Quote from: firewalker on September 07, 2012, 07:45:21 amNo yet.. I might put it onto my long list of things to do .. Like fixing my Dell 2001 20" LCD monitor (most lilkely just power supply/caps or cfl backlight gone), making some long delayed videos and blogposts (like my Sony STR-445 relay-resoldering), fixing n+1 items with Sugru and whatnot.I noticed one clever thing on this Scope, the most important calibration settings (like voltage and sweep speed) are available at the front panel. I didn't even need to open this thingy for those. Darn clever those ruskies..

author: GK
author_rank: Super Contributor
timestamp: September 08, 2012, 03:32:34 am
content: Quote from: AndyC_772 on September 07, 2012, 11:38:08 amI'm afraid so!Quote from: AndyC_772 on September 07, 2012, 11:38:08 amNot quite. You do have to adjust the timebase coarse and fine frequency controls so that the timebase repetition rate is very close to a multiple of the input waveform frequency, but the final "phase lock" is achieved by tweaking the synchronisation knob. The vertical amplifier signal is fed to the grid of the thyratron tube via this potentiometer, and modulates the threshold voltage at which the thyratron fires. Buy tweaking back and forth the "fine" frequency control knob and the "synchronisation" knob, it's quite easy to lock the timebase onto the vertical amp's input signal.

author: GK
author_rank: Super Contributor
timestamp: September 08, 2012, 04:00:07 am
content: Quote from: vk6zgo on September 07, 2012, 11:50:09 amI hope you gave it to someone who knows how to replace electrolytic capacitors!When I got mine all of the original chassis mount electros had spewed out their brown wax innards and the rectifier tubes were glowing red!

author: ProBang
author_rank: Contributor
timestamp: September 08, 2012, 09:48:39 am
content: Quote from: free_electron on September 07, 2012, 03:16:18 pmGuantanamo...?

author: Bored@Work
author_rank: Super Contributor
timestamp: September 08, 2012, 10:59:27 am
content: Quote from: ProBang on September 08, 2012, 09:48:39 amOr The Village, where they held The Prisoner (aka Number 6)?(For those too young to rememberhttp://en.wikipedia.org/wiki/The_PrisonerIf you have never watched it, do not watch the last episode. It ruins the otherwise great series, and is an example of the negative effects of uncontrolled use of controlled substances.)

author: baljemmett
author_rank: Unknown
timestamp: September 08, 2012, 10:42:36 pm
content: Quote from: Bored@Work on September 08, 2012, 10:59:27 amHmm, that's the only one I haven't seen -- missed it when I was watching reruns here a few years ago. I guess that means I should not be in too much of a rush to get to the end of the box set I picked up for a bargain price just before the remake was announced, then?

author: PA4TIM
author_rank: Super Contributor
timestamp: September 08, 2012, 11:35:46 pm
content: Area 53, thats where the capture alien scopes and tell us there Russian.Got an old Hameg miniscope. That also has no trigger, only sync, like the Philips. You can not measure frequency with it. The timebase is also a bit unusual. You have o fiddle with the variable timebase ( that is labeld from-to and the sync to get it stable ( more or less)Also have 3 >GHz scopes from the sixties. Two tek ( 547 and 1S1 and 1S2) and a Philips 3410 with the 1GHz sample plugin. The Philips has a superiour trigger compared with the Tek 1S1 ( the 1S2 is a different story, great for TDR but without an external sync source and delayline it is hard to get signals using it as a 5 GHz plugin. But for those days it must been wonders of thechnology.

author: Bored@Work
author_rank: Super Contributor
timestamp: September 09, 2012, 06:43:46 am
content: Quote from: baljemmett on September 08, 2012, 10:42:36 pmI wouldn't spend any money or effort to see the last episode. Not if you are looking for some explanation, conclusion, closure. I felt my intelligence was insulted and my time wasted. It is not even a cliffhanger. It is just someone's drug experience visualised. There is a reason Patrick McGoohan never again worked in Britain after delivering that.