UK Vintage Radio Repair and Restoration Powered By Google Custom Search Vintage Radio Service Data

Go Back   UK Vintage Radio Repair and Restoration Discussion Forum > Specific Vintage Equipment > Vintage Test Gear and Workshop Equipment

Notices

Vintage Test Gear and Workshop Equipment For discussions about vintage test gear and workshop equipment such as coil winders.

Reply
 
Thread Tools
Old 10th Feb 2018, 1:54 pm   #1
Brettski
Tetrode
 
Brettski's Avatar
 
Join Date: Dec 2017
Location: York, North Yorkshire, UK.
Posts: 55
Default Oscilloscope not used in years

Hi all, I am sat at work at the moment and it has occurred to me that I have a scope in the garage which I picked up from a boot sale around 15 years ago. The only reason I bought it was because it was a £1. I had no need for one at the time and no idea how to use it correctly. I did plug a Walkman into it to see if it worked and it did give a pattern. That was 15 years ago. The unit has been sat in an unheated garage all this time. From memory I would say it could have been built in the 60s but I'm not certain.

At some point in the next week or so I will retrieve the scope and see if it is still operational.

Is there anything I should check before powering up? I have no means of slowly bringing the working voltage up.

Once I dig it out I can give you more specs .

Cheers. Brett.
Brettski is offline   Reply With Quote
Old 10th Feb 2018, 1:58 pm   #2
Station X
Moderator
 
Station X's Avatar
 
Join Date: Jan 2003
Location: Ipswich, Suffolk, IP4, UK.
Posts: 13,322
Default Re: Oscilloscope not used in years

I would give it a spell in the airing cupboard or another warm place for a month or two before doing anything.
__________________
Graham. Forum Moderator

Keep the soldering iron hot.
Station X is offline   Reply With Quote
Old 10th Feb 2018, 2:46 pm   #3
Brettski
Tetrode
 
Brettski's Avatar
 
Join Date: Dec 2017
Location: York, North Yorkshire, UK.
Posts: 55
Default Re: Oscilloscope not used in years

Ok. It will give me some time to read up on using said item. Would be great if it works .

If you could leave the thread open I will get some more details of the model and the members might be able to shed some light on its origins etc.

Many thanks.
Brettski is offline   Reply With Quote
Old 10th Feb 2018, 3:11 pm   #4
Refugee
Dekatron
 
Refugee's Avatar
 
Join Date: Apr 2012
Location: Worksop, Nottinghamshire, UK.
Posts: 3,050
Default Re: Oscilloscope not used in years

You will certainly need to reform the capacitors before giving it any real power at least.
Refugee is offline   Reply With Quote
Old 10th Feb 2018, 3:18 pm   #5
mole42uk
Octode
 
mole42uk's Avatar
 
Join Date: Aug 2010
Location: Bristol, UK
Posts: 1,434
Default Re: Oscilloscope not used in years

If you could tell us the make and model of the oscilloscope we might know of any particular things to watch out for.
__________________
Richard

Index:
recursive loop: see recursive loop
mole42uk is offline   Reply With Quote
Old 10th Feb 2018, 4:43 pm   #6
Diabolical Artificer
Dekatron
 
Diabolical Artificer's Avatar
 
Join Date: Jul 2009
Location: Sleaford, Lincs. UK.
Posts: 3,374
Default Re: Oscilloscope not used in years

Build a lamp limiter and power it through that. Better than nowt.

Andy.
__________________
Curiosity hasn't killed this cat...so far.
Diabolical Artificer is offline   Reply With Quote
Old 10th Feb 2018, 7:04 pm   #7
Brettski
Tetrode
 
Brettski's Avatar
 
Join Date: Dec 2017
Location: York, North Yorkshire, UK.
Posts: 55
Default Re: Oscilloscope not used in years

Hi . It’s a tecalemit . I’m struggling to copy and paste the code on my iPad, but there is a photo in my album if you care to take a peek.

Cheers.
__________________
I'm a Roberts addict !!
Brettski is offline   Reply With Quote
Old 10th Feb 2018, 7:21 pm   #8
ColinTheAmpMan1
Heptode
 
ColinTheAmpMan1's Avatar
 
Join Date: Jan 2012
Location: Wimbledon, London, UK.
Posts: 710
Default Re: Oscilloscope not used in years

Quote:
Originally Posted by Brettski View Post
Itís a tecalemit .
Are you sure? As far as I am aware, Tecalemit make garage equipment. I suppose it could be some kind of engine analyser....
How do we access your photo album?
Colin.
ColinTheAmpMan1 is offline   Reply With Quote
Old 10th Feb 2018, 7:27 pm   #9
Mr Moose
Heptode
 
Join Date: Jul 2008
Location: Gloucestershire, UK.
Posts: 876
Default Re: Oscilloscope not used in years

Hello,
It appears to be a Telequipment S51A from the picture.
Yours, Richard
Mr Moose is offline   Reply With Quote
Old 10th Feb 2018, 8:20 pm   #10
AC/HL
Moderator
 
AC/HL's Avatar
 
Join Date: Nov 2003
Location: Heckmondwike, West Yorkshire, UK.
Posts: 6,174
Default Re: Oscilloscope not used in years

From Brettski's album:
Attached Thumbnails
Click image for larger version

Name:	user42368_pic3967_1518285293.jpeg
Views:	263
Size:	59.8 KB
ID:	157149  
__________________
Bill, BVWS member
AC/HL is offline   Reply With Quote
Old 10th Feb 2018, 8:55 pm   #11
ajgriff
Tetrode
 
ajgriff's Avatar
 
Join Date: May 2004
Location: Halifax, West Yorkshire, UK.
Posts: 96
Default Re: Oscilloscope not used in years

It is indeed a sixties Telequipment S51A Serviscope. Basic valve scope but well worth a pound. Have just restored one of these after years in storage and will post more info when I get a spare minute.

Alan
ajgriff is offline   Reply With Quote
Old 10th Feb 2018, 8:58 pm   #12
Brettski
Tetrode
 
Brettski's Avatar
 
Join Date: Dec 2017
Location: York, North Yorkshire, UK.
Posts: 55
Default Re: Oscilloscope not used in years

Thanks AC/HL . Could well be vehicle related. I work in the motor trade and we sell Tecalimit ramps .

Quote:
Originally Posted by ajgriff View Post
It is indeed a sixties Telequipment S51A Serviscope. Basic valve scope but well worth a pound. Have just restored one of these after years in storage and will post more info when I get a spare minute.
Ooo yes please. Any pointers you have would be greatly appreciated.

Iím guessing I will be able to learn how to use this and apply it to restoring Transistor radios .

Many thanks. Brett.
__________________
I'm a Roberts addict !!
Brettski is offline   Reply With Quote
Old 10th Feb 2018, 9:52 pm   #13
MrBungle
Nonode
 
MrBungle's Avatar
 
Join Date: Jun 2016
Location: London, UK.
Posts: 2,378
Default Re: Oscilloscope not used in years

Don’t those have those big selenium stick rectifiers? Not sure I’d be happy to fire one up without replacing it if it did.
MrBungle is offline   Reply With Quote
Old 11th Feb 2018, 3:22 am   #14
Refugee
Dekatron
 
Refugee's Avatar
 
Join Date: Apr 2012
Location: Worksop, Nottinghamshire, UK.
Posts: 3,050
Default Re: Oscilloscope not used in years

Yes those things do tend to get a bit whiffy when they are powered up after damp or being left unused for a few years.
Refugee is offline   Reply With Quote
Old 11th Feb 2018, 7:59 am   #15
Diabolical Artificer
Dekatron
 
Diabolical Artificer's Avatar
 
Join Date: Jul 2009
Location: Sleaford, Lincs. UK.
Posts: 3,374
Default Re: Oscilloscope not used in years

They do Mr B and often die when first powered up.

If it were mine Brett, open it up, check that all the valves are there and no valves gone to air, they will be white if they have, and have no getter silvering.

Next check that all resistors and caps look ok, post some good quality pics here, some members have eyes like hawks and can spot a dodgy component from 1000ft.

Give the valves a wiggle, check there are no dead spiders etc sitting across EHT components and GENTLY power up on a lamp limiter. A variac would be better, but you haven't got one.

These are good scopes to cut your teeth on, being pretty simple.

Andy.
__________________
Curiosity hasn't killed this cat...so far.
Diabolical Artificer is offline   Reply With Quote
Old 11th Feb 2018, 10:07 am   #16
Brettski
Tetrode
 
Brettski's Avatar
 
Join Date: Dec 2017
Location: York, North Yorkshire, UK.
Posts: 55
Default Re: Oscilloscope not used in years

Thanks Andy, I’m going to leave it for a while to dry properly. But I will get it opened at some point.

Watch this space
__________________
I'm a Roberts addict !!
Brettski is offline   Reply With Quote
Old 11th Feb 2018, 3:33 pm   #17
turretslug
Nonode
 
Join Date: Nov 2011
Location: Surrey, UK.
Posts: 2,311
Default Re: Oscilloscope not used in years

Definitely go along with being patient with a long, month + stretch in a warm, dry place before even thinking about powering. If there was ever a common weak spot with just about every CRT 'scope ever made, it's the EHT supply wound components- whether mains- or HF-inverter derived, there are many, many turns of fine wire with lots of volts between them just looking for an excuse for a burn-up and long-term humidity and lack of use encourage insulation degradation. A good excuse to knock up a lamp-limiter in the time and use a 60W or thereabouts bulb to ensure a gentle-wake-up stint before it gets full mains,

Good luck with it, Colin.
turretslug is offline   Reply With Quote
Old 11th Feb 2018, 9:30 pm   #18
MotorBikeLes
Octode
 
Join Date: Dec 2012
Location: Kirk Michael, Isle of Man
Posts: 1,045
Default Re: Oscilloscope not used in years

I have reconditioned dozens of the TQ valve scopes with the long selenium HV rectifiers. I have NEVER had a smelly failure. However I did find the output voltage reduced, presumably due to age and use. I made up a simple tester using a neon relaxation oscillator with which I just counted the flash rate. A bit slow and replace, but as said, never a failure.
I have repaired quite a few TV sets with selenium multipliers, and whilst very aware others have had smelly failures, again I was lucky and never had one.
Les.
MotorBikeLes is offline   Reply With Quote
Old 11th Feb 2018, 11:39 pm   #19
The Philpott
Heptode
 
Join Date: Aug 2016
Location: Colchester, Essex, UK.
Posts: 997
Default Re: Oscilloscope not used in years

I dimly recall some equipment emitting these fumes being removed from the house at great speed by my father in about 1975. It is toxic and quite harsh on the lungs.
The Philpott is offline   Reply With Quote
Old 14th Feb 2018, 9:59 pm   #20
ajgriff
Tetrode
 
ajgriff's Avatar
 
Join Date: May 2004
Location: Halifax, West Yorkshire, UK.
Posts: 96
Default Re: Oscilloscope not used in years

Sorry for the delay Brett. Lots of good advice offered by others here. My S51A had been in a dry but unheated cellar for ten years when I decided to bring it out of mothballs. Originally came from a boot sale too.

I would take it out of its case now as that will help to air things out more quickly. Just undo the two screws at the back and the chassis will slide out forwards. Can take a bit of jiggling.

Google and download the manual. Study the user instructions carefully so you know what it should do when it comes to testing. There were several different versions of the S51 (A, B, E & T from memory). They're all similar in terms of use but the circuit diagrams vary so don't worry about those for the moment.

Do construct a lamp limiter as described on the main pages of this site and make sure you understand how to use it. Mine actually fired up without any problems once I'd sorted out the mains cable earth wire which had broken away at the solder joint. This fault was obvious (and dangerous) with the case removed. By the way, the mains lead on mine used the old red, black and green colour scheme.

I notice that your main interest is battery powered radios so don't even think of messing with the scope internally unless you are entirely confident about the safety measures needed when dealing with very high voltages. Often said here but worth repeating I think.

Best of luck and let us know how you get on.

Alan
ajgriff is offline   Reply With Quote
Reply

Thread Tools



All times are GMT +1. The time now is 3:59 pm.


All information and advice on this forum is subject to the WARNING AND DISCLAIMER located at https://www.vintage-radio.net/rules.html.
Failure to heed this warning may result in death or serious injury to yourself and/or others.


Powered by vBulletin®
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Copyright ©2002 - 2018, Paul Stenning.