Google Groups no longer supports new Usenet posts or subscriptions. Historical content remains viewable.
Dismiss
Help Repairing Antique Scope
0 views
Skip to first unread message
Heath Young
Feb 24, 2002, 6:26:41 PM2/24/02
to
Hey all...
I have just aquired a vintage oscilloscope cheaply at $10
(a tech scope, single trace, round 2" screen, valve based) that has a
very weird shaped trace - kinda like a bass cleft? Anyways, this is an
old scope, that uses valves (and I know *nothing* about these) would it
be safe to assume that capacitors have gone leaky/dead and should be
replaced? It is a very simple looking circuit. Uses newer looking
wire-wound resistors as well. I assume that the usual checks /
restoration tips apply - replace all caps, check resistors for correct
values and if that doesn't help, replace valves - there are only three
valves, and it is the smallest scope of this vintage I have ever seen -
its kinda cute and would be great to take some of the load off my
(older, but still working) Tech 'scope.
I have just aquired a vintage oscilloscope cheaply at $10
(a tech scope, single trace, round 2" screen, valve based) that has a
very weird shaped trace - kinda like a bass cleft? Anyways, this is an
old scope, that uses valves (and I know *nothing* about these) would it
be safe to assume that capacitors have gone leaky/dead and should be
replaced? It is a very simple looking circuit. Uses newer looking
wire-wound resistors as well. I assume that the usual checks /
restoration tips apply - replace all caps, check resistors for correct
values and if that doesn't help, replace valves - there are only three
valves, and it is the smallest scope of this vintage I have ever seen -
its kinda cute and would be great to take some of the load off my
(older, but still working) Tech 'scope.
Comments, ideas suggestions?
Cheers
Heath Young
Sam Goldwasser
Feb 24, 2002, 7:53:58 PM2/24/02
to
Heath Young <heath...@hotmail.com> writes:
Yes, start with the electrolytic caps in the power supply, then all paper
caps.
The one thing you do need to be careful about is the voltages - they are
all high! (At least compared to what you are used to with transistor stuff!).
--- sam | Sci.Electronics.Repair FAQ Home Page: http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Site Info: http://www.repairfaq.org/REPAIR/F_mirror.html
Jon Scott
Feb 24, 2002, 10:06:10 PM2/24/02
to
I'd suggest the easiest thing first - clean the switches. I had a similar
problem with my non-antique scope, and a little tuner cleaner in the
selector switches cleared it right up.
problem with my non-antique scope, and a little tuner cleaner in the
selector switches cleared it right up.
Heath Young
Feb 24, 2002, 10:41:22 PM2/24/02
to
Hmmm... Didn't think of that - might be worth a try... The Scope I would like
to restore, it is a really nice, simple piece of gear that would be ideal,
the old one that I have works OK, but drifts, I mean to get around to
restoring it properly, but have never done it - you open the case, look
inside and then decide to do something else with your time! :o)
to restore, it is a really nice, simple piece of gear that would be ideal,
the old one that I have works OK, but drifts, I mean to get around to
restoring it properly, but have never done it - you open the case, look
inside and then decide to do something else with your time! :o)
This one is much smaller and simpler, so it is worth my time (I think) to
spend some time fixing it up.
Cheers
Heath Young
0 new messages