[sdiy] OT: Oscilloscope repair, Hameg HM303

[Tom Arnold]

On Thu, Apr 13, 2006 at 08:53:58AM +0200, Hermann-Simon Lichte wrote:
> Today I happened to pick up an old Hameg HM303 scope from uni. The  
> guy from the lab told me that it was not working properly. Something  
> is wrong with the high voltage circuitry. The high voltage is not  
> generated anymore. He also told me that it could be repaired, but he  
> wouldn't do it due to lack of time. Has anyone in here ever done such  
> a thing (i.e., fixing a broken scope themselves)? And if so, is it  
> worth it?

Funny you should mention repairing a scope.
I just finished fixing my "new" Tek468.  I figure the time on fixing a scope
is worthwhile if its a decent scope and/or the problem is simple.

That HM303 looks to be fairly new ( still in production ).  I'd think it
would be worth attempting a repair at least.  Maybe even worth finding out
how much a professional repair would cost.  If its $125 to get fixed, thats
not a bad deal for a 35mhz scope.

If you do poke around it yourself, I have to remind you that high voltage is
dangerous.  Most of the scopes I work on have 30kv+ and if you arnt carefull
will disolve screwdrivers and bodily throw you across your workshop.

-- 
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 - Tom Arnold       -  Free Synth DIY webspace http://www.sdiy.org 
 - SynthGeek        -
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