Author Topic: Tektronix 2235 stiff time / div knob?  (Read 98 times)

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Offline Mjkdar

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Tektronix 2235 stiff time / div knob?
« on: June 24, 2021, 05:46:26 pm »
I picked up a virtually new condition 2235 tektronix oscilloscope. The time / division knob seems stiff . When I pull out the knob for the time delay, that turns quite easily. Is it normal because it's turning both sets of knobs to be quite stiff? I lubed the shaft of a little, but don't see any points inside to lubricate that would help.
« Last Edit: June 24, 2021, 06:06:11 pm by Mjkdar »
 

Offline bob91343

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Re: Tektronix 2235 stiff time / div knob?
« Reply #1 on: June 24, 2021, 06:01:43 pm »
The shaft may be bent, or the knob may be rubbing.  The worst would be a damaged wafer.
 

Offline Mjkdar

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Re: Tektronix 2235 stiff time / div knob?
« Reply #2 on: June 24, 2021, 06:09:26 pm »
It doesn't appear to be rubbing anywhere and it's not binding. It just seems like a cam or something inside needs to be lubed a little.
 


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