[Test-Equipment] WTD: Help with old scope problem

[WA5CAB at cs.com]

Joe,

I'm not familiar with the 310 but your last point (spot splits in two) is 
consistant with loss of horizontal sweep.  The cal signal is a square wave.  
The vertical amp is still moving the trace up and down as it should.

In a message dated 10/7/2010 5:55:42 PM Central Daylight Time, 
xyzzypdx at gmail.com writes: 
> >Hello
> >For a number of years Ihave been using a Tek 310A on my bench. I like it 
> on spite of its age and limited BW because of its small size and sharp 
> trace. Recently,after not have been used for some months, presnted a number of 
> problems.
> >- There is no horizontal trace, only a spot.
> >- The spot can be moved in both directions (V&H).
> >- The focus control has only limited effect on the spot.
> >- The intensity control has no effect on it.
> >- The tubes related to the horizontal and sweep sections check OK.
> >- There are no broken, burnt or overheated components.
> >- LV voltages are OK but I cannot get a reading on the HV test point 
> (5642 rectifiers).
> >- If I apply a signal from the voltage calibrator, the spot splits on 
> two.
> >Any suggestions as to the cause of these problems (and fixes) will be 
> greatly appreciated.
> >Thanks
> >Joe Orgnero  VE7LBI
> 

Robert Downs - Houston
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MVPA 9480