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

[Joseph Orgnero]

Thank you Bob, the rest of the messages received agree with a problem on the 
horizontal sweep, question what is the guilty component?
Joe
----- Original Message ----- 
From: <WA5CAB at cs.com>
To: <test-equipment at mailman.qth.net>
Sent: Thursday, October 07, 2010 4:05 PM
Subject: Re: [Test-Equipment] WTD: Help with old scope problem


> 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
> wa5cab dot com (Web Store)
> MVPA 9480
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