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

[Joseph Orgnero]

Thank you Ed for the advice, re your comments. The -150 V is OK, I don't see 
light on the rectifiers but being sosmall is hard to tell, I don't get any 
deflection using the external horizontal input.
As for the HV measurement, I'm using a Simpson 260 on the 5 KV range. Is 
this the right kind of meter>
I'll keep investigating.
73's
Joe
----- Original Message ----- 
From: <k4pf at juno.com>
To: <test-equipment at mailman.qth.net>
Sent: Thursday, October 07, 2010 1:51 PM
Subject: Re: [Test-Equipment] WTD: Help with old scope problem


>
>
> Hi, Joe
>
> Is the -150V correct?  Filaments lit on all 5642's?
>
> Using external horizontal input on rear panel, do you get
> any horizontal deflection?
>
> Do you have another 'scope to work on this Tek 310A scope?
>
> You need a very hi Z meter to look at the HV,
> like a 20K Ohms per volt VOM with a 5KV scale.
> (100 Meg Ohms resistance on that range)
>
> 73,
> Ed Knobloch
>
>
> "Joseph Orgnero" <josepho at shaw.ca> wrote
>>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.
>
>
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