[Test-Equipment] WTD: Help with old scope problem
Joseph Orgnero
josepho at shaw.ca
Mon Oct 11 13:26:07 EDT 2010
Hello Ed,
I took the measurements before reading this last message, so I don't know if
they are correct.
- 1 pin 1 of V10, I read 33 VAC but I have to set the calibrator to 100 to
reach tht value
- 2 pin 7 of V40, same as above
- 3 pin 1 of V40, I read 8 VAC
If I set the calibrator to 1 V, there is barely a flick on the meter.
Does the above helps?
Re. 260, there appears to be problem here, too. I don't get any reading on
the 300 VDC test point.
thank you again for taking your time on this.
Joe
----- Original Message -----
From: <k4pf at juno.com>
To: <test-equipment at mailman.qth.net>
Sent: Monday, October 11, 2010 7:20 AM
Subject: Re: [Test-Equipment] WTD: Help with old scope problem
>
> Hi, Joe
>
> Further to my last, I forgot to mention the conditions of the vertical
> input. The calibrator should be set to 1V peak-to-peak,
> and the vertical sensitivity at 0.5V per division,
> to match the conditions of the Tek 310A schematic.
> I presume use of direct probes, not divide by 10.
>
> The measurement point specified is roughly midway
> between the shaped trigger pickoff signal
> from the vertical amplifier circuits
> and the input to the triggered sweep, so we can see
> if the triggering signal is not getting to the sweep.
>
> 73,
> Ed Knobloch
>
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