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

[J. Forster]

> Hello John,

[snip]
> - Focus has some effecto on the trace but not intensity (strap on rear OK)
> - With  9 VAC applied to the H input on the back, the spot becomes a
line, so, I assume that the H amplifier is OK.

Does the length of the line vary as you adjust the Horiz Gain (Rear Panel)?

> - With  6 VAC applied to the V input, I get a circular pattern (same
> phase) and multiple patterns with a higher frequency.
> - With the voltage calibrator connected to the V input, I get two bars
> with some hint of a square wave. I image due to the low frequency of the
> H input.

This was with the 60 Hz applied to the Ext Horiz or not?

> Both voltage controls (V and calibrator) displace the bars.
> - Neither time/division nor trigger controls have effect on the display.

Try rotating the Time/Div and Trig through it's full range. Do you get any
sweep while rotating the knob?

Set the Horiz Disp to X5 Mag. What is the voltage at pin 8 of V220B with
the Hor Pos set fully CCW and CW?

> - Any way to narrow it down?

Yes, follow the instructions above and report the numbers.

Best,

-John

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