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Vintage Test Gear and Workshop Equipment For discussions about vintage test gear and workshop equipment such as coil winders. |
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6th Oct 2020, 4:13 pm | #21 | |
Dekatron
Join Date: Apr 2009
Location: Oxfordshire, UK.
Posts: 4,924
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Re: Adding a Timebase Output to an old Scope
Quote:
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6th Oct 2020, 4:18 pm | #22 |
Guest
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Re: Adding a Timebase Output to an old Scope
When I was but an impoverished teeneager I used 50Hz potted down from a filament supply for both 'scope and wobbulator. You get a bit of a double trace due to the filter delays but the average is spot on unlike a sawtooth drive.
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7th Oct 2020, 1:27 am | #23 |
Moderator
Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 22,801
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Re: Adding a Timebase Output to an old Scope
The double trace with a sinusoidal scan can be an advantage when sweeping narrow filters. It tells you when to slow the weep down. You can't do that with the mains, but with an audio generator you can.
With this sort of test, play around with sweep speed. Make it faster and watch the picture distort, then slow down watching the distortion reduce. When you get to the point where further slowing makes no further difference to the picture and you're there! David
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