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Old 7th February 2013, 03:41 PM   #71
nuryev is offline nuryev  Australia
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I finally got a dual trace analogue oscilloscope, an Aron BS601. Doing a lot of reading and fiddling with controls and still finding my way with the language and terminology. Hope to start the trouble shooting on the weekend.
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Old 7th February 2013, 05:40 PM   #72
Mooly is offline Mooly  United Kingdom
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That sounds promising.
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Old 8th February 2013, 03:32 PM   #73
nuryev is offline nuryev  Australia
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Default Aron BS601 oscilloscope

It is only a 20mhz scope and I hope it is adequate. Although it is an oldie it looked clean and well maintained. Only time will tell if it is worth the $60 I paid for it - including probes.
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Old 8th February 2013, 04:36 PM   #74
Mooly is offline Mooly  United Kingdom
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20Mhz is fine for most work. Remember, an analogue scope doesn't stop responding at its bandwidth limit, the response tails off beyond that point. It would probably resolve over 30Mhz at lower vertical deflections.

It looks a good buy.
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Old 10th February 2013, 02:20 AM   #75
nuryev is offline nuryev  Australia
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I managed to do a calibration test and got a nice square sine wave, dont know it that is anything worth mentioning. Now trying components tests but not successful yet.
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Old 10th February 2013, 03:42 AM   #76
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Quote:
Originally Posted by nuryev View Post
I managed to do a calibration test and got a nice square sine wave, dont know it that is anything worth mentioning. Now trying components tests but not successful yet.
The calibration signal should be square. It should go up by the same distance, and for the same time, as it goes down.

A sine is a sine...if it were square the world would be very strange
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Old 10th February 2013, 05:25 AM   #77
nuryev is offline nuryev  Australia
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Oops!! Thanks for correcting me on that. Yes it is a square wave. Any info on using a scope to test caps, resistors and diodes?
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Old 10th February 2013, 12:02 PM   #78
nuryev is offline nuryev  Australia
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Default scope tests

First test results at testpoint 9 before and after audio drop out.
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Old 10th February 2013, 05:13 PM   #79
Mooly is offline Mooly  United Kingdom
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That looks pretty decent as such. I'm not sure what the amplitude is as you would need to check the scope calibration, and make sure any variable attenuators on the V/DIV control are in the "CAL" position (those inner red controls).

So when the audio drops out I'm guessing you don't see any change in the RF ?
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Old 11th February 2013, 02:32 PM   #80
nuryev is offline nuryev  Australia
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The red controls are switchable and were clicked to the left in "CAL" position.

No change in RF when audio drops out.
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