Re: Tantalums cant take surges. (Subject was Aluminiumversus Tantalum Electrolytics)
There is no lean towards the lower tolerance for Rubycon or Nippon Chemicon (some Panasonic) if correctly measured: <http://i48.tinypic.com/2i040mr.png> At 1k you will measure a lower value, I got 5%
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Stefan Trethan <stefan_trethan@...>
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#81849
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Re: Jumpy trigger control on Tektronics 475
It looks like the sine wave has a lot of noise. Does selecting HF Rej for the A trigger help? You may need to get a better ground between your sine wave source and scope to minimize the noise. An all
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John Gord
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#81847
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Re: 468 triggering issue
Alright I realized I could couple the cal. signal into the ext. trigger bnc with my second scope probe... silly me! Unfortunately it didn't change anything, meaning that I still have my untriggered
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jeromequelin <jerome.quelin@...>
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#81846
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Re: Hi,I'm new to the group.
The confetti,seems to move with the trace,and blink in and out like a reflection,I'll try to get a pic Friday,the scope(a 464) is not here at the moment.I haven't looked a the crt closely,can the rods
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Scott Petersen
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#81845
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Re: Jumpy trigger control on Tektronics 475
This will not fix the problem but may help with diagnosis if there is a video camera synchronization issue. Fiddle with the trigger A holdoff control which is located toward the bottom right. Holdoff
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David Hess
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#81844
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Re: Tantalums cant take surges. (Subject was Aluminiumversus Tantalum Electrolytics)
I have found the same thing with old solid tantalums. Up until the time they short out, and some of the ones I have tested had already had other units of the same type fail, they test good for
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David Hess
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#81843
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Re: 468 triggering issue
It looks like I'm going to need some more coax for this :( But if I go into "A Trig View" mode, change source to ext. and press the beam finder button, a straight but slightly distorted trace appears
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jeromequelin <jerome.quelin@...>
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#81842
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Re: Jumpy trigger control on Techtronic's 475
My guess is everyone saw the square wave flashing bright and the periodicity of the loss of sync matching. I do not know enough to know if the apparent frequency of 1 cycle for both is an artifact of
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Rob <rgwood@...>
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#81841
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Re: 468 triggering issue
Feed the test signal into the Ch1 and the Ext trigger input. Select Ext on the trigger source. What happens? Tom
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Tom Miller
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#81840
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468 triggering issue
Hello everyone. I just got this wonderful 468 that is in great physical shape, in and out (the boards are gorgeous!), but sadly I believe that it has a triggering issue. I am rather new to electronics
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jeromequelin <jerome.quelin@...>
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#81839
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Re: Hi,I'm new to the group.
Best guess is one of the glass support rods in the crt fractured and dropped a few tiny shards of glass inside the tube. These would damage the expansion mesh creating the "confetti". It's a guess,
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teamlarryohio
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#81838
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Re: Hi,I'm new to the group.
Hi Scott, I have never seen that one but ripple on the power supply can do weird things. Check for ripple. Jerry Massengale
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jerry massengale
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#81837
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Re: Jumpy trigger control on Tektronics 475
You mentioned you had it open and looked at the power supplies. What did you see? It looks like something has about a one Hz period. Probe through the trigger board, the vertical amp board, etc.
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Tom Miller
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#81836
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Hi,I'm new to the group.
I have been searching posts,and with google and I can't seem tofind the answer,My 465 scope seems to be working properly except for some sparkles,artifactsn,and reflections on the screen,intensity and
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Scott Petersen
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#81835
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Re: Jumpy trigger control on Tektronics 475
Came through 4 times Sent on the TELUS Mobility network with BlackBerry
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bktheking1975
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#81834
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Re: Jumpy trigger control on Tektronics 475
Here's a new video that could help. http://youtu.be/5W90wzlM7yc or http://www.youtube.com/watch?v=5W90wzlM7yc&feature=youtu.be
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dawtesla2
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#81833
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Re: Jumpy trigger control on Tektronics 475
Here's a new video that could help. http://youtu.be/5W90wzlM7yc or http://www.youtube.com/watch?v=5W90wzlM7yc&feature=youtu.be
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dawtesla2
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#81832
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Re: Jumpy trigger control on Tektronics 475
Here's a new video that could help. http://youtu.be/5W90wzlM7yc or http://www.youtube.com/watch?v=5W90wzlM7yc&feature=youtu.be
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dawtesla2
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#81831
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Re: Jumpy trigger control on Tektronics 475
Here's a new video that could help. http://youtu.be/5W90wzlM7yc or http://www.youtube.com/watch?v=5W90wzlM7yc&feature=youtu.be
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dawtesla2
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#81830
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Re: Problem with a Tek SC-504 Scope (part of Tm 500 series)
2 allows more OT. Go ahead and post there also since the two are relatively separate. Don't have a SC504. Is your manual same as this one? http://bama.edebris.com/manuals/tek/sc504/ Else ask Dave,
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John Griessen <john@...>
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#81829
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