Re: 577 Retrace Problem
What you are seeing on your 577 with these settings is as good as anything I have ever seen on my 577. The different behavior with different amount of steps is very normal too. Depending on settings
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tom jobe <tomjobe@...>
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#152740
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Re: tektronix 475 help replace diode
Roberto...does it have to be a special Tektronix diode?....if not replaceable by some commoner one Dinos in Greece may have them....(qservice-electronics in Rhodes) Dennis Tillman recently put Dinos'
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Jack
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#152739
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Re: Floating Adapter 013-0156-00
Removing an earth does not make anything doubly insulated unless it already was doubly earthed . Earthing the case of an isolating transformer is not the same as connecting it to the chassis of the
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Jack
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#152738
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tektronix 475 power supply repair succesful working !!!!!
hello to all my usual problem with tektronix 475 in the power supply voltages since now: 50v 33 v 50v to reg 67 105-160v 132 + 15v 5.53 5v 3.25 -15v -8..8 -8v -5.12 110 v 86.4 v Fixed the problem
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Roberto
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#152737
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Re: Floating Adapter 013-0156-00
Chapter and verse about isolation transformer configurations here https://www.middleatlantic.com/resources/white-papers.aspx And here, towards the end https:/
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Craig Sawyers <c.sawyers@...>
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#152736
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tektronix 475 help replace diode
hello all groups I have to replace it in my oscilloscope tek475 part TEKTRONIX 152-0246-00 DIODE SILICON 400piv 200 ma , cd12676 help me Roberto
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Roberto
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#152735
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Re: Floating Adapter 013-0156-00
Thanks, Egge Siert. I found the manual and in fact useful schematic to use this floating connector. .
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BUR
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#152734
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Re: 577 Retrace Problem
OK. I uploaded another series of pictures. Same folder: /g/TekScopes/album?id=79121 I used a different 2N3055 than in the previous pictures. Settings: - Vertical: 50mA/Div -
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Wolfgang Schraml
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#152733
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Re: 577 Retrace Problem
On Fri, Nov 23, 2018 at 05:11 PM, Chuck Harris wrote: > > I have to wonder what were your settings for H Voltage, and > V Current, Supply voltage and load impedance, and your step size. > > You can
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Wolfgang Schraml
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#152732
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Re: Floating Adapter 013-0156-00
Hi Craig. The question of isolation transformer never really goes away. If you continue earthing of say an isolating transformer case to a ¡®consumer¡¯ case when servicing consumer/appliances you
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Jack
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#152731
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Re: 577 Retrace Problem
I have to wonder what were your settings for H Voltage, and V Current, Supply voltage and load impedance, and your step size. You can curve trace a 3055 at amps of current, or you can trace it at
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Chuck Harris <cfharris@...>
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#152730
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Re: Floating Adapter 013-0156-00
That again. No it's not an absolute requirement that there is a ground connection to the output of an isolation transformer. In fact european standards absolutely demand that there not be one. The
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stefan_trethan <stefan_trethan@...>
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#152729
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Re: 577 Retrace Problem
For whatever it might be worth, I tried six variations of 2N3055 on a 577 that has had only enough repairs to keep it functioning. The 3055's varied with a 3055H and a 3055HV mixed in with epitaxial
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tom jobe <tomjobe@...>
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#152728
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Re: Tektronix 475A intermittent / lazy sweep
Hi All The CATS (Crawley Amateur Transmitting Society) rally is correctly known as the CATS Bazaar, it was not last month but is was held on the 15th November. If you are into Amateur Radio or T&M kit
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george edmonds
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#152727
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Re: 577 Retrace Problem
I'm not at all surprised - a 2N3055 is a power transistor with a very large junction area. So it has a very high capacitance. I'd have to look it up, but one of Tek's curve tracer manuals sets out a
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Craig Sawyers <c.sawyers@...>
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#152726
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Re: 577 Retrace Problem
That part is good. That is a bit on the nasty side. I'm more concerned not with the doubling of traces (which could be argued), but the lack of blanking showing through. Is there a blanking waveform?
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Harvey White
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#152725
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Re: Floating Adapter 013-0156-00
This has, as one recommendation, using an isolation transformer. However, it is an absolute requirement that there is ground continuity between primary and secondary of an isolation transformer. Think
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Craig Sawyers <c.sawyers@...>
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#152724
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577 Retrace Problem
Still working on my 577 (see my other post regarding power supply restoration). Voltages are all good now (after replacing all electrolytic caps and tantalums on the power supply and collector supply
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Wolfgang Schraml
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#152723
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Re: Floating Adapter 013-0156-00
Hi, It is a 5L4N Accessory. Some clues are given in its Manual. Greetings, Egge Siert
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Egge Siert
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#152722
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Re: Scope wanted, England.
I bought a Hantek dual trace 200 mhz scope about a year ago. It cost about 350 bucks. I also have a couple of 465 scopes. The Hantek has its advantages in some situations. Of course be reminded it is
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Michael
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#152721
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