Re: Tektronix 454A Oscilloscope No Trace but Beam Finder works fine?
Tom, I had that same thought when seeing Barry Breaux's post this morning about a 465 he's parting out. I wonder if that's the message you're thinking
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Adam R. Maxwell
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#207804
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Re: Tektronix 454A Oscilloscope No Trace but Beam Finder works fine?
Hi Jeff,
How did you determine that those transistors were bad? If you used one of those do-it-all component testers, check again with a DMM or curve tracer. The testers can break down the
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Tom Lee
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#207803
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Re: Tektronix 454A Oscilloscope No Trace but Beam Finder works fine?
Perfect! I'll order some of these transistors. Thanks for sharing the info, Mark!
Jeffrey
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Jeffrey Wang
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#207802
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Re: Tektronix 454A Oscilloscope No Trace but Beam Finder works fine?
Jeffrey,
A KSP10BU will replace the bad transistor. The pinout is BEC. This transistor will replace others as well. The 0367 is an example.
Mark
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Mark Vincent
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#207801
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DC balance pot on 575 curve tracer
Hi everyone,
My 575 curve tracer¡¯s DC balance on front panel won¡¯t calibrate properly. I am following the calibration procedures in the manual. The dot won¡¯t center, with the pot range
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Anita Abranovic
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#207800
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Re: Tektronix 454A Oscilloscope No Trace but Beam Finder works fine?
I'm glad to share that I've successfully identified the culprit: transistor Q364. I tracked it down by shorting the bases of transistors on the upper and lower rails, block by block, starting with the
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Jeffrey Wang
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#207799
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New method for 7K SMPS problem diagnosis
I'm on my last 7K repair project, another 7904. This one has been a PITA with a failure inside the power supply. I had gotten it down to suspecting something in the HV supply, and set it aside a while
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ed breya
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#207798
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Re: Quarter-turn panel fasteners
They¡¯re not in fact Dzus (yes sorry my incorrect prior spelling) - as those indeed rely on a fixed receptacle, whereas the ones on the 130 have ¡®ears¡¯ that when rotated slide being the edge of
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Richard Kelly
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#207797
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Re: 80E04 sampling module - fair price?
Well, those are expensive birds, mostly because of the hybrid frontends.
But you still can buy a non-functional one for $200 - $500.
A typical 8x00 series plugin contains a hybrid frontend where the
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Andrei Yershov
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#207796
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Re: DSA 602, Still Relevant Today? Untimely response FWIW
I'm pretty sure he has a 100,000 m^2 building with a 1,000 elv...err...electronic engineers, graphic designers, etc., working for him. "Retirement" just can't explain this feat.
Seriously, hats off
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n4buq
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#207795
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Tektronix 465
Greetings from Louisiana!
I have 3 465's and I am parting one out. If anyone needs a part let me know.
I pulled all the transistors, they are in sockets. I had about 6 transistors that were bad. I
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Barry Breaux
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#207794
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SC503 Vertical Position Issue
Greetings from Louisiana!
Working on a Tektronics SC503 that still has a few issues. I got the power supplies sorted out and I am able to finally see a trace on the CRT. Its bright and beautiful and
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Barry Breaux
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#207793
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Re: DSA 602, Still Relevant Today? Untimely response FWIW
Gianni,
This is truly the missing manual for my DSA 602.
Thank you,
George KD6NEW
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Glydeck
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#207792
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Re: 80E04 sampling module - fair price?
Well, one just sold on epay for approximately $5K. The '04 is a TDR
sampler. If you just want a sampler, I suggest you try for the 80E02. The
bandwidth is 12.5 GHz.
(TDR samplers will be more
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Mark Kahrs
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#207791
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Re: Solder - Tin/Silver or Tin/Lead/Silver?
Greetings,
I have a TEK 575 curve tracer and on page 4-2 of the service section of the manual it states:
¡°It is advisable that you have a stock of solder containing about 3% silver if you
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ken chalfant
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#207790
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Re: 80E04 sampling module - fair price?
Yes I understand and totally agree.
But, that doesn't answer my original question, what would a fair price be ? ;)
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Wevie
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#207789
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Re: DSA 602, Still Relevant Today? Untimely response FWIW
You, sir, are simply amazing. I have had TWO of these for 25 years, and been so distracted that I have NEVER even turned them on! You got one less than 15 days back, and have written a BEAUTIFUL
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Jeff Kruth
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#207788
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Re: Quarter-turn panel fasteners
Do a search on ¡°Dzus fasteners¡± (yes, Dzus is the correct spelling). There
is a wide variety of them from various sources. I am not familiar with the
particular diameter and length of the ones
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stevenhorii
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#207787
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Re: Solder - Tin/Silver or Tin/Lead/Silver?
The Tek 500 tube scopes of 1950s...1960s include a small roll of the original Tek silver soldering for ceramic strip repair
The 25 mm roll is usually on the chassis top, see service manual.
The
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Jean-Paul
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#207786
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Re: Quarter-turn panel fasteners
Hi again, will unearth my 130 LC, and compare the quarter turn twist lock to the ones on my 7000 MF scopes .
Am sure they are available, similar used in aviation, mil, etc.
Jon
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Jean-Paul
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#207785
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