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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
By Adam R. Maxwell · #207804 ·
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
By Tom Lee · #207803 ·
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
By Jeffrey Wang · #207802 ·
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
By Mark Vincent · #207801 ·
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
By Anita Abranovic · #207800 ·
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
By Jeffrey Wang · #207799 ·
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
By ed breya · #207798 ·
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
By Richard Kelly · #207797 ·
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
By Andrei Yershov · #207796 ·
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
By n4buq · #207795 ·
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
By Barry Breaux · #207794 ·
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
By Barry Breaux · #207793 ·
Re: DSA 602, Still Relevant Today? Untimely response FWIW
Gianni, This is truly the missing manual for my DSA 602. Thank you, George KD6NEW
By Glydeck · #207792 ·
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
By Mark Kahrs · #207791 ·
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
By ken chalfant · #207790 ·
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 ? ;)
By Wevie · #207789 ·
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
By Jeff Kruth · #207788 ·
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
By stevenhorii · #207787 ·
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
By Jean-Paul · #207786 ·
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
By Jean-Paul · #207785 ·