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PG506 of solid gold
No precursor, I'm just stunned by the winning bid of over $500. Nenad F.
No precursor, I'm just stunned by the winning bid of over $500. Nenad F.
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Nenad Filipovic
· #179132
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PG506 of solid gold
I'd appreciate the enlightenment why somebody dished out >$500 for a PG506: https://www.ebay.co.uk/itm/Tektronix-PG-506-Calibration-Generator-/224356816953 A few months ago I was the second highest bi
I'd appreciate the enlightenment why somebody dished out >$500 for a PG506: https://www.ebay.co.uk/itm/Tektronix-PG-506-Calibration-Generator-/224356816953 A few months ago I was the second highest bi
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By
Nenad Filipovic
· #179127
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Help for DC503A universal counter repair
Hi Atilio, Not on my unit, at least one zero should be lit. Without signal, the number of (zero) digits lit and decimal point position depends on the averaging setting (AVGS). Changing AVGS also affec
Hi Atilio, Not on my unit, at least one zero should be lit. Without signal, the number of (zero) digits lit and decimal point position depends on the averaging setting (AVGS). Changing AVGS also affec
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By
Nenad Filipovic
· #177653
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bandwidth
Hi Bob, You did not mention using any termination in your setup. Your HP 8657B performance is specified only if terminated with 50Ohm. Even if you did use an external 50Ohm terminator with your Tek 24
Hi Bob, You did not mention using any termination in your setup. Your HP 8657B performance is specified only if terminated with 50Ohm. Even if you did use an external 50Ohm terminator with your Tek 24
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By
Nenad Filipovic
· #177527
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Mechanism of CRT Double Peaking (UPDATED)
Hi Jeff, 5103N appears to be only the module mainframe, separate from the CRT unit. However I found the CRT circuit to be similar (if not identical) among the 5000 series models, so no problem there.
Hi Jeff, 5103N appears to be only the module mainframe, separate from the CRT unit. However I found the CRT circuit to be similar (if not identical) among the 5000 series models, so no problem there.
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By
Nenad Filipovic
· #175965
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Slightly OT: How can I dissolve Potting Compound?
Hi Dennis, I believe it's not worth the effort, I'd personally build a new one using instructions from Sam's Laser FAQ: https://www.repairfaq.org/sam/laserhps.htm#hpstoc You'll find wealth of informat
Hi Dennis, I believe it's not worth the effort, I'd personally build a new one using instructions from Sam's Laser FAQ: https://www.repairfaq.org/sam/laserhps.htm#hpstoc You'll find wealth of informat
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By
Nenad Filipovic
· #175843
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Mechanism of CRT Double Peaking (UPDATED)
Hi Chuck, Yes, I agree we derailed the subject by going deep into the cathode issues, but I still instinctively believe that double peaking explanation may be within grasp (without major research). Un
Hi Chuck, Yes, I agree we derailed the subject by going deep into the cathode issues, but I still instinctively believe that double peaking explanation may be within grasp (without major research). Un
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By
Nenad Filipovic
· #175589
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Mechanism of CRT Double Peaking (UPDATED)
Perhaps my statement wasn't precise enough, I meant to say "if the interface layer was behind the double peaking phenomenon...", not question the interface layer existence per se. Oxide cathode is so
Perhaps my statement wasn't precise enough, I meant to say "if the interface layer was behind the double peaking phenomenon...", not question the interface layer existence per se. Oxide cathode is so
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By
Nenad Filipovic
· #175568
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Mechanism of CRT Double Peaking (UPDATED)
If the "interface layer" theory was true then the same negative resistance phenomenon would also be observable in conventional tubes. Personally I've never seen one behave like that, although I curve
If the "interface layer" theory was true then the same negative resistance phenomenon would also be observable in conventional tubes. Personally I've never seen one behave like that, although I curve
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By
Nenad Filipovic
· #175527
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Spectrum analyzer Tektronix 7L13 on mainframe Tektronix 7603
The eBay ad is a mess but the device is decent, well worth it but won't do wonders for $20. It's a white noise source, just a plain Zener diode hooked to a wideband amplifier. Reference (average) leve
The eBay ad is a mess but the device is decent, well worth it but won't do wonders for $20. It's a white noise source, just a plain Zener diode hooked to a wideband amplifier. Reference (average) leve
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By
Nenad Filipovic
· #175511
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Spectrum analyzer Tektronix 7L13 on mainframe Tektronix 7603
I've got one very much like this: https://www.ebay.com/itm/0-2-2000M-Noise-Signal-Generator-Simple-Spectrum-Tracking-Source-High-Flatness/174453557146 It's reasonably flat and worth the price. You mig
I've got one very much like this: https://www.ebay.com/itm/0-2-2000M-Noise-Signal-Generator-Simple-Spectrum-Tracking-Source-High-Flatness/174453557146 It's reasonably flat and worth the price. You mig
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By
Nenad Filipovic
· #175461
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Spectrum analyzer Tektronix 7L13 on mainframe Tektronix 7603
Using 7L* SAs in 7854 is a song. It's not just the digital storage, it's the averaging that can significantly help smooth the measurement and increase your SNR. I do it all the time with my 7L5 and al
Using 7L* SAs in 7854 is a song. It's not just the digital storage, it's the averaging that can significantly help smooth the measurement and increase your SNR. I do it all the time with my 7L5 and al
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By
Nenad Filipovic
· #175442
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Rescuing 500s from tube snatchers/scavengers - how much is it worth
Hi Everybody, Inspired by recent talk of the admirable 500 series, I'd like to share my story and some questions that keep bugging me. I'm in Eastern Europe. A month ago a local trader in scavenged EE
Hi Everybody, Inspired by recent talk of the admirable 500 series, I'd like to share my story and some questions that keep bugging me. I'm in Eastern Europe. A month ago a local trader in scavenged EE
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By
Nenad Filipovic
· #175440
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Mechanism of CRT Double Peaking (UPDATED)
I kind of confirmed my initial belief, Tektronix document 062-0852-01 (Cathode Ray Tubes by Chuck DeVere) clearly states on page 9 that CRT cathode is indirectly heated oxide based type. However, a Te
I kind of confirmed my initial belief, Tektronix document 062-0852-01 (Cathode Ray Tubes by Chuck DeVere) clearly states on page 9 that CRT cathode is indirectly heated oxide based type. However, a Te
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By
Nenad Filipovic
· #175417
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Mechanism of CRT Double Peaking (UPDATED)
Hi Everybody, I still believe that we're missing the proper explanation. A credible theory must precisely describe the mechanism behind the negative resistance which obviously occurs here. Negative re
Hi Everybody, I still believe that we're missing the proper explanation. A credible theory must precisely describe the mechanism behind the negative resistance which obviously occurs here. Negative re
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By
Nenad Filipovic
· #175406
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Need a good way to measure audio transformer impedance
Hi Walter, Jeffrey's comment is spot on, we need to know more about the type/application of the transformer(s) you intend to measure (line level, inter-stage, output...?) I suppose that'd also answer
Hi Walter, Jeffrey's comment is spot on, we need to know more about the type/application of the transformer(s) you intend to measure (line level, inter-stage, output...?) I suppose that'd also answer
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By
Nenad Filipovic
· #174607
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7L5 Res shaft encoder
Today I attempted disassembly of my Resolution/Freq. Span knob and got halfway there, photos (album name "7L5 Knob Repair Attempt"): https://groups.io/g/TekScopes/album?id=256833&p=Name,,,20,1,0,0 The
Today I attempted disassembly of my Resolution/Freq. Span knob and got halfway there, photos (album name "7L5 Knob Repair Attempt"): https://groups.io/g/TekScopes/album?id=256833&p=Name,,,20,1,0,0 The
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By
Nenad Filipovic
· #173386
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7L5 Res shaft encoder
intermittently fault to 100k, 200k and 500k respectively. I have a 7L5 with a similar problem and it's driving me nuts. Restoration of front panel PCB sockets made no difference, so it all points to t
intermittently fault to 100k, 200k and 500k respectively. I have a 7L5 with a similar problem and it's driving me nuts. Restoration of front panel PCB sockets made no difference, so it all points to t
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By
Nenad Filipovic
· #173317
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Cleaning TM500 module pushbutton switches
blueyonder.co.uk@groups.io> wrote: research chemist living in Britain, I have no idea of what this is and others may not also. It _could_ be "petroleum ether", which I am familiar with, but that comes
blueyonder.co.uk@groups.io> wrote: research chemist living in Britain, I have no idea of what this is and others may not also. It _could_ be "petroleum ether", which I am familiar with, but that comes
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By
Nenad Filipovic
· #169068
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Cleaning TM500 module pushbutton switches
pushbutton switches (the square small ones). Is there a recommended cleaning procedure? I was going to do the standard use of Caig's DeOxit in a sparing manner, but perhaps there is a better way. > In
pushbutton switches (the square small ones). Is there a recommended cleaning procedure? I was going to do the standard use of Caig's DeOxit in a sparing manner, but perhaps there is a better way. > In
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By
Nenad Filipovic
· #169060
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