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Quote from: mnementh on August 07, 2020, 02:48:53 pmQuote from: Neomys Sapiens on August 07, 2020, 02:43:51 pmQuote from: tggzzz on August 07, 2020, 05:40:43 amQuote from: drussell on August 07, 2020, 12:16:22 am(No, because those are types of PLIERS!! Not to be confused with slip-joint, needle-nose, linesman, etc!)Never forget virgin (pliers), e.g. http://www.wholesaleengineeringsupplies.com/three-prong-pliers-virgin-pliers.htmlThis is a rather peculiar name for a Dreidorn-Tüllendehnzange. Yeah.... I was wondering that myself. Those do look suspiciously similar to rubber-band de-nutting pliers commonly used on livestock. *realization dawns* OMG... these pliers are used to expand tight sleeving used for cabling work. Hence the colorful "term of endearment" referring to the phrase "tight like a virgin". I'm afraid Neomys Sapiens is right, and the astute will note they are Hellerman Electric. The points are surprisingly vicious.When I picked them up at a hamfest (knowing what they are used for), the vendor rather sheepishly asked me if I knew the colloquial name. When he mentioned it, it took several tens of milliseconds before I smiled.
Quote from: Neomys Sapiens on August 07, 2020, 02:43:51 pmQuote from: tggzzz on August 07, 2020, 05:40:43 amQuote from: drussell on August 07, 2020, 12:16:22 am(No, because those are types of PLIERS!! Not to be confused with slip-joint, needle-nose, linesman, etc!)Never forget virgin (pliers), e.g. http://www.wholesaleengineeringsupplies.com/three-prong-pliers-virgin-pliers.htmlThis is a rather peculiar name for a Dreidorn-Tüllendehnzange. Yeah.... I was wondering that myself. Those do look suspiciously similar to rubber-band de-nutting pliers commonly used on livestock. *realization dawns* OMG... these pliers are used to expand tight sleeving used for cabling work. Hence the colorful "term of endearment" referring to the phrase "tight like a virgin".
Quote from: tggzzz on August 07, 2020, 05:40:43 amQuote from: drussell on August 07, 2020, 12:16:22 am(No, because those are types of PLIERS!! Not to be confused with slip-joint, needle-nose, linesman, etc!)Never forget virgin (pliers), e.g. http://www.wholesaleengineeringsupplies.com/three-prong-pliers-virgin-pliers.htmlThis is a rather peculiar name for a Dreidorn-Tüllendehnzange.
Quote from: drussell on August 07, 2020, 12:16:22 am(No, because those are types of PLIERS!! Not to be confused with slip-joint, needle-nose, linesman, etc!)Never forget virgin (pliers), e.g. http://www.wholesaleengineeringsupplies.com/three-prong-pliers-virgin-pliers.html
(No, because those are types of PLIERS!! Not to be confused with slip-joint, needle-nose, linesman, etc!)
*stirs the pot*https://www.ebay.co.uk/itm/Keithley-2000-Bench-Digital-Multimeter/114341795244https://www.ebay.co.uk/itm/Oscilloscope-Tektronix-Set-Model-212/184391950920https://www.ebay.co.uk/itm/TEKTRONIX-468-DIGITAL-STORAGE-OSCILLOSCOPE-PP3/224107574495https://www.ebay.co.uk/itm/KEEP-CALM-and-Feck-off-Coffee-Cup-Gift-Idea-funny-present-rude/221629855296?var=520487396029
Quote from: Cerebus on August 07, 2020, 03:26:15 pmQuote from: mnementh on August 07, 2020, 02:41:05 pmHowever, only the ones made with a hammer portion on purpose are properly called a Thumb-Detecting Nut-fucker.Don't you think that being overly precise in "comedy names for tools" is perhaps a tad pedantic? (Rhetorical question)Yup. Sure do. This is just the place for that.
Quote from: mnementh on August 07, 2020, 02:41:05 pmHowever, only the ones made with a hammer portion on purpose are properly called a Thumb-Detecting Nut-fucker.Don't you think that being overly precise in "comedy names for tools" is perhaps a tad pedantic? (Rhetorical question)
However, only the ones made with a hammer portion on purpose are properly called a Thumb-Detecting Nut-fucker.
Hey Med, how's the post storm situation? All OK?
So working on the Type 3A6 Channel 2 issue and basically getting no where. Couldn't figure out why the waveform was getting distorted just before the final vertical amp. Need to do other things this afternoon so buttoned it up for now but put it on burn-in on channel 1 only. I was using a sine wave to troubleshoot Channel 2. Put Channel 1 on a square wave with no input on Channel 2. I happen to switch to Channel 2 only to check it's base line and look what I found. Channel 1 bleeding through to Channel 2. Didn't see that with the sine wave. I'd been barking up the wrong tree. The issue is lack of isolation between the channels. So that points directly at the switching circuit. So....when I pick up on this again going to apply same condition and then find out why Channel 2 is picking up an artifact of Channel 1.
Quote from: med6753 on July 26, 2020, 04:53:02 pmQuote from: 0culus on July 26, 2020, 04:37:08 pmQuote from: med6753 on July 26, 2020, 03:20:31 pmThe verdict on this Type 3A74 Vertical plug-in.......I managed to get 4 traces. All unstable with channel 3 being the worst. It bounces where ever it wants to. None will consistently pass a signal although I did manage to get channel 1 to pass something...and then it died. Apparently I'm going to have to dive into the attenuator switch decks and completely clean them too. Oh fun. I was hoping I wouldn't have to. But not today. Got other things to do. Into the repair cue.So the A trace from my Type CA was doing the bouncing thing, turned out to be the switching multivibrator tube being bad. It stopped when I swapped in another 12AT7.My planned tactic for working on this is to get channel 1 fully functional all the way to the Vertical output. That way I can use channel 1 as a template and a cross check while troubleshooting the other 3 channels since they are all identical.That's a good tactic, but I'd still say it's still worth checking the switching circuitry. I have discovered that it can cause trouble in non-obvious ways.
Quote from: 0culus on July 26, 2020, 04:37:08 pmQuote from: med6753 on July 26, 2020, 03:20:31 pmThe verdict on this Type 3A74 Vertical plug-in.......I managed to get 4 traces. All unstable with channel 3 being the worst. It bounces where ever it wants to. None will consistently pass a signal although I did manage to get channel 1 to pass something...and then it died. Apparently I'm going to have to dive into the attenuator switch decks and completely clean them too. Oh fun. I was hoping I wouldn't have to. But not today. Got other things to do. Into the repair cue.So the A trace from my Type CA was doing the bouncing thing, turned out to be the switching multivibrator tube being bad. It stopped when I swapped in another 12AT7.My planned tactic for working on this is to get channel 1 fully functional all the way to the Vertical output. That way I can use channel 1 as a template and a cross check while troubleshooting the other 3 channels since they are all identical.
Quote from: med6753 on July 26, 2020, 03:20:31 pmThe verdict on this Type 3A74 Vertical plug-in.......I managed to get 4 traces. All unstable with channel 3 being the worst. It bounces where ever it wants to. None will consistently pass a signal although I did manage to get channel 1 to pass something...and then it died. Apparently I'm going to have to dive into the attenuator switch decks and completely clean them too. Oh fun. I was hoping I wouldn't have to. But not today. Got other things to do. Into the repair cue.So the A trace from my Type CA was doing the bouncing thing, turned out to be the switching multivibrator tube being bad. It stopped when I swapped in another 12AT7.
The verdict on this Type 3A74 Vertical plug-in.......I managed to get 4 traces. All unstable with channel 3 being the worst. It bounces where ever it wants to. None will consistently pass a signal although I did manage to get channel 1 to pass something...and then it died. Apparently I'm going to have to dive into the attenuator switch decks and completely clean them too. Oh fun. I was hoping I wouldn't have to. But not today. Got other things to do. Into the repair cue.
That might be in spec. Check the calibration in the manual. There is some leakage in the switching diodes usually.
Quote from: mnementh on August 07, 2020, 03:02:52 pmSaskatchewan Screwdriver...? mnemThanks for the belly laugh... I needed it.That could be a regional (probably mostly just Alberta) thing. We tend to have quite the (mostly friendly) rivalry with Saskatchewan. Especially when the Roughriders are in town playing the Stampeders (CFL football) and vice-versa. The stands at McMahon Stadium are often half green instead of red on those days as half of Saskatchewan drives here, often like 1000km just to see their team try to take on the Stamps. At least there's only one Roughriders in the CFL now. For years, out of nine teams two of them were named Roughriders. It's like... come on Canada, we're generally reasonably well educated, we know enough vocabulary to come up with nine different team names. (Of course, all Ottawa came up with was the RedBlacks, but that is Ontario, after all... But I digress...) Oh, also... As an aside...When I was a kid, I didn't realize it was called crescent because they were often made by the Crescent Tool company, rather just that the end was shaped somewhat like a crescent, like the moon. Made perfect sense to me.
Saskatchewan Screwdriver...? mnemThanks for the belly laugh... I needed it.
https://www.ebay.co.uk/itm/TEKTRONIX-468-DIGITAL-STORAGE-OSCILLOSCOPE-PP3/224107574495
Quote from: med6753 on August 07, 2020, 04:06:09 pmSo working on the Type 3A6 Channel 2 issue and basically getting no where. Couldn't figure out why the waveform was getting distorted just before the final vertical amp. Need to do other things this afternoon so buttoned it up for now but put it on burn-in on channel 1 only. I was using a sine wave to troubleshoot Channel 2. Put Channel 1 on a square wave with no input on Channel 2. I happen to switch to Channel 2 only to check it's base line and look what I found. Channel 1 bleeding through to Channel 2. Didn't see that with the sine wave. I'd been barking up the wrong tree. The issue is lack of isolation between the channels. So that points directly at the switching circuit. So....when I pick up on this again going to apply same condition and then find out why Channel 2 is picking up an artifact of Channel 1. I believe I called this as something you should look at many pages ago! Quote from: 0culus on July 26, 2020, 05:09:55 pmQuote from: med6753 on July 26, 2020, 04:53:02 pmQuote from: 0culus on July 26, 2020, 04:37:08 pmQuote from: med6753 on July 26, 2020, 03:20:31 pmThe verdict on this Type 3A74 Vertical plug-in.......I managed to get 4 traces. All unstable with channel 3 being the worst. It bounces where ever it wants to. None will consistently pass a signal although I did manage to get channel 1 to pass something...and then it died. Apparently I'm going to have to dive into the attenuator switch decks and completely clean them too. Oh fun. I was hoping I wouldn't have to. But not today. Got other things to do. Into the repair cue.So the A trace from my Type CA was doing the bouncing thing, turned out to be the switching multivibrator tube being bad. It stopped when I swapped in another 12AT7.My planned tactic for working on this is to get channel 1 fully functional all the way to the Vertical output. That way I can use channel 1 as a template and a cross check while troubleshooting the other 3 channels since they are all identical.That's a good tactic, but I'd still say it's still worth checking the switching circuitry. I have discovered that it can cause trouble in non-obvious ways.
Quote from: AVGresponding on August 07, 2020, 03:11:59 pmhttps://www.ebay.co.uk/itm/TEKTRONIX-468-DIGITAL-STORAGE-OSCILLOSCOPE-PP3/224107574495The 468 looks OK, HOWEVER,Seller claims the 212 is used.Understatement.Picture confirms this.Assemble yourself project.Frans
Quote from: 0culus on August 07, 2020, 04:21:57 pmQuote from: med6753 on August 07, 2020, 04:06:09 pmSo working on the Type 3A6 Channel 2 issue and basically getting no where. Couldn't figure out why the waveform was getting distorted just before the final vertical amp. Need to do other things this afternoon so buttoned it up for now but put it on burn-in on channel 1 only. I was using a sine wave to troubleshoot Channel 2. Put Channel 1 on a square wave with no input on Channel 2. I happen to switch to Channel 2 only to check it's base line and look what I found. Channel 1 bleeding through to Channel 2. Didn't see that with the sine wave. I'd been barking up the wrong tree. The issue is lack of isolation between the channels. So that points directly at the switching circuit. So....when I pick up on this again going to apply same condition and then find out why Channel 2 is picking up an artifact of Channel 1. I believe I called this as something you should look at many pages ago! Quote from: 0culus on July 26, 2020, 05:09:55 pmQuote from: med6753 on July 26, 2020, 04:53:02 pmQuote from: 0culus on July 26, 2020, 04:37:08 pmQuote from: med6753 on July 26, 2020, 03:20:31 pmThe verdict on this Type 3A74 Vertical plug-in.......I managed to get 4 traces. All unstable with channel 3 being the worst. It bounces where ever it wants to. None will consistently pass a signal although I did manage to get channel 1 to pass something...and then it died. Apparently I'm going to have to dive into the attenuator switch decks and completely clean them too. Oh fun. I was hoping I wouldn't have to. But not today. Got other things to do. Into the repair cue.So the A trace from my Type CA was doing the bouncing thing, turned out to be the switching multivibrator tube being bad. It stopped when I swapped in another 12AT7.My planned tactic for working on this is to get channel 1 fully functional all the way to the Vertical output. That way I can use channel 1 as a template and a cross check while troubleshooting the other 3 channels since they are all identical.That's a good tactic, but I'd still say it's still worth checking the switching circuitry. I have discovered that it can cause trouble in non-obvious ways. Well, that wasn't the issue with the Type 3A74 but it does appear to be the issue with the this Type 3A6. So I'll give it to you the credit.
Quote from: FransW on August 07, 2020, 04:51:10 pmQuote from: AVGresponding on August 07, 2020, 03:11:59 pmhttps://www.ebay.co.uk/itm/TEKTRONIX-468-DIGITAL-STORAGE-OSCILLOSCOPE-PP3/224107574495The 468 looks OK, HOWEVER,Seller claims the 212 is used.Understatement.Picture confirms this.Assemble yourself project.FransAhh that 212 “used” is as in “used as a fleshlight by a whale”
Now that's a good idea. Was going to ask about that. Assuming it won't melt out of the gaps when it gets warm though. A thing I used to do at school was melt the things on a radiator
Ohhh, ok I had forgotten the model number. But I'll take the credit anyway. Planning to hop in discord today too.
Quote from: bd139 on August 07, 2020, 02:35:18 pmNow that's a good idea. Was going to ask about that. Assuming it won't melt out of the gaps when it gets warm though. A thing I used to do at school was melt the things on a radiator The best thing to there is to get a small tin of modellers black paint, Humbrol or similar and fine artists paint brush and paint in the engraving, polishing off any paint that comes over the side, carefully. No worry about that melting in the heat etc. Works perfectly if you take your time.
Quote from: 0culus on August 07, 2020, 05:41:31 pmOhhh, ok I had forgotten the model number. But I'll take the credit anyway. Planning to hop in discord today too.Uh, today is Friday. You are a day ahead of yourself boy.
Quote from: bd139 on August 07, 2020, 01:17:27 pmQuote from: tonyalbus on August 07, 2020, 11:54:00 amTurn out it seems very good... i thought the HP was 2 mV off... its a lot less (Attachment Link) where did you obtain that voltage ref? I really need one with this growing collection I just put a quick review together about it AD584KH.its now SD still prosessing HD will be better in a few minutes..
Quote from: tonyalbus on August 07, 2020, 11:54:00 amTurn out it seems very good... i thought the HP was 2 mV off... its a lot less (Attachment Link) where did you obtain that voltage ref? I really need one with this growing collection
Turn out it seems very good... i thought the HP was 2 mV off... its a lot less (Attachment Link)
Reasonably priced Thurlby 1905A:https://www.ebay.co.uk/itm/143675530574
Quote from: mnementh on August 07, 2020, 03:34:06 pmQuote from: Cerebus on August 07, 2020, 03:26:15 pmQuote from: mnementh on August 07, 2020, 02:41:05 pmHowever, only the ones made with a hammer portion on purpose are properly called a Thumb-Detecting Nut-fucker. Don't you think that being overly precise in "comedy names for tools" is perhaps a tad pedantic? (Rhetorical question)Yup. Sure do. This is just the place for that. Quote from: mnementhEvidently this (and many other such special "terms of endearment" for certain tools) was a "thing" among old-timers like him. Who am I to judge...? But I do feel somewhat honor-bound to pass on that "knowledge". The thing about a comedy name is that it has to be merely funny, even if only in a "dad joke" kind of way. Arguing over whether a comedy name is the "right" name is rather, well actually I don't know what to compare it to without unintentionally sounding insulting, but it's sorely missing the point of a comedy name which, if anything, has to be technically wrong to be funny in the first place. Being pedantic about comedy names kind of sucks all the joy out of them.
Quote from: Cerebus on August 07, 2020, 03:26:15 pmQuote from: mnementh on August 07, 2020, 02:41:05 pmHowever, only the ones made with a hammer portion on purpose are properly called a Thumb-Detecting Nut-fucker. Don't you think that being overly precise in "comedy names for tools" is perhaps a tad pedantic? (Rhetorical question)Yup. Sure do. This is just the place for that. Quote from: mnementhEvidently this (and many other such special "terms of endearment" for certain tools) was a "thing" among old-timers like him. Who am I to judge...? But I do feel somewhat honor-bound to pass on that "knowledge".
Quote from: mnementh on August 07, 2020, 02:41:05 pmHowever, only the ones made with a hammer portion on purpose are properly called a Thumb-Detecting Nut-fucker. Don't you think that being overly precise in "comedy names for tools" is perhaps a tad pedantic? (Rhetorical question)
Evidently this (and many other such special "terms of endearment" for certain tools) was a "thing" among old-timers like him. Who am I to judge...? But I do feel somewhat honor-bound to pass on that "knowledge".