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Re: What's the Tektronix part number for a dead spider
Be glad that is all it did. If there was a "interesting smell" the cat may
pee in or on it. Don't ask how I know...And mine wasn't on the ground.? Randy AB9GO The biggest thing that got into my plugins was my cat. I left a 1S1 on the ground like a slob and my cat wanted to sit on it. As he tried to get on top he used one of the tubes as a foot(paw?)-hold and bent all the pins on the tube. This message sent to you from my mobile device via speech-to-text technology. |
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Re: (OT) repair tools: Autotransformers/variacs
Hello All: Just saw this after some months of absence.
As a power electronics engineer the variacs are a fundamental tool, over the decades I have accumulated perhaps 50 - 100, all brands and sizes 1.25A...30A and 120V 1 ph to 240V 3 ph. I have not seen any significant differences Staco Powerstat, Variac, Superior, Gen Rad etc. The repairs and maintenance are mostly lube the bearing and replace the brushes. IF they are improperly shipped or treated, I have seen gashes in the windings and wire insulation scraped off but they all still worked. The problem in shipping is both the weight as well as the delicate windings if it is an open model. Serious users should avoid the Chinese copies and opt for a good condition used made in USA model mentioned above. Finally beware that the brush and its mounting finger or plate are at the output voltage and should be respected. Best Regards, Jon |
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Re: What's the Tektronix part number for a dead spider
Was working late one night on a plug-in made by the "other" test equipment manufacturer. The next morning when I went in to continue I had discovered that the "night crew" had been in there trying to help.
/g/TekScopes/album?id=249527 Greg |
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7A26 Probe sense oddity
Had a strange problem earlier. I have a 7904A fitted with 2x 7A26 and I suddenly found the probe x10 sense wasn't working on just one of the CH1 PI inputs (the same probe was checked on all four PI inputs). Shorting the ring to ground produced the expected OSD IDENTIFY result but touching a 10K resistor there didn't toggle the OSD to x10 (I think 10K is the correct value for this).
I assumed an internal PI issue but randomly pressing the Identify button and switching both the CH2 polarity and the BW (for no particular technical reason.... they were just there at hand!) the problem just disappeared! A 10K resistor then tapped on the ring confirmed the functionality. Just because it's now working again doesn't stop me from getting curious about what "fixed" it in case there's a next-time! Anybody got some suggestion as to what might have been the issue? Obviously the probe sense function is based on the degree of current passing into (out of) the ring; it was working for identify, but not for x10. |
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Re: What's the Tektronix part number for a dead spider
I had an intervention at an ATM where a mouse was caught by the straps that carried the money.I laughed with my colleagues that when it released cash it gave: a banknote, a mouse, a banknote, a mouse ..., you could get your paycheck in new currencies - "the mouse"
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On Monday, June 29, 2020, 06:19:52 PM GMT+3, Chuck Harris <cfharris@...> wrote:
Spiders in the plugins?? That's nothing!? I don't think mine would work without the spiders and the stinkbugs. For me, it is usually some critter trying to pimp my ride with modifications to the vacuum hoses, wiring harnesses, undercoating, and any sound deadening material. Seriously, cars have been made for what, 150 years? At this point in time, the designers have every millimeter of the body and chassis in a computer, and know where every hole the size of a mouse exists in the chassis.? And, they *still* can't keep mice out of cars? For starters, they could stop making them out of tasty food. Wire insulation made out of soy, sound deading made out of corn, and undercoating made out of what?... Cotton candy? Sorry for the diversion of the topic.? I just spent another day de-mousing. -Chuck Harris Colin Herbert via groups.io wrote: Look 210mm from the front panel and 91mm from the base. I think it may have |
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Re: What's the Tektronix part number for a dead spider
On Mon, Jun 29, 2020 at 11:19:43AM -0400, Chuck Harris wrote:
Seriously, cars have been made for what, 150 years?I spent a month last year demousing a convertible after taking it out of storage. Besides having to strip out the entire interior, I had to replace some of the A/C components because the mice ate the PVC heating ducts! At least the scopes have metal panels and generally keep out the bigger critters. I have a 555 out in my garage now. We'll see what manages to get into it. Paul -- Paul Amaranth, GCIH | Manchester MI, USA Aurora Group of Michigan, LLC | Security, Systems & Software paul@... | Unix/Linux - We don't do windows |
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Re: What's the Tektronix part number for a dead spider
Chuck Harris
Spiders in the plugins? That's nothing! I don't think
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mine would work without the spiders and the stinkbugs. For me, it is usually some critter trying to pimp my ride with modifications to the vacuum hoses, wiring harnesses, undercoating, and any sound deadening material. Seriously, cars have been made for what, 150 years? At this point in time, the designers have every millimeter of the body and chassis in a computer, and know where every hole the size of a mouse exists in the chassis. And, they *still* can't keep mice out of cars? For starters, they could stop making them out of tasty food. Wire insulation made out of soy, sound deading made out of corn, and undercoating made out of what?... Cotton candy? Sorry for the diversion of the topic. I just spent another day de-mousing. -Chuck Harris Colin Herbert via groups.io wrote: Look 210mm from the front panel and 91mm from the base. I think it may have |
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Re: What's the Tektronix part number for a dead spider
Dick
Found him, thanks.
73, Dick, W1KSZ ________________________________ From: [email protected] <[email protected]> on behalf of Colin Herbert via groups.io <colingherbert@...> Sent: Monday, June 29, 2020 8:04 AM To: [email protected] <[email protected]> Subject: Re: [TekScopes] What's the Tektronix part number for a dead spider Ah, yes! It looks like it has fallen in love with a Posidriv screw-head. Perhaps there are more and would they have different part-numbers dependant on where they are? -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of John Griessen Sent: 29 June 2020 15:49 To: [email protected] Subject: Re: [TekScopes] What's the Tektronix part number for a dead spider On 6/29/20 9:39 AM, n4buq wrote: I think it's sitting on a green-ish pot(?) just to the center/right of the picture.I stopped looking when I found a spider husk in the lower left, near second row from bottom of front panel knobs/pots. probably two of 'em. -- John |
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Re: What's the Tektronix part number for a dead spider
Ah, yes! It looks like it has fallen in love with a Posidriv screw-head. Perhaps there are more and would they have different part-numbers dependant on where they are?
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-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of John Griessen Sent: 29 June 2020 15:49 To: [email protected] Subject: Re: [TekScopes] What's the Tektronix part number for a dead spider On 6/29/20 9:39 AM, n4buq wrote: I think it's sitting on a green-ish pot(?) just to the center/right of the picture.I stopped looking when I found a spider husk in the lower left, near second row from bottom of front panel knobs/pots. probably two of 'em. -- John |
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Re: What's the Tektronix part number for a dead spider
John Griessen
On 6/29/20 9:39 AM, n4buq wrote:
I think it's sitting on a green-ish pot(?) just to the center/right of the picture.I stopped looking when I found a spider husk in the lower left, near second row from bottom of front panel knobs/pots. probably two of 'em. -- John |
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Re: What's the Tektronix part number for a dead spider
Look 210mm from the front panel and 91mm from the base. I think it may have
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been trying to calibrate some function.. -----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Dick Sent: 29 June 2020 15:36 To: [email protected] Subject: Re: [TekScopes] What's the Tektronix part number for a dead spider Where is it located ? 73, Dick, W1KSZ ________________________________ From: [email protected] <[email protected]> on behalf of snapdiode via groups.io <snapdiode@...> Sent: Sunday, June 28, 2020 10:41 PM To: [email protected] <[email protected]> Subject: [TekScopes] What's the Tektronix part number for a dead spider Can you see it? I thought it was funny. |
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Re: What's the Tektronix part number for a dead spider
I think it's sitting on a green-ish pot(?) just to the center/right of the picture.
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Thanks, Barry - N4BUQ ----- Original Message -----
From: "Dick" <w1ksz@...> |
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Re: What's the Tektronix part number for a dead spider
Dick
Where is it located ?
73, Dick, W1KSZ ________________________________ From: [email protected] <[email protected]> on behalf of snapdiode via groups.io <snapdiode@...> Sent: Sunday, June 28, 2020 10:41 PM To: [email protected] <[email protected]> Subject: [TekScopes] What's the Tektronix part number for a dead spider Can you see it? I thought it was funny. |
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D34 ghosting blur
Hello to the group, Any suggestions what could be causing this sort of blur which is modulated by the signal? It's strange fog. When I had this Telequipment D34 open I have changed capacitors on both the vertical and horizontal boards. Since it's battery operated this interference doesn't come from outside. |
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Re: Tektronix 2230
Hi leo
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Thanks once again for guiding me through repair process. Regarding the voltage issue you are right that my power supply has poor regulation. As you suggested I will try my best to replace those component and get back to you hopefully with good news. Saroj On Mon, Jun 29, 2020, 12:52 PM satbeginner <castellcorunas@...> wrote:
Hello Saroj, |
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RIFA madness (Re: [TekScopes] 2215 CRT problem, PSU filtering?)
On 2020-06-29, at 08:33, Maxsimmonds1337@... wrote:
They are more likely to explode when fed 230 V ~, and that is often what comes with 50 Hz (I know, not in east Japan, Jamaica, Cura?ao, Bonaire, Barbados, and a few parts of other countries). If they are cracked, and there is any potential of moisture having crept in or creeping in (i.e., you don¡¯t live in Phoenix, Arizona), they *will* explode, so it is a good idea to change them. Use a replacement that has a real plastic container, not the same broken clear epoxy dip again. Being a German, I like WIMA (even though they did similar exploding metal/paper caps in the 1980s¡). See or for a couple of mild cases captured on camera. Do wear protective eyewear when you need to work on them with power on! Gr¨¹?e, Carsten |
Randy.AB9GO
Jean-Paul
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