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[dead tek 485] Can i fix it ? (newbie here)
Make sure to use a good contact cleaner / lube and clean ALL of the controls! Dirty switches can make for very interesting symptoms. I once acquired a 475 that almost did nothing - cleaning the contro
Make sure to use a good contact cleaner / lube and clean ALL of the controls! Dirty switches can make for very interesting symptoms. I once acquired a 475 that almost did nothing - cleaning the contro
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dnmeeks
· #176362
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Rail Probes?
Thanks, yeah I see the data sheet. I was hoping to know exactly how it's made. What's inside. The real scooby.
Thanks, yeah I see the data sheet. I was hoping to know exactly how it's made. What's inside. The real scooby.
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By
dnmeeks
· #166338
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Rail Probes?
Hey team - I changed roles at work and I ran into a new animal called a rail probe. I have never seen one of these things before, even though I have been doing analog and power for a few decades now.
Hey team - I changed roles at work and I ran into a new animal called a rail probe. I have never seen one of these things before, even though I have been doing analog and power for a few decades now.
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By
dnmeeks
· #166333
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TDS7xx Floppy Drive - free to a good home.
This has been taken.
By
dnmeeks
· #166320
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Extender on eBay looks like 7000 series? 3 available
Sorry the JM memorial extender has been taken.
Sorry the JM memorial extender has been taken.
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By
dnmeeks
· #166319
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TDS7xx Four Channel Hybrid Front End assembly
This has been spoken for -
This has been spoken for -
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By
dnmeeks
· #166318
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High Voltage / Video Board from TDS744
I used this for parts - the HV transformer and one IC (at least) are missing. No idea what the condition of the rest of the board is. I don't have any TDS scopes any more so need to find a home for it
I used this for parts - the HV transformer and one IC (at least) are missing. No idea what the condition of the rest of the board is. I don't have any TDS scopes any more so need to find a home for it
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By
dnmeeks
· #166316
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TDS7xx Four Channel Hybrid Front End assembly
I owned a few TDS scopes, a couple of 744s and then a 754. Don't have them any more. I have the front end module, with is the PCB assembly with the four front end hybrids in the metal cover. It has th
I owned a few TDS scopes, a couple of 744s and then a 754. Don't have them any more. I have the front end module, with is the PCB assembly with the four front end hybrids in the metal cover. It has th
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By
dnmeeks
· #166315
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TDS7xx Floppy Drive - free to a good home.
I don't have the scope anymore, and had replaced the floppy with USB. If you can use this, free for shipping from 78735. Dan
I don't have the scope anymore, and had replaced the floppy with USB. If you can use this, free for shipping from 78735. Dan
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By
dnmeeks
· #166314
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Extender on eBay looks like 7000 series? 3 available
I have a Jerry Massengale 7k extender here that I don't need. I forget how I got it from him - I think we traded something at one time. Happy to pass it along free to anyone in need, for cost of shipp
I have a Jerry Massengale 7k extender here that I don't need. I forget how I got it from him - I think we traded something at one time. Happy to pass it along free to anyone in need, for cost of shipp
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By
dnmeeks
· #166312
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3D printable feet for TDS500/600/700
Thanks Monty! Very generous to put it up for us to use. I need to check all my mainframes to see if I need any - I'm sure I'm missing some. If I print them I'll let you know how it turns out. Dan
Thanks Monty! Very generous to put it up for us to use. I need to check all my mainframes to see if I need any - I'm sure I'm missing some. If I print them I'll let you know how it turns out. Dan
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By
dnmeeks
· #164308
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TM500 / 5000 Extenders
Thanks everyone for the endorsement! I am really happy they have been useful. I don't have any more parts for building more, though. My cost for parts is about $20-$25 for each extender, with a purcha
Thanks everyone for the endorsement! I am really happy they have been useful. I don't have any more parts for building more, though. My cost for parts is about $20-$25 for each extender, with a purcha
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By
dnmeeks
· #162349
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TDS744
I've had a couple of TDS7x4 scopes with issues on that board. Below are some notes that I wrote up once for the group. Also I have a schematic that I got somewhere for a TDS544 HV board, and I was abl
I've had a couple of TDS7x4 scopes with issues on that board. Below are some notes that I wrote up once for the group. Also I have a schematic that I got somewhere for a TDS544 HV board, and I was abl
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By
dnmeeks
· #159948
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Tek 468 $20 on CL in Austin
I am getting this scope - will pick up later in the week or over the weekend. I don't need it but would like to find it a good home. I would ship from 78732 for actual shipping cost (plus the $20 purc
I am getting this scope - will pick up later in the week or over the weekend. I don't need it but would like to find it a good home. I would ship from 78732 for actual shipping cost (plus the $20 purc
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By
dnmeeks
· #159731
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P6139a with broken tip
Anyone looking for a replacement tip for a P6139A: Cal Test Electronics CT3667 is a perfect alternate. $22.50 on Mouser. I just got two, compared performance (rise time and ability to compensate) and
Anyone looking for a replacement tip for a P6139A: Cal Test Electronics CT3667 is a perfect alternate. $22.50 on Mouser. I just got two, compared performance (rise time and ability to compensate) and
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By
dnmeeks
· #159604
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Isolation???
Using the two-probe method that Mike suggested is the usual way of making a differential measurement (when expensive diff probes are not available, or when the voltages are too high for them). One thi
Using the two-probe method that Mike suggested is the usual way of making a differential measurement (when expensive diff probes are not available, or when the voltages are too high for them). One thi
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By
dnmeeks
· #157274
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Tek485 - a quick question on disabling/bypassing power supply protection
I had a 485 that hiccupped when I got it. The way I determined the bad rail was to look at the turn-on and turn-off edges while in hiccup mode. One rail didn't get as (proportionally) high when ON, an
I had a 485 that hiccupped when I got it. The way I determined the bad rail was to look at the turn-on and turn-off edges while in hiccup mode. One rail didn't get as (proportionally) high when ON, an
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By
dnmeeks
· #156478
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TekScopes - Digest #1192
Hello - I am out on business travel Sunday through Friday (4/7 through 4/12) this week. Replies may be delayed. Sorry for the inconvenience. Best regards Dan
Hello - I am out on business travel Sunday through Friday (4/7 through 4/12) this week. Replies may be delayed. Sorry for the inconvenience. Best regards Dan
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By
dnmeeks
· #156057
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TekScopes - Digest #1182
Hello - I am out on business travel Sunday through Friday (4/7 through 4/12) this week. Replies may be delayed. Sorry for the inconvenience. Best regards Dan
Hello - I am out on business travel Sunday through Friday (4/7 through 4/12) this week. Replies may be delayed. Sorry for the inconvenience. Best regards Dan
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By
dnmeeks
· #155945
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Conterfeit P6139A Probes?
I've owned several P6139s and they have all used the larger (3.5mm) cartridges. I just purchased four like-new ones, and they all use 2.5mm cartridges. First question - any chance these are counterfei
I've owned several P6139s and they have all used the larger (3.5mm) cartridges. I just purchased four like-new ones, and they all use 2.5mm cartridges. First question - any chance these are counterfei
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By
dnmeeks
· #155934
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