Search found 501 matches
- Fri Sep 06, 2024 7:53 pm
- Forum: Test Equipment
- Topic: Test Equipment Anonymous (TEA) : Discussion and Group Therapy Thread
- Replies: 2969
- Views: 482038
Re: Test Equipment Anonymous (TEA) : Discussion and Group Therapy Thread
Here's a rare one. A Dumont 2100GA portable scope. Dumont Labs was bought by Fairchild in 1960 but the writing at the bottom of the scope says "Dumont Oscilloscope Labs". I've never seen or heard of any Dumont scope much past the early 1960's. From what little info I can find this one date...
- Sun Aug 25, 2024 6:48 pm
- Forum: Test Equipment
- Topic: Test Equipment Anonymous (TEA) : Discussion and Group Therapy Thread
- Replies: 2969
- Views: 482038
Re: Test Equipment Anonymous (TEA) : Discussion and Group Therapy Thread
This Scott 330C has a three position wide/normal/narrow bandwidth selection that would be interesting to hear an AM music station through. I'm thinking about pulling it off the shelf and doing a restoration and alignment on it. Does this sound like a good fall project? Excellent Fall project. But b...
- Fri Aug 23, 2024 10:42 pm
- Forum: Test Equipment
- Topic: Keithley 179 bench multimeter
- Replies: 34
- Views: 3399
Re: Keithley 179 bench multimeter
I'd rather find a precision ACV cal source at a reasonable price. Good luck. ![Rolling Eyes :roll:](./images/smilies/icon_rolleyes.gif)
![Rolling Eyes :roll:](./images/smilies/icon_rolleyes.gif)
- Fri Aug 23, 2024 8:21 pm
- Forum: Test Equipment
- Topic: Keithley 179 bench multimeter
- Replies: 34
- Views: 3399
Re: Keithley 179 bench multimeter
Finally got around to checking the calibration of the 175. It sat for 3 days straight powered up due to a distraction of working on Blondie's Honda Accord. It had an electrical issue which took some time to fix. I'm getting too old to be bending under the hood of a car and my back is letting me know...
- Tue Aug 20, 2024 7:25 pm
- Forum: Test Equipment
- Topic: Keithley 179 bench multimeter
- Replies: 34
- Views: 3399
- Mon Aug 19, 2024 8:03 pm
- Forum: Test Equipment
- Topic: Test Equipment Anonymous (TEA) : Discussion and Group Therapy Thread
- Replies: 2969
- Views: 482038
Re: Test Equipment Anonymous (TEA) : Discussion and Group Therapy Thread
I wonder how many times cats have gotten the blame for things they've had no involvement with? I know mine got blamed for a number of things that I later found out he wasn't responsible for. He never got into the test equipment but kitchenwares on the other hand... I cannot leave TE disassembled on...
- Sun Aug 18, 2024 7:26 pm
- Forum: Test Equipment
- Topic: Test Equipment Anonymous (TEA) : Discussion and Group Therapy Thread
- Replies: 2969
- Views: 482038
- Sun Aug 18, 2024 7:20 pm
- Forum: Test Equipment
- Topic: Interesting findings on the internet
- Replies: 801
- Views: 160853
Re: Interesting findings on the internet
Is the British bond system still based upon a lottery or is it now interest based like US savings bonds?
- Fri Aug 16, 2024 7:15 pm
- Forum: Test Equipment
- Topic: Test Equipment Anonymous (TEA) : Discussion and Group Therapy Thread
- Replies: 2969
- Views: 482038
Re: Test Equipment Anonymous (TEA) : Discussion and Group Therapy Thread
Things that go bump in the night. Last night I hear this loud crash coming from the lab. What did the cat get into now? :o Go into the lab and find my custom made probe rack on the floor in a twisted mess. And several pieces broken off the probe rack. So today repaired the rack and untangled all the...
- Sun Aug 11, 2024 1:13 am
- Forum: Test Equipment
- Topic: Keithley 179 bench multimeter
- Replies: 34
- Views: 3399
- Sat Aug 10, 2024 3:00 pm
- Forum: Test Equipment
- Topic: Keithley 179 bench multimeter
- Replies: 34
- Views: 3399
- Fri Aug 09, 2024 7:14 pm
- Forum: Test Equipment
- Topic: Keithley 179 bench multimeter
- Replies: 34
- Views: 3399
Re: Keithley 179 bench multimeter
Rather than start a new thread I'll continue here. The Keithley 175 is here. In VG condition and initial checks of DCV and Ohms shows that it's spot on. I'll be doing my usual clean up and re-cap. While I'm not thrilled with the brown case it will remain as is. At least it's much better than the awf...
- Thu Aug 08, 2024 12:36 pm
- Forum: Test Equipment
- Topic: Keithley 179 bench multimeter
- Replies: 34
- Views: 3399
Re: Keithley 179 bench multimeter
Decided to make an offer. We'll see.
- Wed Aug 07, 2024 1:01 pm
- Forum: Test Equipment
- Topic: Keithley 179 bench multimeter
- Replies: 34
- Views: 3399
Re: Keithley 179 bench multimeter
There's a Keithley 175 on my local CL about 15 minutes away from a seller I've done business with before and he's legit. Price is good and supposedly works. Can't make up my mind to go for it or not. I have plenty of DMM's here but no Keithley's. Did I just say that? :lol: https://hudsonvalley.craig...
- Tue Jul 09, 2024 9:06 pm
- Forum: Test Equipment
- Topic: TEK TM503 Project
- Replies: 68
- Views: 22657
Re: TEK TM503 Project
Finishing up this project. I made an executive decision to not replace the capacitor shown, plus one under it, on the TM503 supply at this time. In order to get the old ones out it will take major disassembly and lots of cursing to get the tabs unsoldered from the board. I have replacements in stoc...
- Tue Jul 09, 2024 6:54 pm
- Forum: Test Equipment
- Topic: TEK TM503 Project
- Replies: 68
- Views: 22657
Re: TEK TM503 Project
Finishing up this project. I made an executive decision to not replace the capacitor shown, plus one under it, on the TM503 supply at this time. In order to get the old ones out it will take major disassembly and lots of cursing to get the tabs unsoldered from the board. I have replacements in stock...
- Tue Jul 09, 2024 4:52 pm
- Forum: Test Equipment
- Topic: Tektronix 475
- Replies: 25
- Views: 6254
Re: Tektronix 475
You will pick up noise and fuzz up the trace with the cover off. I speak from experience.
- Tue Jul 09, 2024 12:53 am
- Forum: Test Equipment
- Topic: TEK TM503 Project
- Replies: 68
- Views: 22657
Re: TEK TM503 Project
Re-cap and initial check out of the PS503 Power Supply. Re-capped. https://imagizer.imageshack.com/v2/xq70/923/yrRTCg.jpg After replacing the electrolytics and before replacing the tants decided to do an initial test. The supply came up fine, for about 5 minutes, then the positive supply went into c...
- Mon Jul 08, 2024 5:54 pm
- Forum: Test Equipment
- Topic: Wouldn't happen with an ASR33
- Replies: 19
- Views: 6661
- Fri Jul 05, 2024 11:13 pm
- Forum: Test Equipment
- Topic: Test Equipment Anonymous (TEA) : Discussion and Group Therapy Thread
- Replies: 2969
- Views: 482038
Re: Test Equipment Anonymous (TEA) : Discussion and Group Therapy Thread
Chris, I never got any warnings on the phone that the battery was failing. The only indication I got was when the rear cover seal broke.
- Fri Jul 05, 2024 6:55 pm
- Forum: Test Equipment
- Topic: Test Equipment Anonymous (TEA) : Discussion and Group Therapy Thread
- Replies: 2969
- Views: 482038
Re: Test Equipment Anonymous (TEA) : Discussion and Group Therapy Thread
Surprise and a close call. This is my Moto 2021 Android phone. The rear case started separating. And the reason is clearly visible. The Lithium battery has swelled. Holy shit. :shock: I bought a new phone today. I'm leaving the old phone powered up but NOT charging until the battery goes completely ...
- Wed Jul 03, 2024 5:00 pm
- Forum: Test Equipment
- Topic: TEK TM503 Project
- Replies: 68
- Views: 22657
Re: TEK TM503 Project
The calibration of the FG501 went smoothly with just minimal adjustments required. This unit is now done. https://imagizer.imageshack.com/v2/xq70/923/ZGV2gp.jpg Some sample waveforms. The output impedance of this function generator is 50 ohms so the 2465 vertical was set to 50 ohms. https://imagizer...
- Tue Jul 02, 2024 10:27 pm
- Forum: Test Equipment
- Topic: TEK TM503 Project
- Replies: 68
- Views: 22657
- Mon Jul 01, 2024 8:03 pm
- Forum: Test Equipment
- Topic: Tektronix 2215A
- Replies: 12
- Views: 3657
Re: Tektronix 2215A
I had the same issue (twice) with the HV divider resistors in a B&K 2120 20MHz scope.
- Mon Jul 01, 2024 5:46 pm
- Forum: Test Equipment
- Topic: TEK TM503 Project
- Replies: 68
- Views: 22657
Re: TEK TM503 Project
Back on topic. Working the FG501 Function Generator. Checked the internally generated supply voltages and both the +17V and -17V were reading about 5.09V. U430, a 741 op amp, was dead. Replaced it and now voltages are correct. https://imagizer.imageshack.com/v2/xq70/922/zoAvQE.jpg We now have an out...