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Re: OT: +19.5 V connector on laptop computers
On Mon, 16 Jul 2018 13:12:56 -0700, you wrote: I've seen a standardization to several end destinations. One is that the voltage rating seems to determine the size of the barrel connector. That's now,
By Harvey White · #149778 ·
Re: Homemade tunnel diodes
This is hardly relevant, but it might be of interest to note that many TVS diodes exhibit negative resistance section. I have made a proof-of concept oscillator that uses a TVS as an oscillator.
By Leo Bodnar · #149777 ·
Re: OT: Scopes and other electronics on "The Outer Limits"
Yeah. It was a small town AM radio station with maybe 10,000 watts. What gets me is how he pushed microwaves through that tower that was clearly not built for it, and at a strength to reach pretty far
By Jeff Urban · #149776 ·
Re: land lines for security system call ins or battery backed wireless? OT
Was this meant to be in the Tek Scopes list ?
By Pete Lancashire · #149775 ·
Re: 465B Square Wave problem
Thanks for your input I am using a short 50ohm bnc to bnc and it displays the correct wave on my other scopes. I just tried a second 2ft bnc to bnc and get the same result. The attenuators such as c36
By Timothy · #149774 ·
Re: OT: Scopes and other electronics on "The Outer Limits"
AAAAHHHH, I think I remember that one. the guy from Family Ties was on it and he was a scientist who figured the sun had gone nova, but it turned out to be a solar flare. He had the hots for this
By Jeff Urban · #149773 ·
land lines for security system call ins or battery backed wireless? OT
The land line is $60/month here now. Anyone recommend a system keypad, main system board with cellphone function, and monitoring service that is low cost for the cell phone line charge and the
By John Griessen <john@...> · #149772 ·
Re: OT: +19.5 V connector on laptop computers
Oh, and your post would not be considered off topic in TestgearNotTekscopes. A computer is definitely test gear. Actually so are amplifiers if you work on tuners, CD DVD players, tape decks. A tuner
By Jeff Urban · #149771 ·
Re: OT: +19.5 V connector on laptop computers
They do seem to be approaching some modicum of standardization finally. My sister had 2 laptops different brands and the power supplies were interchangeable, and my Gateway supply runs them as well.
By Jeff Urban · #149770 ·
Re: 465B Square Wave problem
I would say the same thing. But after "I have changed some of the attenuator settings and even tried adjusting the compensation from the preamp board but it has little effect." I would think more work
By Brendan · #149769 ·
Re: 465B Square Wave problem
I would say your probe is the causing this problem not the scope.
By Craig Cramb · #149768 ·
Re: Concentric A and B time-base knobs/interlocking
If it is cyanoacrylate on nylon hell need it. I have never had luck gluing nylon. Even Plas-T-pair did nothing. If any glue works on it it seems like it works as a filler, Filling knurling or grooves
By Jeff Urban · #149767 ·
Re: 465B Square Wave problem
What I used to set up my 465 was... PG506, assorted attenuators, 50ohm through termination, 20pf standardizer, 50ohm cables, the manual and surely I'm missing something. Everything done in order as
By Brendan · #149766 ·
Re: 465 Stuck in Add Mode (solved)
I dont want to post bad info. I was up until 2am last night and I thought I had it licked before I went to bed. I just powered up the scope and when I switch from channel one to channel two it is back
By Timothy · #149765 ·
Re: 465B Square Wave problem
I am in the process of accumulating these devices and plan to learn to calibrate my scopes. Although I know they wont be certified they at least will be usable. At the moment I have a 60mhz
By Timothy · #149764 ·
Re: 465B Square Wave problem
On Mon, Jul 16, 2018 at 10:28 AM, Timothy wrote: > > I have a 465B that had a intermittent beam. 90% of the time the screen was > blank. I ended up changing the multiplier (although I am not sure that
By Brendan · #149763 ·
Re: 468 DSO Calibration/troubleshooting
Hello Colin, I think I've reached my limit here to what I can understand / suggest, regarding a scope I don't own and don't have previous experience with. I can't understand very well how can the
By Fabio Trevisan · #149762 ·
Re: Concentric A and B time-base knobs/interlocking
Some months ago I had a similar problem on my 465. Turned out that the plastic pin/cam in the inner (B) shaft that engages the B drum was broken (fatigue and age). I solved the problem in the same
By unclebanjoman · #149761 ·
465B Square Wave problem
I have a 465B that had a intermittent beam. 90% of the time the screen was blank. I ended up changing the multiplier (although I am not sure that was the problem) and the vertical output board and now
Re: 464/466 DM44 install instruction
Got it thanks Hakan appreciate that Jim
By v_12eng@... · #149759 ·