Re: Photos of a non-illuminated graticule; WAS 576 versus 577
Low phosphor response or fast decay shouldn't be as much trouble if you can mount some UV LEDs inside the hood so they can be left on continuously during the shot, or right up to it if there's visible
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Ed Breya
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#70258
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Re: Aluminum panels wanted
They get flagged as spam by my server which runs Spam Assassin. Try sending in plain text rather than html. Gordon
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Gordon <tekscopes@...>
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#70257
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Re: Aluminum panels wanted
Hello Heinz-Peter, to read your messages, I always have to leave my Thunderbird standard display and call the source text, there your message is OK and readable, but for some reason it will not appear
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Jokken Feldhaar
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#70256
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Re: 7603 no trace
On 23/01/2012 03:08, jtjewell83 wrote: > > David, > > More for you below. Hope it helps: > > > > > > > Could also be C866 is shorted, but that would be extemely rare. > > > To eliminate that, pull one
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David Miles <bwex@...>
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#70255
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Re: Aluminum panels wanted
mmh, the second time a text vanished ? In my own (yahoo) return copy, the text was there. After i tried to send the text again? - gone ??? strange behavior ... ------------------------------- Ok,
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Heinz-Peter Deutsch
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#70254
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Re: Photos of a non-illuminated graticule; WAS 576 versus 577
"Dennis Tillman" <dennis@...> wrote: I just tried banging on mine (with the filter off) using a big old Honeywell Strobonar that used to hang on a press camera. I've no doubt I fed it a bunch
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teamlarryohio
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#70253
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Re: Total beginner with newly acquired 475 with issues
You might want to purchase this: http://www.ebay.com/itm/Tektronix-475-Oscilloscope-Manual-ORGINAL-/28081\ 2488419?pt=BI_Oscilloscopes&hash=item4161ba86e3 <http://>
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Tad
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#70252
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Re: Photos of a non-illuminated graticule; WAS 576 versus 577
I did solve one problem with this little UV LED experiment: I now know how to take a photo of the Wiltron 640 RF Analyzer CRT. This instrument is built into a Tek 5000 series scope with a special
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Dennis Tillman W7pF
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#70251
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Re: Photos of a non-illuminated graticule; WAS 576 versus 577
Ed, Brad I didn't think about the plastic in front of the CRT. Removing it makes the 7934 storage CRT glow nicely. Removing it from the 577/D1 makes the phosphor glow faintly in PURPLE! I didn't
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Dennis Tillman W7pF
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#70250
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Re: Photos of a non-illuminated graticule; WAS 576 versus 577
Hi Brad, Correction to my original post where I said: "The other LED I tried was a 485nM one I just got." I meant so say: "The other LED I tried was a 385nM one I just got." 385nM is considered
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Dennis Tillman W7pF
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#70249
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Re: Aluminum panels wanted
Jerry, why you don't use empty (blind) panels ? Peter ============= Hi, I am building some 7K plugin kludges and need blank front panels. The 2 1/2"x5" panels with the turned up ends would be my first
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Heinz-Peter Deutsch
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#70248
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Re: AFG5101 questions...
Ordered a service manual, however it looks like a Lithium module on one of the end boards - made by Renata and marked 3V and "125-1". I can't find a data sheet for this thing, but I think its actually
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Nick de Smith
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#70247
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Re: Photos of a non-illuminated graticule; WAS 576 versus 577
Yes, UV LEDs are the way to go. The old school cameras we discussed had plenty of UV from actual UV lamps, or the high UV content from a xenon flash. The other variable is the UV loss in the plastic
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Ed Breya
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#70246
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Re: 7T11 trace shifting left as time/div rotated.
To be honest I didn't think of that possibility. Anyway, there was a lot to learn from such a silly bad contact. Albert
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Albert <aodiversen@...>
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#70245
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Re: Photos of a non-illuminated graticule; WAS 576 versus 577
<snip> Hello, Dennis-- Have you tried using ultraviolet-emitting LEDs? IIRC, one of the --HP-- oscilloscope cameras used a UV emitting lamp to light up the screen's phosphor and show the graticule.
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Brad Thompson <brad.thompson@...>
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#70244
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Photos of a non-illuminated graticule; WAS 576 versus 577
During the discussion of the 576 vs 577 curve tracer I mentioned the 577 graticule was not illuminated which I find annoying every time I want to take a picture of device characteristics on the CRT.
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Dennis Tillman W7pF
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#70243
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Re: Total beginner with newly acquired 475 with issues
Take care when you test power supply.I had repared 4 Tek475. But with the last something wrong occured the K tube filament burned!!!Something I d never explained as I have more than 40 years
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Seedorff Carl <carlseedorff@...>
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#70242
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Aluminum panels wanted
Hi, I am building some 7K plugin kludges and need blank front panels. The 2 1/2"x5" panels with the turned up ends would be my first choice. 2 1/2x4 7/8" flat panels would be my second choice. They
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Jerry Massengale <jmassen418a@...>
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#70241
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Re: Displayed signal becomes compressed when position is moved to the left
Those are not the problem then. I was thinking that if the multiplexing diodes where not switching completely it would cause clipping in analog mode while allowing the readout and digital display to
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David Hess
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#70240
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Re: Displayed signal becomes compressed when position is moved to the left
Yes for Both A and B. Yes the timebase still in calibration for the part which is not compressed. At U7202A/B STORE .72 and 7.2 (this is lower then on schemtic 7.59) /STORE .55 and 7.2 (this is lower
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david_s5y
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#70239
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