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You don't want no stinking clock! You want to play tennis on your oscilloscope! https://www.ebay.com/itm/Tektronix-Logo-and-Wizard-Demo-Generator-for-Oscilloscope-with-Table-Tennis/113273075073 Dave

Hope you'll get your clock, John. I doubt whether it'll be this one though, but others seem available. Good luck! Raymond

There is an adjustment on the mainboard that "centers" the horizontal display.? It may also effect the readout, moving everything as a whole.? These are usually adjusted during calibration.? It

Thank you Raymond... I did try emailing the dutchtronix email address but didn't see the southhollandtrading.com site. Looks like the same guy. I sent an email to that address, as well, and will try

Some scopes have a lower bandwidth 1 meghohm input impedance, with a 10 megohm probe they're fine as a 10:1 divider. With a direct 1:1 probe, they're also fine, but voltage limited by the ratings of

Hey David, if you look at H?kan's site <http://www.hakanh.com/dl/kits.htm>, you'll find schematics for the TDS544A, which is probably the nearest you'll get. I also happen to know that the Tek

Has anyone found a source of these, in electronic format would be best ?? I have all the rest of the documentation but the service manual doesn't contain any schematics :-( TIA Dave

I have this nice tektronix 2445. It works quite well, but it has one small annoyance. The trace doesn't go to left edge, regardless of setting of position knob. https://i.imgur.com/mw1Vy5G.jpg Is this

Hi Arnold, Hope this gets to you. This is not the schematic, however it is the service manual [very slim version]. From the picture, you have ONLY one 50 ohm resistor in series with the INPUT; that

John, Have you tried mailing jdr@... (apparently, yes) or andyr@...? The southhollandtrading.com website shows a phone number: (503) 410-9850. I have one of their

Hi Albert, Yes indeed, it seems the 50 ohm is always in series with the 1M input. But I also think the 75 and 50 ohm impedance corrections are just set in parallel with the 1Mohm input directly on the

Yes, but that still doesn't mean I can order from there, nor does it mean it ships to the US. Mostly I was curious if anyone here was familiar with the dutchtronix guy and knew about those kits or

Thanks Dennis. I found that site earlier too but it's no longer available. john ________________________________ Sent: Wednesday, November 28, 2018 3:56 PM To: [email protected] Subject: Re:

Hi John, You might try this site https://www.franktechniek.nl/Kits/oscilloscopeclock/oscilloscopeclock.htm Dennis Tillman W7PF

Hi Arnold, At a Dutch forum you mentioned an important finding I think. With "open" 50R resistor and scope set at 1M, 75R and 50R respectively, the DC input resistance appeared to be Infinity, 75R and

Hi Jack, Thanks for your reply! I think you mean a circuit outside the scope here? This can help to protect the scope indeed. I wished I had that on the scope before it was damaged ;-) But I want to

HI Google's Internet translator makes translation easy. -- Jack

Hi...a probe box network of caps and diodes in series with the probe can do it....the strings of caps and diodes have to cover the possible voltages (might be say 2kV for example). -- Jack

Apologies, typo. Bernie !! rick

hi Bob, Yes, thank you, I saw that link. My mainframe arrived without the SG503. r