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Jeff, Here are the Mouser numbers for the filters from the top of the schematic to the bottom in the power supply: 871-B41505A9687M000, 80-ALC40A222DC100, 871-B41505A7688M000, 647-UHE1C682MHD and

Thanks, David. I was pretty sure I understood it but wanted to make sure. Thanks, Barry - N4BUQ

Thanks guys, it's past midnight now here in Spain, but will look into it tomorrow. Leo

Add option 25 tip 206-0393-00. Jeff -- Jeffeelcr

Both the color of the tip and the tail matter. See here for an overview of tip colors for the various probes: https://www.tek.com/en/accessories/oscilloscope-probes/replacement-parts Tip clear, tail

Thanks! These are the manuals from the Tektronix wiki. I've had a color printer still in the box for a couple months, I guess it might be time to set it up! Thanks for the comments! Tim

Datasheet for an 011-061 or 011-0061-00 (75 ohm 10X 0.5W attenuator) or more specs? Instruction Manual 070-1024-00 for Return Loss Bridge 015-0149-00? -- Jeffeelcr

P6133 has 3 different tips depending on cable length 1.3m, 2m, 3m, part # 's 206-0265-10/12/11 P6137 tip is 206-0378-00. Jeff

Hi all, I need some help to identify these probe tip parts, and more important, to identify the probe type they belong to. I am organizing my probes, and also checking calibration on them, but now I

Hopefully he will show up at the Rickreall Hamfest this coming Saturday, where he run a table frequently over the years.

replies interleaved: Happens lots. Hamfest stuff could be very good, or not. If you have a reasonably scanned copy, Tektronix generally showed you waveforms and voltage levels within the schematic

It appears my thread was inappropiately hijacked but I'm still here. I slipped the cover off the DM44 yesterday and now the issue has entered muddy waters. Someone else has been in there with a solder

Sorry - I made another mistake. This line: "As examples (applies to either + or - LEVEL):" Should have been: "As examples (applies to either + or - SLOPE):" Thanks, Barry - N4BUQ

With the timebase MODE set to NORM, is it the expected behavior that the SLOPE control corresponds to the full-scale (8 divisions) on the CRT? As examples (applies to either + or - LEVEL): If an

Thanks Tom, As mentioned in a previous post the deflection plate voltages and waveforms are all as they should be so I'm now sure that the problem is the CRT. My other 7904 had a completely dead power

Bonjour, Finally seeing the 7904 (NOT 465!) photos just uploaded, its not magnetic as the distortion is only in the upper half. The magnetic field would not be so abruptly defined. If the scope was

Jeff, Looking at the schematic it looks like your unregulated values are not that far off: C4439 + terminal, +110v unreg = 150.6 Collector of Q4301, +55v unreg = 70.5 Collector of Q4401, +15v unreg =

Let's say that you have a bridge rectifier feeding a regulator directly, and the filter capacitors are open. Whenever the input voltage rises sufficiently for the regulator to work, the regulator

I’m starting a new topic about the same 465B that I mentioned in Morris Odell’s topic about his 7904 with interesting CRT distortion, because there is more wrong with my scope and I don’t want

Hi Jeff, Those sure are, er, interesting distortions! When you get a chance, measure the voltages on the plates (as in, observe them with a scope). If the plate drives don’t match the displayed