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Hello all: Seeking a cross ref of all Tektronix lamps TEK part # like 150-0090-00 spec volts, current, envelope instrument used in, industry lamp type # Would be very handy! If it does not exist

The Grayhill 71BDF30-20-2-AJN multi-way switch(Digikey GH7108-ND) is out of stock at Digikey ? Mouser has a few (16) and lead time is 16 weeks. Master Electronics, Electrosonic, and Verical also

HP did in fact resistor color code to identify some ribbon codes per the sockets, but more prominently used them to mark the small jumper cable (SMB, SMC, and some SMA cables inside the units ( ie.

Interesting...however, since my last message, I discovered three blitzed transistors in the vertical amp, Q388, Q394 and Q494. Those all could have gotten damaged by the 75V going way too high. Sean

Sean, I have not worked on a 453, but the symptoms you mention have appeared in various 465 475 and 485 scopes that I have repaired. A majority of these had issues with the beam finder switches or

I forgot to add, any signal gets squished down when moved to the extremes as well.

So this evening I am attempting to run through the cal procedure. In attempt to document this repair to help anyone else who might be working on one, I have identified three things which aren't

Good point, I forgot your 1S1 is already 50 ohms. What is the period of that ringing? That may help locate something that's the right electrical length. Track on the probe PC board maybe? I agree, no

[email protected]> wrote: The problem is that it appears the stator is wound around the rotor, encapsulating the bearings within the stator. Matt D'Asaro wrote an article on how to replace the

That's good to know- I don't think I've heard that before. -Dave

McMaster Carr has 946 different sizes of Oil-Embedded Sleeve Bearings. One might fit with minor adjustments.

At least in the old days (500 series), if the wire is carrying a supply rail, it's color-coded with an approximation of the voltage. Examples: -150V is black with brown and green stripes; +225 is

Never tried. I might still do that, motors still in a box, I think. Thanks for the suggestion! Raymond

I didn't use the 50 ohm terminator when plugging directly into the 1S1 because I thought that would be too much load, since the 1S1 already provides 50 ohms of load. However, I tried to replicate the

If it is a bush bearing, is it not possible to turn one out using phosphor bronze? If you are near a machine shop, it might be an idea to show them and see how much they would charge.

I finally realized a couple months ago that the colors on multicolored ribbon cable actually meant something other than just identifying separate wires. Standard resistor color code, duh. Start with

I agree with Michael. I always looked at the striping as just a means of identifying a wire from one end of a cable to the other and hadn't thought about the color codes indicating a pin number, etc.

Raymond, When I read your comments, such as above, I realize just how little I actually know. Thank you for sharing your knowledge with us. I will never look at those wires and stripes the same way,

That's a lot of ringing (and it persists for a long time, too)! For the "direct" test, did you also have the tee with the 50 ohm terminator attached? (Is the ringing from the probe itself or from the

Correction: The background color is not *printed*, so a straight white wire would indicate pin 9. Tek avoided this by not using pin 9 on the 465's CRT -;). Raymond