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This scan was made possible by Pete Lancashire. https://drive.google.com/open?id=10de6jO2yXNFdVNGAd9MlDKnPdpYoLPI4

hi, Spotted on eBay: Tek 545 with tubes for parts... $100 located in: Crimora, Virginia,

Indeed and almost too easy to fix! It turned out that the coaxial wire going to the ext Z-axis BNC had come adrift. Re-soldered and now z-modulation is functioning, but still no bright-up on "A INTEN"

Just try a Helicoil first, I just fixed some stripped bakelite knobs from a 1920's radio using 4BA Helicoils - worked great! Adrian

Epoxy resin mixed with enough ground silica to make a stiff paste then rammed into the hole Robin

plastic is fairly soft compared to metal, normal thread is 70%, you can use a smaller tap hole to approach 95% thread, use a good sharp tap. plastic threads will hold better and longer with more

He is wanting to replace stripped inserts in knobs, seems like a great application for easily tap-able jb weld. No concern about viscosity in that application. I'm not sure Micromark's bismuth/tin

Hello John, I'm glad you made progress in so little time. On the tekwiki website, down there is a reference material section and a Tektronix semiconductor design catalog. Link is here:

An alternate approach would be to hand machine delrin rod on a drill press.

Warming the JB Weld will decrease the viscosity. I used to pot solid state modules for the side-winder AIM_9H using Hysol epoxy, it was done in a vacum chamber, no voids or bubbles allowed. wrote:

It's a multipage TIFF -- most system previewers (Windows, OS X) can page through it. Sorry, I should have warned about that :-) --Toby elsewhere and will study that.

Micromark has some low-temp casting materials <= 160 degrees F. (Metal) R.

Is the knob large enough to use a 6-32 set screw? If so make sure you use a correct numbered drill with the tap. 73, Blll, WA2DVU Cape Mah

JB weld works well for this. Mike kd5rjz

Just what I was looking for; many thanks.

But old hand at other electronics repair? Excellent - for the most part you don't need a whole lot'o'scope to diagnose another scope. The power supply ripple is typically measured under the 20MHz

Greetings, I'm trying to save a couple old plastic knobs that have stripped set screw threads, that don't have brass inserts. I remember reading someplace about a machinable potting material that is

If you feel like doing a lot of work, you can look up the part number and cross-reference it to find what else it is used in. Some Tek parts are common and some are made out of unatatium, hope I

A good start would be to have the controls thus: POWER Off INTEN Fully ccw FOCUS Midrange SCALE ILLUM As desired VERT MODE Ch 1 POSITION Midrange VOLTS/DIV 5V VAR VOLTS/DIV Calibrated detent AC-GND-DC

I have a feeling that it depends on whether or not it is in storage mode at startup. With storage mode turned off, IIRC, any storage scope ought to look "normal". In storage mode, then you'll get a