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Re: Adam R. Maxwell Wow, I didn't know such a 3D model existed for those! My school has a cheap 3D printer so I can use that to print it. If I'm happy with how the new 3D printed version works, I

I have always hated those suckers. I've broken far more than I've saved over the years. I think in the later years a new design was adopted that could be taken apart and put back together. Probably

Barry Breaux just posted photos of a sectioned pull tab, and it looks like you might be out of luck even if you can drill that dowel out, unless the hooks spring back. Reminds me of a fox-wedged

Yes, it appears they glued this particular one. Even when I put my entire body weight on the pin, it wouldn't budge. Any recommendations in this scenario? -Benjamin

You can try Artekmanuals.com! They have an extensive library of Tektronix manuals https://artekmanuals.com/manuals/tektronix-manuals/ They are reasonably priced and they get them to you usually

From what I've seen of the older tabs, you need to press out the pin in the tab.? That should allow the forks in the shaft to the tab to be compressed, or at least moved.? I'd suggest moving the tab

Hi, I was wondering how to remove the older style pull-tabs on the TM500 series plug-ins. These use just a piece of plastic bending, unlike 7000 series plug-ins. Hopefully, they can be removed in a

Thank you. I have a copy of the troubleshooting guide and went through it partially before switching to the ‘failed’ assessment of the power supplies (see oopsy). I need to finish reading it.

I don't know how you're probing those nodes, but I suspect the ringing you see is measuring error. It is tricky to get good CMRR in those kind of measurements. Try looking at one of the low voltage

my apologies; you are correct. Mike Dinolfo

It appears that there is saturation and ringing on my transistors. https://ibb.co/sKgnCct Here is a plot of the base and emitter of my transistors. The yellow trace is the current through the emitter

I could be interesting in doing a pickup if there is enough to make the trip worth it. The lab is reasonably close to Madison WI Zen

The subject line of this thread says "near Madison, WI, USA." -- Dale H. Cook, GR/HP/Tek Collector, Roanoke/Lynchburg, VA https://plymouthcolony.net/starcity/radios/

Dave, Thanks for your feedback! I just received input from sicco on the eevBlog forum that what I am seeing is correct as the CLKOUT never changes from the 25mhz and the 50mhz speed-up only applies

Actually, it looks like my question is invalid as the 7904 appears to not use such a Hi-Med-Lo switch. This makes sense though as the 7904 uses a switching power supply.

Jim: I might be interested in the 453; but can you first clarify what "your area" is, geographically? Mike N4MWP

Thanks for the detailed update and I'm so happy to hear good news. So many times, these kind of situations go the other way. Cheers, Tom

Hey Don, Great first post, I'm sure you'll get the old girl up to snuff in no time. Oscilloscopes are kind of unique in that it's often possible to diagnose problems to a functional block by

@Don, Fair enough. I am probably in the minority here when it comes to cap replacement. It doesn't make for a good preventative maintenance practice IMO. Because you really don't know how long

As am I! larry