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Hello, these people might be useful: www.krystaly.cz/en/Products/Crystals No affilation. But I speak a few words of Slovak and are in the region...so if I can help, I will in the frame of my

One thing my engineer buddy did in the lab we used was to look at the “speed of light”. He took a reel of coax we had gotten to run some Ethernet links. This was before twisted pair took over from

Larry, I think this approach makes sense. It will not be the “cheap” way to make this happen, but it will likely produce the best results. As I had already stated, I would be up to helping out

Thanks Tom, yes the difficulty to find these crystals is high, but Jim has one and hopefully I can have it. -- Cheers Attilio

Wow Jim, I am in Italy, if you give me your bank details and the amount I have to pay for the crystal and the shipping costs, I will make you an international bank transfer. Thanks -- Cheers Attilio

Hi Jared, Very nice implementation of this Power Supply Tester. Hat off. By the way around April this year a nice 067-1201-99 was sold for USD 148.95 (BIN and eBay) and its TM5000 counterpart

LOL, I think you mean "wiper", not "viper"!? A viper is a kind of poisonous snake!? Such is the confused but fascinating mess that is the English language.? ?Jim Ford?Sent from my Verizon,

Happy new year guys! C 1374 is a possible culprit. You can always replace it and give it a try. If not, you could solder a couple of leads to the viper and the 50 volt ends of the pot and bring them

If you don't find a used one, they are still available from Tek @ about $35.

My 561 has a bad HV XFMR, will cryo tubes and special audio cables fix that?

R1375 is deep under the HV shield, but that's hardly my issue (I've been operating the scope without an HV shield for weeks). The real problem is that the grid bias pot is snuggled up close to what I

You sure that wasn't a 570 Characteristic Curve Tracer Dude, I'm thinkin' it's seriously -in- cal' .... Bill

Ok, heads up, time to go re-download the files if you already downloaded them. I found one transistor backwards (So test 1 wasn't working right), this has been rectified and the unit is now 100%

Thank you for the project. But, I don't get it? I know there is a TekWiki page for this thing... but, was this ever produced and sold by Tektronix? (It seems like something they might have used in

No, apparently, the nanosecond is out of favor this year (as of about 42 minutes ago) and the arcsecond is in. Go figure. DaveD

Trying to find R1375 & associated components on your earlier pictures, but I think from looking at my 465 that they're just out of frame. Also using my 465 as proxy, it looks like the zener diode and

Non-working TM500 modules appear on eBay from time to time at fair price and include top,? bottom and side panels and the all-important latch-release pull-tab. Shielding is not important for this

In my experience, the 3D printed plastic frame needs a thin gauge aluminum backing to give it rigidity.? If you had any machine shop capability (such as a decent drill press), you could make your own

Wow.. I just checked my 40 + year stash of normally useless crystals, and found 52.500000 CR-55A/U. Probably a 3d OT, but the spec should tell. HC-18 with the hard pins, not flying leads. Yours for

Does anybody now if the aluminum plates are required? Would plastic plates (3D printed or otherwise fabricated) work just as well? My stable of TM500 modules is already pretty thin, and I don't have