True, but Wikipedia trends over time toward correctness. The problem with printed and non-editable Web-based encyclopaedias is that their wrongness is set in stone.

That’s as likely as current US gov’t administration engineered it in an attempt to reduce Chinese foreign competition and it backfired. Ridiculous? No more so than your baseless conspiracy theory. The

I just went through the calibration procedure, or at least most of it, on my 577 because I replaced the faded CRT with a used unit. I don’t know (nor did the previous owner) if it came from another 57

Seems a bit over-the-top, really.

Definitely interested. I bought a 222 to add to my collection, but it’s turned out to be surprisingly useful. I’d like to replace the dud lead-acid battery but the usual replacements involve cutting t

Really? What’s bad about it? The power supply in my 577 seems to be powering it just fine, and has apparently been doing so since it was made.

Armchair Airlines Computer Services Inc. is me! It started out as just Armchair Airlines in the early 1980's, a videogame software company that I co-founded. Perfect name for a videogame company, isn'

Yes, my 577/177 has no pull knobs.

Are you responding to my question about referring to 575/576/577 curve tracers as Danaher rather than Tektronix? If so, I’m sorry, but I can’t make sense of your response. If it’s a reference to “Stin

Sounds good! But once again I must ask: why do you refer to Danaher, which Tektronix isn't now (it's Fortive) and wasn't when the 575/576/577 were made? ... And "Stinkely"?

Sell matched pairs of 6L6’s on eBay with the tag “Matched using Tektronix 570” for bonus (read: marketable) audiophool “authenticity” and “vintage analog" cred.

Why do you call them _Danaher_ 576, 577, etc.? I thought Tek wasn’t acquired by Danaher until 2007. Tek was still under independent ownership at the time the 575, 576, and 577 were made, wasn’t it? If

Thanks for the tips, and I will try the storage calibration when I get a moment. Incidentally, I also have some analog storage Tek scopes — a 549, a 7623, and a 564. The 549 is in excellent condition

It is a used CRT that the previous owner was told was extracted from a working unit, though “working” may or may not have included storage. The previous owner of my 577 didn’t know. And that’s the rea

I have a 577 D1 that came with the original but weak CRT installed and a replacement CRT in a box. Storage mode on the original weak CRT worked well, but the primary trace was almost too dim to see. I

Right click on the link in your browser, pick the option to copy it, and paste it into a new message letting us know where it is. For the file in question, you should get this: https://groups.io/g/Tek

Excellent, thanks! That’s what I'd vaguely remembered.

I just acquired a Telequipment (British subsidiary of Tek in the 60’s/70’s) CT71 curve tracer in excellent working condition and good cosmetic shape, but for a cracked knob. Like the usual Tek knobs,

I’ve got a 222 and as far as I can tell, Self Cal works unconditionally. Just hit Aux Funct and Self Cal.

What were your modifications? BTW, at least the 222 was originally lead-acid gel, not NiCad.