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I'm still quite a way from a successful wind and the only transformers for which I have winding data are the 545B/546/547, 549 and 556. Watch this space! Morris

TekWIki says that the 2440 is 300MHz (analog bandwidth) with 500 MSa/s (digital sampling rate). It doesn't say what the single shot bandwidth is, but it has to be less than 250 MHz just based on

Hello Morris, I’d also like some “restoration” bits of that unit is (unfortunately) going to get scrapped. I’d be happy to contribute to the postage if the chosen bits could be bulk shipped.

Which 500 series scope? I need HV transformers for my Curve Tracers.

Hi all, It's been a few years since I last disassembled a 500 series HV transformer core. It's a ferrite double "E" with a small air gap in the middle leg and the two outer legs glued together. I seem

If you're parting it out and don't mind posting stuff to Australia i wouldn't mind a few bits. I'd like the HV transformer and the "Graham Cracker" non inductive resistors from the final stage of the

Do any of you own an 1180xx/CSA803x? It takes 3 V to blow a sampling head! I paid Tektronix (chipxs) $250 for my SD-24 and $750 for my SD-32 prototype. The SD-32 is labeled SD-30 and was listed by Tek

I thought the published spec on the 2440 was 200Mhz, 300Mhz in repet mode. Was this in repet mode? Jeff

I have a TLA704 anlyser which I've repaired and upgraded, but it's missing the front cover and accessory pouch; has anyone got either of these they can ship to the UK? The part numbers are: Accessory

to bad I live in Wi.

Hi Dave, As far as I can see the way how R90 functions is not described at all in the manual. The (I would say disturbing) leakage by Q90 (and possibly also by some reverse biased diode) ill have been

Another thing about wills -- in Texas at least, they are good for four years, then need an update.

So, no interest expressed in the Type 531 scope....will probably drag it to the salvage yard. Hate to see it go, would have loved to see it help other similar scopes restored, but I have no use for

Hi Ram. I should have updated that project long ago, but didn't have time to work on it. I'm really glad that you succeeded in making a functional extender. Maybe when I'm back on that project, I'll

Well... and from a multi-year reading of posts on groups.io, EEVblog, et. al. ... I reckon the above situation is significantly because some buyers have p'd off vendors (both the clueless and clued)

Thanks for the insights Albert. Makes a lot more sense than just a design that relies on just leakage alone. In the "T.D. Bias Current" portion of the SM Circuit Description it describes: "Q74 reverse

Everybody should inventory their stuff. Remember that Excel allows pasting photos into spreadsheets, so you can (and SHOULD) include at least one photo that identifies each significant piece. My

Yes - I know these folks and have followed their amazing story on YouTube. In fact, I was contacted by the fellow who owned the computer. He knew what it was (it has the tag on it) but from previous

My wife has suggested that I photograph & do a data listing of important or rarer items with some history etc as appropriate. Recently I started using a Password manager that has a neat "Legacy"

I have been looking for a situation where in situ testing is not that easy. In the 3T77 trigger pulse TD D42 has anode to GND via a T42 winding, and the cathode via 5.1 ohms R41. Just a slightly