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The 551 is a great scope and was in production for quite some time. There is a 551 power supply on ebay that has been listed for quite some time (I have no connection with the seller and know nothing

Also, don't miss the very relevant article on software reliability starting at page 35... Raymond

Dave These are the ones I supply - X1 440VAC rated - at Mouser. I use Vishay wherever possible - may cost a bit more, but reliability is my first priority. 594-222233810683 The other film caps

Hi Fabio, I think we will all benefit from your adventure into replacing the Tek relays. If you get stuck and cannot find an appropriate substitute at any point contact me off list at dennis at

Gentlemen, I've got 2445a successfully calibrated today! It works fine. In a summary the scope can be calibrated in sessions as Chuck has explained. This is exactly how I did it. One after another

Those are rated at 275VAC. That's not much margin for those running 240V mains. Do you have a recommendation there? Dave Wise

Hello guys, After I got that 7A13 some weeks ago I have been fighting with its inconsistencies as I turn the different range knobs... As anyone who just purchased something, for a couple of weeks I

Chuck, Thanks. I will check them out. Mike N2MS

I have no great fondness for Kemet... I have replaced too many of their DIP style dry slug tantalum capacitors. I replace the RIFA style capacitors with Panasonic ECQ UL X-2 Met Poly capacitors.

I just had this happen to my 2445. It is still working but I want to replace the Rifa caps before I proceed. Can anyone recommend a substitute Kemet film capacitor that I can purchase from Mouser or

I recently acquired a very clean Tek 551 oscilloscope I'd like to restore; but it's missing the separate power supply unit. Anyone have one for sale or know where I might acquire one or is this in the

Yes that's exactly the one I was thinking about. So my memory wasn't so bad after all. /H?kan

Apologies for talking about a non Tek thingie but has anyone got a drawing or a photo with a ruler against for the feet on an HP 1740A - need to make some. Cheers Robin

While trying to figure out what is going on with my 468 I decided to monitor the -8V and 15V supply DC coupled. When the trace starts to jitter there is noise on both of them. Not ripple, it almost

https://www.youtube.com/watch?v=5vN_7NJ4qYA&feature=youtu.be Interesting viewing, this was posted on the Branchtv group website. There seems to be a scope pile near the end of the video. Geoff.

K600-11-56Y25 WINCHESTER ELECTRONICS X600-1156Y25GDF-30NI WINCHESTER ELECTRONICS are listed as alternate suppliers of NSN: 5935-00-599-8548 They made different connectors for various thickness

Hello all. I have a few parts I am looking for if anyone wishes to sell to me (I am in North Carolina) or can advise me the best options. I have a TM504A with a cracked edge card connector. It says

Digital computers were being programmed before Tektronix even was founded. And, for more than 40 years before tektronix did much with them. Their early computer endeavors used late

On Sun, Oct 14, 2018 at 12:05 PM, Dennis Tillman W7PF wrote: > > Hi H?kan, > I have never come across the 067-0883-99 Universal Load Unit before now. There > was only one hit on google but that had

There is nothing wrong in coding in ASM or mixing the ASM and C. Sometimes the code structure is well defined and you see immediately that everyone using the same calling conventiones between the