I have a 7704A that was damaged in a house fire. The scope was in a closet upstairs and everything outside of the closet was either melted or burned. There is significant smoke residue on the

Depending on the devices placed below the shelf holding the 2445, it even might be worse to have holes. The holes in the bottom of the scope are there to let in air at ambient temperature, so if

That’s it - (567/6R1)! I missed the previous mention. Thanks very much. Regards, Ken

Hi Keith, After that cap smoked, the scope worked okay with the blown cap in it. I did replace both line caps along with the electrolytics. Hopefully it's cured for as long as I'll be using

RIFA Caps -- Michael Lynch Dardanelle, AR

When my delayed action smoke generator fired, it destroyed a series resistor, a 1cm diameter patch of prepreg, and deposited pots of carbon on the PCB and the exhaust fan. At the very least you

Mentioned earlier in this thread, it’s probably a 6R1 plugin for the 567 oscilloscope. In other words, one of these? https://w140.com/tekwiki/wiki/6R1 In one of these?

The 567/6R1 combo previously mentioned? https://w140.com/tekwiki/wiki/567 David

As long as the scope has its 4 bottom legs intact and the bottom of the scope is separated by that amount from the shelf I'd say its enough. I use my 2465B sitting on top of my 2247A and the exhaust

Hi Barry, Curiously, my 2445b just blew the same part. unlike you, I got the smoke and the magnificent sonics and everything. Did you replace yours? My scope seems to be working fine without it, but

Greetings, I can’t prove it even looking back at my really old Tektronix catalogs - but, when I was in HS back in the late 1960’s a professor at the local college, what was then the Cragmor

Thanks Jose, Yes, that's the one I was worrying about. I'm going to cut the holes and add a small fan too. Curiously, I just put the 2445b up on the finished shelf and fired it up. (no holes yet) A

Yes - proving the authenticity of “NASA” property tags can be a challenge given the wide availability of printers that can print on foil tags. However, compared to tags printed using conventional

Then this RM504 is an exception to the rule. By the way... how does one verify the authenticity of the "Blue and silver sticker" on the front? -- Roy Thistle

Hi Keith The failure prone U800 IC is underneath, I remember that its failure is heat related. Make sure it is well taken care of. I did put a small 20mm fan inside the case to blow some air on

Not really a scope but almost. I am looking for a XY display with storage tube. Tek 603 or perhaps 611. Anyone that has one to sell?

Cursor voltage measurement on a Tek scope would have been possible in 1974, certainly. With a 7D12/M2 plugin the timebase delay settings can be used to highlight a portion of trace for voltage

Fun reading! I noticed that a permanent AC line cord was added. That custom modification must be commanding the high reserve.

I doubt it will hit reserve unless someone has no idea what this scope is worth. Unless I am wrong and the group really thinks it is worth that much. It does appear to be in nice physical

"Commonly referred to as O-scopes"  Really, by who?  I don't think I've ever heard anyone call them "o-scopes".  At least not here in the valley.  Maybe that's what they call them at