Tektronix 2445A is a lovely scope. So is a 465, but given the choice I'd take the 2445A any day.
The 2445/2465 scopes have a custom hybrid inside (U800) which gets real hot, and is a common point of failure. When they go, the only place you can get another one is out of another scope. It's a good precaution to add a heatsink to this IC (plenty of info on this).
The 2445/2465 scopes have a custom hybrid inside (U800) which gets real hot, and is a common point of failure. When they go, the only place you can get another one is out of another scope. It's a good precaution to add a heatsink to this IC (plenty of info on this).
The calibration output on the front is for adjusting probe compensation, nothing else.
If it's been calibrated in the last 10 years and hasn't been thrown from the roof of a mid-size building, it should be spot on. Even if it's a tiny bit out, it's only a CRO with no storage, so who cares.
But it's a great 150MHz scope (that can be modded to the 2465A standard for 400MHz bandwith), 4 channels, cursors etc...
If it's been calibrated in the last 10 years and hasn't been thrown from the roof of a mid-size building, it should be spot on. Even if it's a tiny bit out, it's only a CRO with no storage, so who cares.
But it's a great 150MHz scope (that can be modded to the 2465A standard for 400MHz bandwith), 4 channels, cursors etc...
Ta Mlloyd1.
Found a good link going to condor audio
http://www.condoraudio.com/wp-conte...nix-2465B-Oscilloscope-Restoration-Repair.pdf
2445B but cant imagine there is a great diif between A and B
Thanks all for the help.I'll let ya know when I get it
Smiffy
Found a good link going to condor audio
http://www.condoraudio.com/wp-conte...nix-2465B-Oscilloscope-Restoration-Repair.pdf
2445B but cant imagine there is a great diif between A and B
Thanks all for the help.I'll let ya know when I get it
Smiffy
These are wonderful 'scopes. You will be pleased to own one.
A while ago I found a 2445 in a dustbin. It turned out to have a faulty U800 (horizontal driver). After much waiting, searching and dumpster diving I found a 2445A (I think it was an "A") which had been smashed to pieces, however the U800 chip was present and once transplanted, the 2445 came back to life and is now full working order!
A while ago I found a 2445 in a dustbin. It turned out to have a faulty U800 (horizontal driver). After much waiting, searching and dumpster diving I found a 2445A (I think it was an "A") which had been smashed to pieces, however the U800 chip was present and once transplanted, the 2445 came back to life and is now full working order!
I bought a couple of these a few months ago and so far have been pretty happy with them for my needs:
ebay scope probes
Price is great and quality appears to be OK as well.
I would certainly be interested in hearing feedback from others who have more critical needs than me.
mlloyd1
ebay scope probes
Price is great and quality appears to be OK as well.
I would certainly be interested in hearing feedback from others who have more critical needs than me.
mlloyd1
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