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> Tektronix 2445B oscilloscope 4CHAN 150MHZ+cal+guaranty
Tektronix 2445B oscilloscope 4CHAN 150MHZ+cal+guaranty
The Tek e 2445B is the successor of the very popular 2445 and 2445A portable analog scopes. Tek made it around 1989, and it cost over $4500 new, but you can now get it for just a tiny fraction, still working just fine. Photo shows the fast rising edge of a 1V 1MHz square wave magnified at the scope's fastest sweep speed of 1nS/cm with the cursers indicating about 1.6nS risetime. This is a far more stringent test than looking at an audio frequency signal.
