Terry's Tek 465

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Terry's Tek 465

morzh
Odobenus rosmarus

Posts: 16,507
Threads: 572
Joined: Oct 2011
City: Jackson State, Province, Country: NJ

05-15-2017, 10:24 PM

Terry just couldn't stand the thought of me leaving without anything to repair so he made me take his Tektronix 465 scope to look at.

Once powered, it looked like the H-sweep amp malfunctions: I can see the flickering but cannot find the beam.
Sure'nuff, once I started to look at the H-output amp, I found a bad 2N2222A transistor. The Emitter junction is open. Q1274 namely, if someone wants to bother looking.

Another thing, the 110V power to the output seems to be 150V. Wonder why.

Anywhoo, Terry, if you have 2N2222A little buggers, get me some by mail.

People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.

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Terry's Tek 465 - by morzh - 05-15-2017, 10:24 PM

RE: Terry's Tek 465 - by Radioroslyn - 05-15-2017, 11:20 PM

RE: Terry's Tek 465 - by morzh - 05-16-2017, 08:01 AM

RE: Terry's Tek 465 - by morzh - 05-16-2017, 10:34 PM

RE: Terry's Tek 465 - by Radioroslyn - 05-16-2017, 11:19 PM

RE: Terry's Tek 465 - by morzh - 05-16-2017, 11:24 PM

RE: Terry's Tek 465 - by Eliot Ness - 05-17-2017, 08:11 AM

RE: Terry's Tek 465 - by morzh - 05-17-2017, 08:26 AM

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