Got tek 2235A edit: good condition. May explode knowing my luck. Will thoroughly inspect it and test it first.
I know someone that is disappointed if his "hunter-gatherer finds" work, because that means he misses out on repairing them
Edit: also got an HP attenuators switch box. Don’t need it but it has a full complement of feet and was only £2
Drat. I'd have nabbed that since I have a remote HP attenuator that needs such things. But then it also needs a cable with those connectors and I'd prefer to flog the attenuator - so (perhaps) I'm glad I didn't see it
In other news, I picked up my 5th Tek portable TDR for more than I wanted to pay; I seem have a fetish for them. This was my first 1502
B, my previous ones being plain old 1502s. I knew this would be a gamble, because they have notoriously grotty LCDs. So I plugged it and yes, the display showed all the faults seen elsewhere. Bugger.
I came back to it a couple of days later, ripped it apart, twiddled the
internal contrast pot, and saw a trace. Good trace, still bloody awful LCD: couldn't reliable see the cursor. Followed the service manual's LCD setup procedure, without much luck.
Came back lated and tweaked it in a
different way, and bingo - winner winner chicken dinner. But that brings the next problems: do I want to replace the 9mm thick flat lithium thionyl chloride battery that stores the front-panel's config, and can I force myself to sell it?
There are quite a few on fleabay, mostly broken, one claimed working for $1000 but without a picture showing it working - but the same vendor sold another for $200 so
perhaps it is working. So, why would it be worth $1000? I hear they are specified for some aerospace tests, and aerospace is notoriously conservative when it comes to test procedures. There is also a company making new replacements for 1502Bs.
Anyway, a pic is in order. The UUT is a 50ohm load on the end of a 3ft cable, with a BNC barrel connector between them. It shows the cable as 50.4ohms, the load as 50.0ohms, and the connector as 52ohms and 28mm long.