I haven’t found that much information about the Agilent 6811B AC Power Source/Anaylzer. So I thought: Why not post a few pictures a made during troubleshooting of a problem where the display stayed mostly dark (except for the shift key indicator if I remember correctly, which likely is processed locally somewhere on the front panel board. The issue went away shortly after opening the unit, so for now I couldn’t reproduce it). ...
The Technics SU-VX 700 is an integrated audio amplifier from the early nineties. It delivers 2x 90W into 8 Ohms and is specified with a THD of 0.007% (20Hz .. 20kHz, rated power). In my opinion it is one of the better Technics amplifiers. Whereas the sound of an amp is always subjective to a large degree there are some design aspects that are a bit more objective. What I particularly like about the SU-VX 700 is mostly related to its simplicity and repairability: ...
In order to be able to look at schematics etc. during repair and soldering sessions I recommissioned my old monitor months ago and connected it to my main PC that sits on a seperate bench. That solution kind of worked, but going back and forth between different monitors on different benches was a bit impractical. Also, I wanted to connect all my remotely controllable instruments to a separate computer - until now, I used an old ThinkPad for that. ...
The HP/Agilent 6632B is a remarkable power supply. There are some similarities with the mobile communication DC source 66309D I “repaired” recently: The 6632B is optimized for a fast transient response and it has a low current range too. But the circuit and its properties differ significantly. One important aspect: Where the 66309D only has a downprogrammer that doesn’t track the current setpoint, the 6632B goes all-in: It’s a two-quadrant power supply - able to source and sink current over the full operating range from 0-20V at 0-5A in CV and CC mode. ...
I recently got my hands on a HP 6060B System DC Electronic Load (later also sold as Agilent 6060B). My unit has option 020 installed: Comically large binding posts also on the front panel. This option certainly is not unheard of, but not too common either. Retrofitting is possible, but can be quite some work. Huge binding post also on the front panel thanks to option 020 ...