8V output in diode test mode.
The diode test range uses a constant current diode (JFET based) to generate 1mA output. It has a 1V to 2V drop. It's connected directly to the battery plus which is why you are seeing 8V open circuit. It will not stay at 8V when loaded. The compliance voltage will also drop as the battery depletes. The diode test is limited to 2Vfs. Even though the 8060 will light most LEDs, if the LED has a Vf of >=2V at 1mA, the 8060 will indicate OL. Most of the older chemistry LEDs are close to 2V at only 1mA. But it will light even a blue/white LED, it just won't show the Vf. It might be an interesting modification to force the 8060 into the 20V range. Then you could do some matching. But I'd also want to provide 10~20mA which is appropriate for all small LEDs.
Thanks for the pic. , the big question is ....... Are there any bodge wires on the bottom side ?.
Surprisingly no!
My lab is all set up for a production line operation for 15 8060s and one 8062.
Would love to see some pics of your production line, Mr. T.
Well, I shouldn't have called it a production line, but the attached picture shows a portion of my workbench where I am reworking the 8060s. Each unit has a dedicated box so I wouldn't mix them up (you can see more boxes stacked on some of my instruments). My Pace MBT100 does the hard work. My glass soaking tray on the right holds 3 8060s at a time. Bottles of pure IPA are seen to the right of the covered tray.
I use one of my functional 8060s seen on the left for continuity testing (the 8060A has one of the the fastest stretched continuity functions) to make sure that any found corrosion has not eaten a trace. I also use the 200nS range to track down leakage.
A pile of pulled caps is sitting there (yeah, I'm messy) but I was thinking about checking to see how the caps would read for value and leakage current and other cap parameters just to educate myself on what exactly a 35 year old cap does. The ones that were definitely leaking electrolyte...I know what they'll measure. I'm more interested in what caps with 35 year old electrolyte measure from a unit that was still functional. The new caps are in the Mouser bags.