Update on the Solartron 7150 meters.
Ran some extensive tests on their calibration and I'm pleased to say that are both within acceptable limits of calibration, one will need a re-cal soon I think and the good news is that I could do it myself via the front push buttons, just like the HP3468A and 3478A meters so that's an advantage.
The other issues with both meters, apart from the dodgy filter units, now replaced, was the LCD displays could be difficult to read in some light conditions. The display did have some yellow inefficient LEDs and they could only be seen in the middle of the night with the lights off, (the camera actually made these appear far better then they were in reality), not a good idea to work with no lights
.
The solution was to replace these LEds with some ultra bright white ones and after a struggle these are now installed and the meters have been transformed completely now as these photos show. Overall was it a wise move to purchase these unseen from an online auction, I would say a resounding yes to that and unlike the Solartron 7045 meter I got off ebay last year, these two have far better plastics used in the construction of their cases.