Well, I finally came across a Hoffman 706 with a non-functioning solar array.
This one is a TP706, and although it looks good, it's a basket case.
First off, the speaker cone is water damaged. The radio doesn't appear to have been in a flood, so my guess is it was probably left under a sprinkler at some point in its life. Second, the solar array didn't have any output. This is one of the early 706's with the rectangular solar chips that are soldered together in an overlapping fashion like shingles. I cut the adhesive away from the bottom panel to remove it and found that the foam that held the array against the top of its enclosure had completely deteriorated to mush, allowing the array to move around and break into 4 pieces. The other issue can be seen if you look closely at the area where the negative wire is taped to the back of the array. Apparently the adhesive of the tape, in conjunction with the deteriorating foam, caused the insulation of the wire to completely break down. The wire is shorted to the back of panel.
This solar array is extremely fragile! It's going to be a challenge to solder it back together!
