Old thread, but work that keeps on giving to the community. Thank you, lowimpedance, for making this available!
I just got a 155 for myself, in what seems like pristine condition - including internal original batteries that still measure in spec (two of them), and nearly in spec (the other two) - and the 1554 power supply in the back.
On a related track, what type of batteries have others been using for this? Just regular alkaline 9V? (which I see in the included pics) Or lithium? It doesn't seem very critical to me, but just curious on others' picks and their reasoning.