You may remember that I recently asked you a simple question: ‘Why is there any “soldering” at the bottom of the “1” shaped pad of PT/35(b)?’
Several readers have suggested an explanation but quite frankly none works. (I think we all agree on that.)
Again, look at the “Lead/Tin soldering” deposited at the bottom of the two following pictures.
And now look at how the relay is mounted on the main board of the MST-13 Timer! No soldering at the bottom of the pad is needed.
Please, REMEMBER that there is no evidence that this “soldering” was present on the early pictures of PT/35(b)…
I can only think of one explanation. And it is not an “innocent” one. But, as always, I will let you come to your own conclusions for now.