The back of this board has a very heavy coating of this solder on it. It is to the point of pooling in some places. I am trying to figure out what kind of metal the solder is. Could it be silver solder? Does anyone know the value of this kind of board?
A little background on the boards themselves.
They are GE Radio signal controllers. They come in a rack very similar to a server rack you commonly see.
I have 150ish of these controllers. They are included with a lot of telecom equipment I made reference to in an earlier post. The controllers have a 20+ pound aluminum heat sink. In the pictures I will show the process of them being dismantled, the whole boards and a couple close-ups.
The front and back of the board
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2)
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4)
Here are some numbers on the board itself
9)
Thank You for any help in grading and identifying the type of metal used on the back of the board.
There were some references to them in an earlier post I had called "big telecom scrapping"
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