1974 Brain Box saves the day.
@pishta
You were talking about the ground leg for the transistors and or the brain board on the control modules.
Here is a tab that has soldered wires to the brain board, also has a step in the fastening end that holds up the TO220 transistor firmly in place.
The fastening end of that tab bolts on inside to one of the small screws that hold on the empty "Top Hat" transistor housing.
So yes this supplies ground to the main board and is mechanically fastened to the case.
That internal TO220 resistor is fastened better than i first thought, but still insulated from the case with the thermal insulation tape.
Anyhow the TO220 is being mechanically held up into the thermal insulating compound and thinking this is as about as good as it gets for the heat transfer to the outside.
So looking at improving the external heat sinks with more surface area. And also build one step up bracket for the back mount out of aluminum stock, so the back can breath and transfer heat into the aluminum stepup bracket at the same time.
Heat Sinks both top and bottom pulling the heat out of the unt before it gets to be a problem.
@pishta
You were talking about the ground leg for the transistors and or the brain board on the control modules.
Here is a tab that has soldered wires to the brain board, also has a step in the fastening end that holds up the TO220 transistor firmly in place.
The fastening end of that tab bolts on inside to one of the small screws that hold on the empty "Top Hat" transistor housing.
So yes this supplies ground to the main board and is mechanically fastened to the case.
That internal TO220 resistor is fastened better than i first thought, but still insulated from the case with the thermal insulation tape.
Anyhow the TO220 is being mechanically held up into the thermal insulating compound and thinking this is as about as good as it gets for the heat transfer to the outside.
So looking at improving the external heat sinks with more surface area. And also build one step up bracket for the back mount out of aluminum stock, so the back can breath and transfer heat into the aluminum stepup bracket at the same time.
Heat Sinks both top and bottom pulling the heat out of the unt before it gets to be a problem.
