I was lucky to buy a Dynaco ST-70. In my country you won't find these ST-70 a lot. You also have to be lucky with the state it is in. Also the power transformer has to be suitable for 230VAC.
This is the amplifier:
I could see that this amplifier was modified, but the chassis, the transformers and the cover looked very good! My goal is to bring this amplifier back to the original state, so the modifications didn't bother me a lot.
When I looked at the bottom I was a little bit surprised what I saw. In this state I thought it was not a good idea to connect it to the grid so I started to disassemble the components. With a vacuum de-soldering tool (Weller) I removed a lot of solder.
I have removed everything right now to clean the chassis. Here is a picture where everything wasn't removed yet.
My first question is about the chassis. On some parts on the chassis I see very small 'cracks'. With a magnifying-glass it looks as if a worm is busy just beneath the surface. Does this mean that there is a layer of lacquer on the metal? How did Dynaco deliver their chassis? Only polished steel or with a layer?