Monthly Archives: September 2013

Mounting the board

Since I am using my own board design I will have to drill custom holes in the chassis for mounting. I am using stainless steel stand offs as opposed to the standard steel so that nothing rusts. I use Loctite thread locker to keep any screws or bolts from backing out. I also have the power tube sockets bolted in using Nyloc nuts, again so nothing comes loose. It’s got to be heavy duty.

Yet more design changes

I decided to move the two 68k grid resistors I had mounted on the board right to the pins of the tube socket. This will help reduce unwanted noise by keeping a longer portion of the cable shielded according to a thread on the Metroamp site. I chopped off two rows of the perf board and now it will fit more easily into the chassis.

New circuit board drawing after removing the grid resistors.

New circuit board drawing after removing the grid resistors.

Chopped off two rows

Chopped off two rows