300B Mono Amplifiers Landscape Style - Part 1 - Hi! So far all 300B amps I built were mainly in portrait chassis as seen here and here or in tower style. Now I have a set of 300B monos in the work in th...
Saturday, October 29, 2016
The 4 deck 47position Elma switch mounts directly to the board and the wiper contacts are the silver of the board. I have already run some boards through 20,000 switch rotation cycles without any issues so I am confident in the longevity of the units.
The silver boards are very time consuming to produce and will be reserved for the silver wound units. For the more pedestrian copper wound units I am getting quotes for the hard gold boards per Elma's spec and will have them in the very near future.