Balanced Input board

balancedinput3 which is the 2n4401/2n4403 transistors which are faster, but only 40v, so only +/-20v supply

balancedinput4 which is bc546/bc556  which is +/-30v

balancedinput4m  is a 4 layer board with the +30 and -30 on the inside 2 layers
Schematic