High current interstage transformer (For 300B driving tube).
1+1+1+1 : 2+2
LL1677 is a high current interstage transformer with a 1:2 step up ratio.
The transformer is wound with a special low capacitance winding technique to achieve best high frequency performance. The transformer has a special high flux, low distortion audio C-core of our own production.
For the LL1677, the core air gap is chosen such that the denoted DC current (80mA for a LL1677/80mA) generates a no signal core flux density of 1.2 Tesla when used with all primaries in series. This leaves a flux
ensity swing of 0.4 T for the signal.