17-03-2017, 02:01 AM
I referred back to Lawrence's summary of the Saalburg circuit. The main areas of focus for me at the moment are the two IF's and the EBF89 plus the EABC80. I am literally racking my brains to trace the diodes and, of course, there is the discriminator circuit. I think Lawrence indicated the centre tap between L23 and L24. Anyway maybe it will be understood why I take time out to address textbook theory. Discriminator circuits won't be understood without some grappling with ARRL tutorials.
I haven't fully grasped Lawrence's explanation yet but I will get there. Tomorrow I will print it.
Notice one diode on EBF89 is grounded out and the grid used instead. Likewise the diode on EABC80.
The Foster Seeley discriminator circuit may help me if I locate it.
When I step back and say all the circuit makes sense, then I will go to work more fully.
I haven't fully grasped Lawrence's explanation yet but I will get there. Tomorrow I will print it.
Notice one diode on EBF89 is grounded out and the grid used instead. Likewise the diode on EABC80.
The Foster Seeley discriminator circuit may help me if I locate it.
When I step back and say all the circuit makes sense, then I will go to work more fully.
