09-18-2023, 06:00 PM
Back from the shed!
Just a thought -can we assume that the wave change switch as shown in the schematic is in the "broadcast " position ? If this is so with a single wire antenna on "A" and "Z" grounded to "G" the signal will go through the primary of coil#1 and thence to earth.
If my reading of the switch wafers and positions is correct, with the switch in the "broadcast" position the primary of coil#2 is floating ,earthed through R16 (1k ohms )but not connected in any other way to any other part of the circuit.
So "broadcast " signals only reach the grid of the 6A8 through the gimmick ,the primary of coil 2 being not connected to any signal path.
Have I read this correctly?
The reason I ask is because I have concluded that the wave change switch is damaged, as mentioned in a previous post, and that is not making sorting this front end any easier.Thanks everyone.
Just a thought -can we assume that the wave change switch as shown in the schematic is in the "broadcast " position ? If this is so with a single wire antenna on "A" and "Z" grounded to "G" the signal will go through the primary of coil#1 and thence to earth.
If my reading of the switch wafers and positions is correct, with the switch in the "broadcast" position the primary of coil#2 is floating ,earthed through R16 (1k ohms )but not connected in any other way to any other part of the circuit.
So "broadcast " signals only reach the grid of the 6A8 through the gimmick ,the primary of coil 2 being not connected to any signal path.
Have I read this correctly?
The reason I ask is because I have concluded that the wave change switch is damaged, as mentioned in a previous post, and that is not making sorting this front end any easier.Thanks everyone.
