19-04-2017, 12:30 AM
"The EBF89's diodes were sometimes configured as a detector diode and separate AGC diode, but as you've observed that's not the case in this receiver because just one diode provides both AM detection and the AGC voltage, that now makes the 3rd diode in the EABC80 redundant,"
I thought I would throw that back up as I've been examining this 10.7 Meg and 455 KC circuit (in prepaaration for intervention). I am so busy doing my boat restoration that all my radio work is now limited to theory late at night.
Strangely I forgot my modulation index work so had to revise it from zero. I also had to learn logarithims due to decibels creeping in.
Anyway, this EABC80 circuit had me busy. Look how the cathode is in circuit with L24 (ratio circuit) I spent a good deal of time checking out grid resistances and bias as well as the variometer circuit.
By day, laying out wall tiles is aa bit more down-to-earth.
I thought I would throw that back up as I've been examining this 10.7 Meg and 455 KC circuit (in prepaaration for intervention). I am so busy doing my boat restoration that all my radio work is now limited to theory late at night.
Strangely I forgot my modulation index work so had to revise it from zero. I also had to learn logarithims due to decibels creeping in.
Anyway, this EABC80 circuit had me busy. Look how the cathode is in circuit with L24 (ratio circuit) I spent a good deal of time checking out grid resistances and bias as well as the variometer circuit.
By day, laying out wall tiles is aa bit more down-to-earth.
