10-12-2018, 12:56 PM
(This post was last modified: 10-12-2018, 12:58 PM by ppppenguin.)
I was confused by the schematic at first. Then I remembered that there was an old and now neglected convention. Shown as 3 in my sketch. Your schematic uses crossing wires as joining, something that looks ambiguous.
Modern practice is to use 1. in my sketch. A lot of older diagrams use 2. The 3rd version is rare.
ECC82 and ECC83 (and ECC81) are not interchangeable. They have very different characteristics. It might be possible to change a few resistor values to make a circuit designed for one work with the other, but not always very well.
ECC81: Mainly for RF/IF
ECC82: Mainly for pulses and switching
ECC83: Mainly for low noise audio
Modern practice is to use 1. in my sketch. A lot of older diagrams use 2. The 3rd version is rare.
ECC82 and ECC83 (and ECC81) are not interchangeable. They have very different characteristics. It might be possible to change a few resistor values to make a circuit designed for one work with the other, but not always very well.
ECC81: Mainly for RF/IF
ECC82: Mainly for pulses and switching
ECC83: Mainly for low noise audio
www.borinsky.co.uk Jeffrey Borinsky www.becg.tv
