12AX7 Phono Schematic.

Jan 15, 2025 9:16 PM

BuckR0gers

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Magnetic Phonograph Preamplifier

llamalizard2000

Have you tried reversing the polarity?

2 years ago | Likes 1 Dislikes 0

MagicBeets

Pins 1 and 6 both triodes anodes need DC voltage, what is the switching stuff at the bottom? I see a B+3 but what does that switch do other than maybe a standby?

2 years ago | Likes 2 Dislikes 0

[deleted]

[deleted]

2 years ago (deleted Jan 16, 2025 7:14 AM) | Likes 0 Dislikes 0

RobErtE87

Thats where the magic comes into play

2 years ago | Likes 1 Dislikes 0

LittleRobot71

B+ is switched on and off depending on if phono is selected.

2 years ago | Likes 1 Dislikes 0