Schematics

Some of the schematics list a 5V filament supply. I do not recommend you use this setting as it is too low. The VT52 should be run at 6.3V and with exception 7V. The 5V will not give enough emission and choke the tube!!!!

ECC83 - VT52 - 5U4G
single-ended
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ECC83 - VT52
single-ended
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ECC83 - VT52
single-ended
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310A - VT52
single-ended
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ECC83 - VT52
single-ended
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ECC83 - VT52 - 5U4G
single-ended
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310A - 336A - VT52 - 274A
push-pull
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VT52 - 45 - 274A
push-pull
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102D - VT52 - PX4 - 274A
integrated push-pull + riaa
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