PC Reference Chart

Power Tubes are classified by TC (Transconductance) and PC (Plate Current).
Preamps are classified by HG (High Grade) or HG+ (High Grade Plus).

Tubes with a lower PC number produce a little more background noise for a slightly grungier sound,
good for more rugged styles of music.
Tubes with a higher PC number produce a smoother, clearer sound.

The PC range is very broad, with some tubes going lower and higher than others.

Magic Parts Tube PC Range
Tube Type Lowest Average Highest
Chinese
6L6GCMSTR 15 19-58 68
EL34BHT 15 20-58 65
EL34BSTR 15 20-58 65
KT66C 15 24-70 76
KT88STR 15 19-52 60
6V6GTSTR 15 20-50 60
EL84C 15 22-40 60
6550ASTR 15 16-44 60
JJ Tube
EL84CZ 15 16-36 60
E34LCZ 15 34-50 75
6L6GCCZ 15 30-54 60
7027ACZ 15 40-60 76
6V6GTCZ 15 22-46 60
KT88CZ 15 26-46 60
KT77CZ 15 26-50 65
Sovtek
5881WXT 15 32-50 60
5881R 15 30-50 60
EL84R 15 20-40 60
6L6EH 15 24-40 60
6V6EH 15 20-40 60
EL34EH 15 20-40 60

 

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