1 tube) 7N7 Sylvania branded Philco NOS parallel black plates 1940's in white box

1 section) 7.5ma Gm=2400

1 section) 7.9ma Gm=2600

Good used Ma range 7-8ma

Good used Gm range 2200-2400

(7N7=Loktal 6SN7GT with superb sound - great option for DIY project instead of using 6SN7GT)

- Bottlehead Forum Foreplay III Conversion
- Singlepower Concerto 2007
- Singlepower MPX3
- Peter Millett 307A headphone amp
- Woo WA6 with adapter socket 6DE7 to 7N7
- Mystere ia21 preamp
- Eddie Current
- Masco MA-17

NOTE: ALL the 7N7 listed below have "TRIANGULAR BLACK PLATES" unless stated