(!!!!) (BEST XF4 Pair) EL34 Philips Mullard NOS XF4 1979 (91ma and 94ma)

1 matched pair) EL34 Mullard branded GE NOS XF4 1977 in white boxes 1 tube) 91ma Gm=11,400 (xf4-B9G3=1979) 1 tube) 94ma Gm=12,000 (xf4-B9H1=1979)   Matched on Amplitrex Good mA range 70-90ma Good Gm range 10,000-12,000   Recommended for - Univalve amp- Sonic Frontiers- VTL- Manley - Marantz 2- Audio Sculpture Equilibre or Audio Matiere Equilibre- VOX AC50, AC100 Super DeLuxe - Mad Professor amp, Marshall 50 watt Plexi- Germino Fillmore Classic, VOX AC50, CJ Premier 4, Dynaco ST70- Matchless Chieftain 1995- Park 75- Cornell Plexi 45/50 2003- Two Rock- Hiwatt DR-103 1971- Aestetix power supply- ASL aq1006-845 dt- 65AMPS Producer- Tophat Emplexador