1 matched pair) EL34 Mullard branded Philips NOS XF4 1976-1979

1 tube) 88.5ma Gm=11,750 (xf4-B9D1=1979)

1 tube) 89.2ma Gm=11,750 (xf4-B6E3=1976)

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