(!!) (Best Value Pair) EL34 Mullard Philips XF4 used/strong 1976-1980 (83.6ma and 88.6ma)
1 matched pair) EL34 Mullard Philips XF4 used/strong 1976-1980
1 tube) 83.6ma Gm=11,200 (xf4-B6B3=1976) slightly tarnished base - with printing
1 tube) 88.6ma Gm=11,700 (xf4-B0E4=1980) no printing
TUBES PLUGGED INTO SOCKETS FOR PICTURE
Matched on Amplitrex:
Vplate=265V
Vscreen=250V
Vgrid=-13.5V
Good used Ma range 70-90
Good Gm range 10,000 - 12,000
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 (Best Value Pair) EL34 Mullard Philips XF4 used/strong 1976-1980 (83.6ma and 88.6ma)&Category=vacuum tube&ImageURL=http://cdn.shopify.com/s/files/1/0333/7633/products/1_da1e3404-7ccc-408d-81b8-ec37f3481d7a.jpg?v=1675203684){kind=link}
 (Best Value Pair) EL34 Mullard Philips XF4 used/strong 1976-1980 (83.6ma and 88.6ma) "Pin It")