Mullard
EL34 6CA7 Mullard Xf3 Quad (Two Matched Pairs) Blackburn 1974
EL34 6CA7 Mullard Xf3 Quad (Two Matched Pairs) Blackburn 1974
Regular price
€599,50
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€599,50
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One quad (two matched pairs) of genuine EL34 / 6CA7 made by Mullard, Blackburn in 1974, Xf3 codes.
They are rebranded Philips and they are slightly used.
Top mica spacer with 10 support points, folded plates (stapled), two slots on plates, black base with central hole in guiding pin
Tested
Carefully tested and matched by plate current on calibrated Metrix U61-B tester. Tested with 250V on anodes and screen grids and -12V on G1, 100% is 100mA.
Pair No 1 (B4L5 codes): (100/98) mA
Pair No 2 (B4H3 codes): (95/92) mA
Great quad, a lot of life left in some decent amp.
