(!!!) (Best Single) GZ30=5Z4GT Mullard UK NOS 1962 (57/30 and 58/30) (rare) 1-2% section balance Title: GZ30

GZ30=5Z4GT Mullard UK NOS “”D”” getter 1962 (5H1-B2F3) very good printing

57/40

58/40

(5Z4GT has same ratings as 5Y3GT, but is indirectly heated like a 5AR4)

– Dared

– Leak TL 10.1

– Woo Audio WA22

– Woo Audio WA5LE