Hi,
depends where you want to use them for, and believe that 1960-1964 are the ones to seek. USA 7308’s cannot go wrong, are nice, quiet with very good bass but a bit relaxed on top always leaving something to be desired. Holland ones sound more complete with a bit better attack and sense of flow. Between the 2, Siemens E188CC fills the space nicely with great bass and livilier top.
More effortless sound, flow and richness comes from Holland D-getter 1960, otherwise any VR5 O-getter (generally my favourite E188CC) will do. Even though Holland ones are branded as Philips Miniwatt, Amperex, Valvo, Dario, RT..i would search for Philips Miniwatt SQ or Amperex PQ with 2 stars on them (i’ve seen only 1963). And now to make things more complicated try to listen to some 6N23P (not EV) Voskhods from 1975-1976 NOS, they are fit and forget with the best flow, soundstage and presentation of detail, they do not last as long as the E188CC, can take abuse have the lowest running temperature and are cheaper. Anyway these are the ones i use in my line stage and Hollands or Siemens in my phono stage-depends where you want to use them.
depends where you want to use them for, and believe that 1960-1964 are the ones to seek. USA 7308’s cannot go wrong, are nice, quiet with very good bass but a bit relaxed on top always leaving something to be desired. Holland ones sound more complete with a bit better attack and sense of flow. Between the 2, Siemens E188CC fills the space nicely with great bass and livilier top.
More effortless sound, flow and richness comes from Holland D-getter 1960, otherwise any VR5 O-getter (generally my favourite E188CC) will do. Even though Holland ones are branded as Philips Miniwatt, Amperex, Valvo, Dario, RT..i would search for Philips Miniwatt SQ or Amperex PQ with 2 stars on them (i’ve seen only 1963). And now to make things more complicated try to listen to some 6N23P (not EV) Voskhods from 1975-1976 NOS, they are fit and forget with the best flow, soundstage and presentation of detail, they do not last as long as the E188CC, can take abuse have the lowest running temperature and are cheaper. Anyway these are the ones i use in my line stage and Hollands or Siemens in my phono stage-depends where you want to use them.