my recollection on the bel tubes is the same as @tomcy6
philips/amperex set up a plant in india and these were among their production
i never had these, so cannot comment on their s-q
being old stock tubes made under the auspices of one of the major 1st world producers, i would guess they would sound better than modern day 6dj8 equivalents, which are poor sonically
philips/amperex set up a plant in india and these were among their production
i never had these, so cannot comment on their s-q
being old stock tubes made under the auspices of one of the major 1st world producers, i would guess they would sound better than modern day 6dj8 equivalents, which are poor sonically