Gents, from Tony/K3WX (ex W2GBS), an excellent contribution of a GPT-750, with glowing 810 modulators, at http://www.geocities.com/vintagetmc/810modulatorsglow.html . I say "almost" an addition, as I've yet to add a link from (now snafu'ed) http://www.geocities.com/tmcvintage/picpageindex.html thanks Tony! enjoy, Denis