Radu Tarta builds great custom preamps much better then commercial for no distributor or dealers custom built using top chokes and transformers
you want remote, Teflon copper sockets , wood or custom face plates
bunch better and less monies for $5-6 k a preamp that would be 2-3 x more $$
if bought commercially and a true expert in Tube engineeering for over 40 years in
CT , USA

