click on the transmitter here unther  for look inside the transmitters

          left the rhode & zwarzh sk010               medium the rhode & zwarsh  sk050       recht the rhode & zwarsh  sk 1

here unther te big power transmitter self made  where we in 2002 send  look

here the big  power transmitter  wtih t 4x qb3/300  good for max 1500 watt power

the x tal  transmitter for osc the ef85 as tube  than the el84 as first buffer than the 807 as two the buffer

and than  4x the qb3/300 tubes as amplifire

the 4x qb3/300 on the air

here the  4 x qb 4/100 modulator on the glow

here the  big modulator with 4 x qb 4/100 and the modulation trafo and the trafo for the 10 volt glow

here the big trafo  on input 380 by 20 ampere  gif  the trafo 7000 volt by max 9 ampere  more than must

there for have we a  variac  for 380 and 27 ampere  for make lower  v  for the transmitter and modulation amplifire

i think so that the variac 30% must  for the max power here 

the variac for 380 v

here  the big transmitter complete

here a pict from a transmitter with 2x qb 5/1750  tubes for the amplifire

the osc and the buffers with the glow ant 300v trafo and the stabile make the volts for osc and the buffers

first  the ef85 then the el84 and the 807  tubes