Technical Data

№53 Six layer modulator PCB contains about 1,500 parts
The output stage features multiple high voltage, high current, high frequency vertical
MOSFET output devices, as well as eight air core inductors (four on each of the two
amplifier boards). As the high current, low inductance coils are air core (as opposed to
ferrite core) types, there is virtually no problem with saturation at high current levels, a
problem with standard (and less costly) ferrite core inductor types.
Side view of №53 showing modulator board at top, one of two amplifier boards at center, and main power supply at
bottom. Note the large air core inductors, which are custom wound specifically for the №53.