5703 Raytheon NOS 1950”s (5 in stock)

5) 5703 Raytheon NOS 1950”s in white boxes

5 leads

T3 Flat-Press subminiature

UHF triode

Vil=6V @ 200ma

Mu=25

3.3 watts

Tested on TV-7D/U

5703=rugged 6K4

5703 variant is 6149

– Musical Fidelity Tri Vista 21 dac SACD