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KT61 marconi 4PCS EL33 suit leak TL10 4PCS valves test
KT61 Marconi 4pcs EL33 suit Leak TL10 4pcs valves test
These are 4 pieces KT61 Marconi with rectangular seal, made in the late 1940's. The KT61 was one of those pentodes used in radio or amp able to give around 10-12 Watts in push pull. The drawing of 25+mA can be considered a good value, hence testing them I got: KT61 (1) 29mA; KT61 (2 ) 30mA; KT61 (3) 32mA; KT61 (4) 29mA. Solid bases and no rattling inside! Thanks for watching
