6C4P 6Ц4П RECTIFICADOR RUSO TUBO DE VACÍO NUEVO DE LOTE ANTIGUO PROBADO = 6Z4 ~ EZ90 / 6Z31
A bout Item: Russian 6C4P rectifier tube has similar characteristics as 6Z4 (China), EZ90, 6Z31. Tube is tested with professional tube Tester L3-3. They do not carry technical information. I apply maximum efforts to work better and better.