H.H. Scott applications that use the EL34 power beam pentode:

HHSCOTT TYPES:	EL34 -- 6CA7
209 210-E 210-F 240 250 272 280 290	BEAM POWER PENTODE Tube Data provided by Duncan Amplification Glass octal type used in the output stage of audio amplifying equipment. This tube, like other power handling tubes, should be adequately ventilated. Download Duncan's utilities and tube database software.