Grounded grid circuit it is putting out 200 watts PEP. This tube features a hardened glass envelope, a graphite plate and heavy ceramic spacers. 1 Penta Labes 813Vacuum Tube. With 15 watts of drive in a.
Grounded grid circuit it is putting out 200 watts PEP. This tube features a hardened glass envelope, a graphite plate and heavy ceramic spacers. 1 Penta Labes 813Vacuum Tube. With 15 watts of drive in a.