1 NOS Penta Labs JAN 4-65A Vacuum Tube 65-Watt Tetrode URANIUM GLASS See Photos
65-Watt Transmitting Tetrode. The 4-65A aka 8165 is a transmitting tetrode. It can be used with full input up to 150 MHz and plate dissipation is rated at 65 watts. One is used in Kaar FM-179X, two in Gates CMG-1.
1 Penta Labs 4D21 aka 4-125A Vacuum Tube 125-Watt Tetrode with URANIUM GLASS
1 Penta Labs 4D21 aka 4-125A Vacuum Tube. The 4-125A (aka 4D21) is a transmitting VHF beam tetrode tube. 125 -Watt Transmitting Tetrode. There is Uranium glass where the pins exit the tube – top and bottom – see photos.
1 Penta Labs 813 Vacuum Tube – Tested 200 Watts PEP for Audio or Transmitting
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.
