Pentode. RF. B7G Base 7-Pin Valve / Tube. 6.3V heaters. Good New Old Stock like Zaerix.
Equivalent to Z77, 5A/160H, 5A/160K, 6AM6, 6F11, 6F12, PM07, 8D3, QZ77, 6024, 6064, CV138 etc
