10GK5 Vacuum Tube – VHF Tuner RF-Amplifier Triode (10V-Heater 6GK5 Family)

The 10GK5 is a medium-mu, frame-grid triode built for RF amplification in VHF television tuners — the 10V-heater sibling of the 6GK5.

• Tube type: Medium-mu triode
• Base: 7-pin miniature (B7G)
• Heater: ~10V AC (series-string variant of the 6GK5 family)
• Typical use: RF amplifier front end in VHF television tuners

Also cross-referenced as 6FQ5A/6GK5 in its 6.3V-heater form.