Valve (tube) radio question .....?

The schematic of the AA5 (All American 5) is at a href="http://frrl.wordpress.com/2009/01/22/long-live-the-all-american-five-or-recovering-a-piece-of-radio-history/" rel="nofollow"http://frrl.wordpress.com/2009/01/22/lon…/a this one uses octal based valves (12SA7) but the theory is the same for B7G 7-pin based miniature valves (12BE6). The hexode mixer uses K, G1 and G2 as the "triode" Hartley oscillator and the top half of the hexode as the mixer, all done with 7 pins.