The 12 V6 can surely be made to oscillate but it may well end up doing so in Colpitts mode. At the end of the day you want frequency flexibility with stability and on 7 Mhz the cheap way to do that is with a resonator and a 60pf air variable capacitor in parallel as used in the MST transceiver from the now defunct Oz Qrp. (except he used a varicap diode pair because it was cheaper) you still have to get it up to 50 mW or so to drive the grid of you valve +-6V or so and that is your fun problem to solve. Thee AD 8009 Video amp chip and the BS170 logic level 800mW dissp mosfet are your friends - if not to mention the 74HCt05 open drain Cmos inverter chip (which looks like a digital amplifier with infinite input impedance).
Great building valve equipment with the lovely big components. I have recently made an SSB transceiver, eleven valves, 20W output, 80. 40 and 20. 73
Very cool! Is the schematic online? I’m now looking for a simple tube receiver design for 40m. 73 de VK2AOE
The 12 V6 can surely be made to oscillate but it may well end up doing so in Colpitts mode. At the end of the day you want frequency flexibility with stability and on 7 Mhz the cheap way to do that is with a resonator and a 60pf air variable capacitor in parallel as used in the MST transceiver from the now defunct Oz Qrp. (except he used a varicap diode pair because it was cheaper) you still have to get it up to 50 mW or so to drive the grid of you valve +-6V or so and that is your fun problem to solve. Thee AD 8009 Video amp chip and the BS170 logic level 800mW dissp mosfet are your friends - if not to mention the 74HCt05 open drain Cmos inverter chip (which looks like a digital amplifier with infinite input impedance).
Thank you for the video and I enjoyed your presentation of your working schedule on how made a better Choke. Cheers mate.73.
Glad you enjoyed it. Had fun making it. 73