It was my take on https://heilhamradio.com/the-pine-board-project/
There's more that could be done. For example, one could build the circuitry to automatically switch and isolate the TX power from blowing out the RX antenna. I did it manually, with the right-most toggle shown in the picture. The isolation was OK, but not great. Notice three black cables right next to each other front to back. Lots of coupling. Should be done externally instead.
Anyone want it?
Another expansion that would be smart: put in more sockets for crystals, and change frequencies with a switch.
Or control that part of the circuit with an external PLL kit.
Seriously, if you want to fiddle with this kind of stuff, I'll box it up along with all extra tubes, tube sockets, etc. that I accumulated to do this project, and ship it off. I never really wanted to HAVE this transmitter. I just wanted to BUILD it, 'cuz I'd not done a tube project since 1977.
And by "you" in the previous, I mean anybody.
Anybody at all.
If you live an expensive distance away, we may have to come to an agreement on shipping. But contiguous US, I can probably manage to ship this to you out of my own pocket.
All the project pages and vids are still up at Heil's website, so if you can trace wires in comparison to a schematic, it's not difficult to figure out exactly where everything goes.
Kelvin n0mql EN35ld