Wall Wart Powered "Joneset" Transceiver........based on 1935 Frank Jones designs

OK, one more Regen.

My criteria was:

Basic Regen design is pretty common, so BEFORE the schematic comes the "concept stage", the "what's available in the junkbox stage", back to the "concept stage", followed by the "mechanical/electrical layout stage", then sketch a rough schematic ......and do it all over again. Paper/Computer layout is cheap.

The BC-221 mechanism used in the previous Regen is not required here due to the Band Set and Band Spread capacitor scheme.

I've also wanted to build a Paraset Transceiver since I was born in occupied Delft, Netherlands and my father was part of the Dutch Resistance. I may yet build one, but since making the decision to make this regen receiver a regen transceiver, this will be my QRP "Paraset" and because it's based on Frank Jones designs, I'll call it the "Joneset". More later..........schematic and layout under development, don't assume this works yet.

It will be difficult to obtain power at these low B+ levels, so I was looking for low voltage, high current tube possibilities like the 7044 dual triode. The other point is tube availability. Although I have several 7044s to use, apparently they are not easy to find and an e-Bay search (which is probably representative of availability and popularity) turned up the following numbers: 12AU7-93, 12AT7-88, 12BH7-12, 5687-11, 7044-1. Might also look into the possibility of paralleling two or three for the Tx.

At the start of the project, a mess ? ......looks great to me, check out that dial

Decided to use the 9 pin miniature tubes which allows use of MANY types of dual triodes (12AT7, 12AU7, 12AX7, 12AY7, 12AZ7, 12BH7, 6072, and with a slight pinout change, the 7044 and 5687). What I really need is a "basic" triode for the Regen section and a "power triode" for the AF and Tx sections. All the listed dual triodes should work, but some have higher current capability at ~50V B+. The "best" ones, on paper, appear to be the 7044, and 5687. The higher current capability at low voltages is especially important if you want a 1-3 watts from the transmitter

For simplification we have the following controlables:

  1. RF Gain
  2. 15pf Band Spread variable for tuning (front panel)
  3. 150pf Band Set capacitor (front panel)
  4. 360pf throttle capacitor (front panel)
  5. Load/Tune/Spot for the Tx (front panel)

After the intial placement, mechanical assembly stage, and some experimentation, there were a few conclusions:

Back of the Wall Wart Powered "Joneset" Transceiver........sorta based on 1935 Frank Jones designs

11/09/04 Schematic of the Wall Wart Powered "Joneset" Transceiver........sorta based on 1935 Frank Jones designs

Or here is one with 25C5s in Push-Pull, many implementation alternatives for this basic "Joneset" Transceiver

Where I'm headed today ........Rx portion of the "Joneset"