Is this a good design for a one tube regen?

[bob91343]

Well there is a problem in that there is no control over regeneration. I'd put a variable resistor across the feedback coil; when the resistance is zero there will be no feedback and when the resistor is high you can get as much feedback as you like. Maybe a 10k or 50k pot there.

I don't know anything about the capacitor. If it suits the circuit, you can use it. You can probably figure out how much inductance to wind to resonate with it across the broadcast band.

[electroking]

Originally Posted by bob91343

Well there is a problem in that there is no control over regeneration. I'd put a variable resistor across the feedback coil; when the resistance is zero there will be no feedback and when the resistor is high you can get as much feedback as you like. Maybe a 10k or 50k pot there.

I don't know anything about the capacitor. If it suits the circuit, you can use it. You can probably figure out how much inductance to wind to resonate with it across the broadcast band.

The coil marked 'rotor coil' is probably adjustable, so that coupling of this
inductor with the antenna coil can be varied to control regeneration.
Regards.

[old_coot88]

Lacking a physical adjustment of the tickler ('rotor') coil to throttle regeneration, you'd definitely need a control across it. I've used a 50K pot in that application (with the shell grounded to minimize capacitive effects when using it). Other people have used a small variable cap there instead of a pot.