08-07-2020, 04:41 PM
(This post was last modified: 08-07-2020, 04:42 PM by Murphyv310.)
Hi.
I dug out my Super Regen rod pentode FM radio last evening.
I was always dubious of the quench coil and after some rewinding then trying another coil that was pretty close to the desired value I tried it with great success.
Although the set was quite sensitive it was not very loud, on replacing the quench coil it is much louder. It uses the 1j29b, with 100v HT derived from a tiny little transistor inverter that came from a plasma battery operated rope light. It is now regulated to 100v, and works fine with the 1j29b, again I'm using HiZ phones. I can confirm the 1j42a wont work in the circuit and of course with 6 to 9 volts HT.
The radio is very sensitive now and the audio quality quite good even though its slope detected.
I dug out my Super Regen rod pentode FM radio last evening.
I was always dubious of the quench coil and after some rewinding then trying another coil that was pretty close to the desired value I tried it with great success.
Although the set was quite sensitive it was not very loud, on replacing the quench coil it is much louder. It uses the 1j29b, with 100v HT derived from a tiny little transistor inverter that came from a plasma battery operated rope light. It is now regulated to 100v, and works fine with the 1j29b, again I'm using HiZ phones. I can confirm the 1j42a wont work in the circuit and of course with 6 to 9 volts HT.
The radio is very sensitive now and the audio quality quite good even though its slope detected.
