27-10-2020, 06:08 PM
Interesting, Trevor!
Adding the second diode should indeed give an improvement (ISTR you saying your rod pentode receiver didn't show the improvement - I'd be interested in further investigation; what happens if you squirt freezer on the diodes to reduce leakage; etc, if you get it going again). And you found an improvement, isn't it great when results follow theory!
The 'length of wire' laid alongside the aerial coil to produce some feedback: I'm guessing that phasing between tuned winding and base winding is important, else feedback would be in the wrong sense. Again, useful to verify!
Adding the second diode should indeed give an improvement (ISTR you saying your rod pentode receiver didn't show the improvement - I'd be interested in further investigation; what happens if you squirt freezer on the diodes to reduce leakage; etc, if you get it going again). And you found an improvement, isn't it great when results follow theory!
The 'length of wire' laid alongside the aerial coil to produce some feedback: I'm guessing that phasing between tuned winding and base winding is important, else feedback would be in the wrong sense. Again, useful to verify!
