15-11-2018, 05:31 PM
Hi.
Today I decided to connect the output of the set to my Mullard 3-3 test amp and also observe the audio from the set on the scope. On the strongest station the the audio easily overloaded the amp using the ALD110900 with bias, the load resistor is 180k. Same setup with no bias but much lower output. On the strongest station with bias there is no distortion seen on the scope but less bias there is clipping on one half cycle. With a long wire and a 22pf cap to the coil I can receive 6 stations here via the amp, the furthest away being BBC Ulster, without bias it isn't readable even with the amp at full volume but fine with bias.
I'll do a video tomorrow with my results.
Today I decided to connect the output of the set to my Mullard 3-3 test amp and also observe the audio from the set on the scope. On the strongest station the the audio easily overloaded the amp using the ALD110900 with bias, the load resistor is 180k. Same setup with no bias but much lower output. On the strongest station with bias there is no distortion seen on the scope but less bias there is clipping on one half cycle. With a long wire and a 22pf cap to the coil I can receive 6 stations here via the amp, the furthest away being BBC Ulster, without bias it isn't readable even with the amp at full volume but fine with bias.
I'll do a video tomorrow with my results.
