In better sets, the grid leak detector's output fed-after filtering out the RF-an audio amplifying valve, or occasionally more than one.
2.
One potential disadvantage of the grid leak detector is that the input impedance of the detector may be affected by the need to self bias the detector tube with grid current.
3.
The grid leak detector circuit output, often taken from the plate of the detector tube, may require additional filtering to remove remnants of the carrier portion of the received signal.
4.
In simple one-valve sets, the grid leak detector directly drove the headphones, since it produced enough audio frequency output from local ( and some distant ) stations as well as radio frequency.
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