Originally posted by gyula
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The beat is effectively a high frequency carrier amplitude modulation tuned by the parallel LC circuit and rectified by the diodes.
The claimed output is for Watts of power, but basic crystal oscillators put out circa 100mW or less, and do not have a low enough internal resistance to overcome the cold filamant resistance of an incandescent lamp.
This is why I tried the TPS61254, because it can put out one amp or more at 4.5V, and though it is clocked with a 3.5MHz sense capability, it looks like the output is not chopped at that frequency.
Cheers ........... Graham.
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