01-01-2014, 08:18 PM
Well, I used a Heathkit RF osc modulating signal for audio scoping, looking at the audiotransformer out, looks good.
Then from my RF genertor I fed modulated signal , both 400 and 1000 Hz, to antenna input, and the output is a pretty clean sinewave.
When it plays the station the output is such that one could not figure out if it is good or not especially with a slow digital scope. But the sound gets distorted. Although one song was almost OK, the next one sounded distorted.
The sinewave output signal gets distorted when the amplitude gets to just above 2V, which although sounds loud is about 1/3 Watt. This is why I suspect transformer, it may not be optimal. Still not sure.
Then from my RF genertor I fed modulated signal , both 400 and 1000 Hz, to antenna input, and the output is a pretty clean sinewave.
When it plays the station the output is such that one could not figure out if it is good or not especially with a slow digital scope. But the sound gets distorted. Although one song was almost OK, the next one sounded distorted.
The sinewave output signal gets distorted when the amplitude gets to just above 2V, which although sounds loud is about 1/3 Watt. This is why I suspect transformer, it may not be optimal. Still not sure.
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