LF/MF,
I want to build an analog oscillator running on 1888....1916 kHz. It
will be used as the input VFO for my PA which divides the frequency by 4
internally. A metallic box with 12V input voltage cables and a RG174
cable for the output is already available. Also a 78L05 with its 100nF
Cs is mounted. Later i can label the scale directly with 472...479 kHz,
so the need to divde by 4 in my head will not be necessary any more.
The output voltage should be arround 12V. The curve form is not
critical, it does not need to be a clear sine wave. However the
frequency should be as stable as possible.
So, what is the best oscillator circuit? Are there strong differences
regarding stability or is it always a question of the temperature? Ah,
it must be a LC oscillator. The adjusting part is a variable C of 33pF
with a 6mm axis.
There are a lot of circuits in the web but maybe one principe is to be
preferred..
73, Stefan/DK7FC
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