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Re: #ubitx Fm/Am mode #ubitx

 

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Interesting Radu, have you thought of using a 10.7 IF instead? It might be easier for image rejection but more important is it could be fed from the junction of C40, R37, and 12MHz Xtal filter. At that point you would only have to shift CLK1 frequency about 1.3MHz when shifting modes to AM or FM. That might also use less circuitry.

Skip Davis, NC9O?

On Apr 24, 2018, at 14:55, Radu <radu.loga@...> wrote:

I am just waiting to receive the micro bitx then I will start the experimentation. The idea is to use the bitx as a development board for the additional am/fm components. Meanwhile I started to create the schematics in eagle because in the end my? target is to have a handheld bitx with ssb/am/fm so i will need to design a new layout to fit in a handheld case. For the Fm part I will use a demodulator ic on 455khz, maybe a Sa605.?

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