开云体育

On Friday, September 27, 2019, 02:48:03 PM CDT, Bo, OZ2M <groups.io@...> wrote:

Hi

From a market volume point of view it might be an idea to divide the RF boards into:
1) Si5351A, as now. This is more than fine for the vast majority of radio amateurs
2) Si5351A + ADF4351, lower volume. Covers my frequencies of interest
3) Si5351A + e.g. ADF5355, very low volume and very high cost

They may all share the same digital processor and display boards. Could the digital processor board be a RPi? If so, then this may have a huge impact on the price, and there is a much higher volume to drive the development of this platform. It might be a bit more clunky though.

One thing is loss, but also isolation is an issue. I have a circuit on FR4 on my desk right now, where the isolation above 1,7 GHz cannot go higher than around 55 dB. Heavy shielding may help, but shielding and tooling are cumbersome and expensive.

Bo