Shirley, given that we are looking for a wide bandwidth, we wouldn't need much of matching. I just took the first eight off the smd strip and they worked!
On Fri 4 Jun, 2021, 10:32 PM Shirley Dulcey KE1L, <
mark@...> wrote:
I was eyeing those 40 MHz fundamental mode crystals that you can buy from Digi-Key and Mouser. The prices are reasonable, under 30 cents. Looks like you've now done some of the work to try them out. I do wonder how many it will be necessary to buy to get a properly matched set.
I've been thinking of trying my first sBITX build as a modular one, doing each section of the circuit on a separate board. (Each of the two KISS mixers on a board, the crystal filter on another, and so forth.) Miniaturizing everything onto a single board is less important for something with a 7" touchscreen because it's never going to be small anyway. But I'm also looking forward to seeing the finished board design.
On Fri, Jun 4, 2021 at 10:42 AM Ashhar Farhan <
farhanbox@...> wrote:
I am reassigning pins to simplify the pcb layout. So, please hold on for a week (until I get my pcbs) before starting to make the sbitx.
I also managed a 30 khz wide filter on 40 mhz (whoa!) Which means, we will be able to cover the entire HF band.
On Fri 4 Jun, 2021, 7:53 PM David Forrest, <
drf5na@...> wrote:
The??video,?
the??link to the googledoc presentation materials and
the??repository, with the code chunks like
rx_process() :??
are all enlightening.
