Crystal filters on main and accessory panels Group Buy 2016

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gebowes
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Joined: Sat Apr 28, 2018 3:50 pm

Crystal filters on main and accessory panels Group Buy 2016

Post by gebowes » Sun Mar 06, 2016 10:49 pm

If you plan on using the crystal filters found on the main (1) and accessory (2) panels, you will need to find a way to isolate the connection pins from ground. They are currently connected to ground as they are plated and there is no isolation on the ground plane. There are two ways this could be done:
1. Cut back the ground plane from the hole on the bottom. This would lose the solder connection support for the pin but if you are using SMA connectors, the base would provide more than enough support.
2, Better, but a little more difficult to do neatly would be to cut a round isolation channel in the ground plane around the pin.
It appears that something went wrong with the holes. They are too big and maybe eliminated the isolation but the filters should still be usable.
Graham



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