1. BITX20@groups.io

Re: Mounting Low Pass Filter Relays On Bottom of Circuit Board

Jim Sheldon
 

Already tried that a long time ago - didn't make much, if any difference on my Siglent SSA 3021X spectrum analyzer so not really worth the trouble IMO.

W0EB

------ Original Message ------
From: "wishbone_aaa" <dlmock@localnet.com>
To: BITX20@groups.io
Sent: 6/9/2019 7:51:42 PM
Subject: [BITX20] Mounting Low Pass Filter Relays On Bottom of Circuit Board

While replacing the four low pass filter relays with Axicom units, a thought occurred to mount the relays on the bottom side of the circuit board. The bottom side is mostly a ground plane. Wonder if there might be any advantage in isolation of signals ? Have no way of measuring. Perhaps someone with more RF experience can comment.
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