[TenTec] How to Wire INRAD Roofing Filter to ATTN in OMNI VI Plus

[Wayne Whitman]

This method worked fine for me:

Here's what you do:
Skip Inrad's instructions numbered 18 through 24.
Set aside the cable/connector provided for J4 on the Inrad board, you
won't need it.
Take the cable/connector provided for J3 and tie the lines together,
then
add an extension so the wire will reach up to the front of the Omni,
plus 4 or 5".
Locate the 3 pin white connector labeled 18, at the left front side of
the Front End Board, as viewed
from the front of the Omni.  Cut the middle wire going to the connector,
leaving a few inches
behind on the connector in case you ever want to reconnect it.  This is
the line that goes to the Attn
switch.  Connect the lead from Inrad J3 to the end of the line going up
to the front panel Attn switch.
Tape up the end still attached to the connector.  Set S1-S4 on the Inrad
board to ON.

That's all.  Inrad now switches in and out with the Attn switch and the
led shows when Inrad is switched in.
All Omni filter switches are unaffected.

73,
Wayne
K4ELO
k4elo at fastmail.fm