[INRAD] Filter Board

[N5IET Bob]

Working with an FT-920 rig, I just installed a 103 filter
board after installing INRAD filters on it. The 250CW and
the 400CW.

After following the instructions very carefully, it does
not seem to be working for some reason.

After tuning into a strong signal on 40 meters - With the
switch in the position toward the mic connector it
utilizes the F1 filter just fine.

In the position toward the DSP (when the second filter
should be in the mix, I get a very low noise receiver but
one with no signals coming in at all (too low).

I have double checked to see that gain is at the twelve
o'clock position, I have checked all solder joints with a
magnifying glass. I have double checked all connections. I
have used both filters independent of soldering them on
the board to make sure they worked.

Does anyone have a drawing or diagram of the board itself
which shows me what voltages to look for on the board, so
I can troubleshoot the board?



 73 fer nw,
Bob N5IET

10X# 37210, FP#-1141, SMIRK#-5177
http://www.n5iet.com/
Code may be taking a back seat for now,
but the pioneering spirit that put the code
there in the first place is out front of it all.