[Collins] Birdies on my 75S-3C

[carl lowry]

Have both the 75S-3C & KWM-2A.
The KWM-2A is a much -hotter- receiver.. better sensitivity .. better volume.
The 75S-3C is down on both Volume & Sensitivity.
What reads 5-9 plus on my KWM most of the time reads S-3-4 on the 75S-3C.
I can tune across the 20Meter band & hear a lot of Birdies all across the band.
No birdies on the KWM-2A.
Even with the antenna switched over to the KWM & not connected to the 75S-3C i still can hear birdies.
Birdies are same in Volume without the  antenna
Suggestions please
Thanks & 73s
Carl, k4zrd