Sounds like a crystal filter has drifted or a carrier oscillator needs adjustment.
On Monday, February 10, 2025 at 01:13:48 PM EST, Paul N5NEN via groups.io <n5nen@...> wrote:
Reports on trial of 4B twins say audio seems clipped and missing lows. ?D104 works fine on my Swann and I tried my Sure 444 with the same result. High pitched and no lows.? ? The result is same on 80, 40, 20. So I need to know what to look for inside. ? ? Could the carrier balance be at fault? ?No one has reported hearing carrier, but that may not be a good test. ?I have already been instructed on setting carrier but can¡¯t trust my understanding and skill to do that job. ?Nothing else comes to my mind as a cause. ?Overall the twins seem to be loading well and getting signal out there. Just sounds bad.? paul N5nen?