I think what you are referring to is the calibrator antenna. It connects to that resistor on one end and goes through the partition and to the band switch. It¡¯s supposed to be open on that end.
On Wednesday, January 29, 2025 at 09:18:59 AM CST, Dave KD5FX via groups.io <land.dave@...> wrote:
UPDATE! I found a white wire not connected to section 4 (starting from the front of the radio). It runs over to a 330K resistor. Picture below. It's the white wire right in the middle of the picture and it runs over to the end of my grey tweeker tool, that's where the 330K resistor is. Can someone with a TR4C check to see where that is supposed to be connected???