Hi All, I'm looking for first IF filters for the RA6790 or RA6830 and maybe other models with a 6 KHz bandwidth. I have never seen anything under 8 KHz. I know Harris uses a 6 kHz filter in the 40.455 MHz IF for the HF350. Any suggestions where to find a couple 6 KHz wide parts? I have plenty of 20, 25 and 30 KHz parts. TNX, fc, WA1GFZ