That's right! It is for switching the tx lpfs. - f Sent from BlackBerry® on Airtel -----Original Message----- From: "Steve VK2SJA" <vk2sja@xxxxxxxxxxx> Sender: minima-bounce@xxxxxxxxxxxxx Date: Sun, 19 Jan 2014 23:23:26 To: <minima@xxxxxxxxxxxxx> Reply-To: minima@xxxxxxxxxxxxx Subject: [minima] Bandswitch socket detail? Hi Farhan, Just had a chance to look through the Audrino Sketch. I have a question about band switching. Circuit has bandswitch socket with three bits designated Bandswitch A, B and C. Currently quick inspection seems to show that code only sets/uses Bandswitch A to select either the LPF for 15Mhz or if operating above 15Mhz the other 30 LPF with 20Mhz notch is selected. Is intention to use these three bits in binary to arrive at 8 possible Amateur bands and use the binary output to control either or both different input filters and/or filters in the output of a linear amp? Or is intention other? 73, Steve VK2SJA