I have been out of town all month. Here is the schematic from which the board was created by EasyEDA. I know everyone made lots of suggestions and provided help while I was testing the sections on the proto boards. I truly appreciate all the input. Since this was my first attempt at creating a PCA, I went a bit overkill on options, such as extensive bypassing and decoupling, jumpers to section the board in case all the functions did not play well. This gives me many options to include or exclude some of the mods that did or did not play well while testing each section on the bench. For receiver use, minimal external controls are needed, but for the transmit function I wished to be able to enable or disable each of the filter sections, depending on their performance and band conditions. So headers were installed so that dupont wires could be interfaced to switches and pots. If all functions are desired, either berg jumpers, or just a wire jumper, may be used to interconnect the various sections. The LM833 did not play as well as expected, but the OP275 worked flawlessly as a differential line driver. At test time, I had only SMD chips, so a carrier was inserted in the respective socket. I have since received a package of OP275 devices with legs to go in the remaining PCAs. After testing, I determined all functions played well except the LM386 amplifiers, and for those the jury is still out. I did intend to leave out two of the electrolytic capacitors. I attempted to use plus and minus 5 volts for the LM386 instead of a single 12 volt supply. I may need a cap between the pot and the input pin. If it works out, the output coupling capacitor location may be bypassed with a jumper.