David the site is mainly for the uBitx? multiband and the Bitx40 which is either VFO or "DDS" controlled so many of your comments won't make a lot of sense to those who purchased these pre stuffed boards as in SMD.? It is prolly a bit late to mention this? but? Fred at Far Circuits in US sells a Bitx board set of etched PCBs. you could possibly get him to part with the main bitx board for $15 USD. The other board is the class A power amp which can easily? be done on islanded copper clad board.? AGC can be done with the TDA7062A or AT? chips which have an AGC pin built in .. you sink it to GND with an NPN transistor to mute the chip.? one option there is found by studying the MST3 schematic on the ozQRP.com site of Leon in NSW. go to documents section (or even look at the old MST2 board under the archive documents section) Obviously 2 or four small signal diodes and a ceramic capacitor will give you AGC volts from further back in the radio for? RF agc..... That TDA is hard to get from normal suppliers , Farnell has it but it is all over the PRC ebay internet? at low prices. the TDA without the A or AT suffix does not have the mute pin.? cheers TEF
