I ordered a transmitter for 80 and 40 meters, and the version 2 audio processor for the D104 base. I received the processor a few days ago and put it in a D104 with the correct connector on the cable. I then made an adapter and put it into the 3X4D32 rig into the dummy load and checked it out in the mod monitor. Version 2 has a jumper for the noise gate, the gate is very annoying, its not subtle, so I removed the jumper to disable it. It seems to work like VOX, it does not just reduce the gain a bit, it seems more like it shuts the audio off. I need to test the compressor/limiter more, it seemed to limit the negative modulation well when I tested it into my Flex, but let the positive mod exceed 100%. On my 3X4d32 rig it looked like I COULD over modulate on sudden loud words into the mic. There is also no EQ, whatever the D104 gives you is what you get, including real low frequency stuff. That would be fine for the class D and SDR stuff, but might be rough on the mod transformer in tube rigs. Its a basic design, its not supposed to be a fancy do it all device, to be fair. Line level output, not mic level, with a very wide range of output level. I think it has a 6000 hz roll off, not brick wall. I am unsure what the typical D104 goes out to anyway. It seems fine for a minimalist setup with the DYY transmitter, but not a do it all processor. I have a MAX kit to build, that should do almost everything in one device, compression, limiting, phase rotation, preamp, level controls, mixer, selectable bandwidth limiting. Should be just the thing for the K7DYY rig.