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That's a pretty good price. My go-to source digikey.com lists it for $15.12 Here is a link to the datasheet for that mixer http://www.analog.com/media/en/technical-documentation/data-sheets/AD831.pdf Scott

I got the parts. Spend a bit of time getting them soldered in place. The extreme heat sinking and close quarters of the traces makes it pretty difficult. First tests, still zero output. I have to come back to it later and start probing and testing. The stacking of the boards certainly...

I haven't heard back from China and went ahead and bit the bullet and opened up the rig. Sure signs of overheating with the digital mode as the silicone grease had started to migrate around the bottom. I found the 16W output mosfets at hobbypcb and ordered them today. ($20 for four) They are...

Chuck, yep, looks like same boat. I have some feelers out in China and if I hear anything I'll let you know. I'm hoping their 2 year warranty applies to this unit as I purchased in in Sep 2016. I'm already looking at new rigs. 73 Scott

After successfully using the X108 for FT8 on 40M and 15M the past two months, it has decided to stop transmitting. No transmit on any mode or any band S-meter will go to max after a few minutes. If the PTT is pressed, the S-meter will clear and go back to normal operation, then back to 60 over...