Hi gang,
When I bought my K3S line (all kits) 2.5 years ago I was one of those who screwed up and didn’t put the lock washer on the bottom transistors like it said in big bold letters. As a result, I blew those transistors, or maybe something else on the board. It was replaced (reconditioned board) but the new one didn’t work at full output on the upper bands (10-20 meters). Worked fine on 40 where I operate 98% of the time.
The alignment program never made it past 15 meters. Today I found the same basic results except the max output is now around 80 watts on 40 and 80. So, I tightening the screws on the transistors and, the test now goes from top to bottom and every band has at least 50 watts now. But it’s still topping off at 80 watts at best.
The RD15HVF1, what appears to be the drivers, looks to be under $10 each. I think I’d like to try changing those out. But I wanted to pass it by you guys to get some advice first. Tips, tricks, does and don’ts. Am I even barking up the right tree here? I know, I’m an idiot for not reading the instructions better the first time.
73
Dave, AI7R
PS - bought my K3S line on the last day of my prostate cancer radiation treatments. Over two years later there is no sign of it! Guys, get tested!! Silent keys we don’t need.
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