Re: U3S transmitting- how to troubleshoot
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Hi Ryan
The instructions for Rev 5 are on the relay kit page? - and even the instructions for Rev 1, 2, 3 and 4 can also be downloaded from there.?
The jumpers look fine.?
The highest frequency you are going to use, should be in slot 1.?
73 Hans G0UPL
On Tue, Nov 14, 2017 at 3:59 AM, Ted Timmons <ted@...> wrote: Thanks Ryan. I'm working from the LPF relay board down to the main board.? Can you look at my relay jumpers, especially at the 1 and 5 ends? It's the rev5 board, which (I think) is different than the rev4 instructions, I think I'm missing a jumper on the 1, but I'm not sure which pins should be jumped since the layout is a little different.
smaller pic:? I looked through two assembly manuals and the operating manuals, I don't see it again, but I swear the relay ordering was important. Can someone point me at that?
Follow the RF path from the BS170 Q1 to the RF output with a continuity tester. It won't pass the capacitor, so just test the path both sides of the capacitor. If the path is good, then make sure you check the bias of Q1. I measured idle current and just tweaked bias until it was about 5ma higher than idle, and left it, and I'm getting about 350mw out. Plenty good!?
Testing continuity will also check your toroid to make sure that all 4 (if you did the bifilar winding) have continuity. Might not hurt to warm up those solders to be sure you heated the enamel until it burned off. Hope this help! :)
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Ryan Flowers W7RLF
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