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I have a new uBITX v4, very recent batch.? Rx is fine.? I am plugged into 2.9 amp power supply that I use with other QRP rigs, and a good antenna.?

When I push transmit -- I get continuous toggle -- nothing good.? No warmth in PA, it happens too quick to read any current.? I unplugged my mike, run a wire from PTT to ground - same behavior.? I moved all the wires around - no change.? Something seems amiss on the board -- has this seen before?

Curt

Did you connect the keyer jack as shown in the wire up instructions or put a 4.7k resistor across pins 2 and 3 on the Raduino?
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Doug

thanks for reply.? i checked -- i have 4.7k between pins 2 and 3 when measured at the raduino (that connector that's mounted near top of display.?

I am using the uBITX box from Sunil, so it has a preassembled digital bundle cable from raduino to the uBITX -- i have display etc so its not backwards I think.? I will continue to look for an error in my work, but it takes PTT being grounded for rig to go bananas.?

Curt

Solved - I had PTT and ground reversed on my microphone, and then I had wrong pins when I tried to PTT with a piece of wire.? all seems okay now, yes I did align the PA bias as instructed after my effort.

73 Curt