well i seem to have broken my QCX.

things i Know

in cw mode TX continuously in either VFO with no key plugged in

WSPR beacon works OK

Menu works OK

sidetone always on.

can put in practice mode to save tx

i was attempting to check power out with internal power meter when issue started.

any ideas?

thanks and HNY

Barry

NF1O

i get digest mode to email group.

Check the paddle 3.5mm socket, solder bridges or something like that ? The 4-pin header for GPS is in parallell with the socket as well. If it measures low resistance to ground while powered off there's probably something wrong with the board. Measures ~5V on the GPS RX/PPS when the unit is turned on.

Virus-free.

I found that pin 19 on the controller is shorted to ground but it is internal to the chip. I must have slipped and smoked it. If chip is out there is no short to ground. It does OK in practice mode in that it stops TX and it works OK in wspr mode.

Hans, if you read this, how would I get a new Atmel chip? could it be shipped with the GPS that I just ordered?

Thanks and 73

Barry

NF1O

I have been chasing a transmit issue. Make sure that the micro switch key is not shorted closed, the key ja k not shorted closed. Look at the tx and sig gen lines feeding the pa to make sure that either is not turned on all the time. It takes one high enable signal and the clock signal to turn them on. Look at Q6 to make sure it is turned off when in receive. My Q6 was shorted and the pa was turned on even when tx was off. My place to start would be the key lines and make sure they are not shorted to ground, turning the pa on even out of transmit.