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Ed - K9EW
Hi Newt,
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You say the carrier is keyed up after your call is sent at 12wpm, but then just hangs.? Here are some things to check: 1)? If you listen to the carrier on your receiver, do you hear a very slight shift in frequency occasionally (it should change frequency by a few *cycles* whenever the voltage on pin 3 of IC1 changes)?? If you can hear that frequency shift, it's working. 2)? If you don't hear that, measure the voltage on pin 3 of IC1 with a DVM (black lead to ground).? It should be toggling occasionally from 0 to 5V.? (You *are* using a 5-6V supply, right?) 3)? Make sure the twisted wires on C3 aren't shorted together.? (If they were shorted, you would see the signal voltage on pin 3 of IC1 on L1.) 4)? Check all your solder connections while you're at it; it only takes one bad connection to ruin your day. 5)? Check the voltage on the "Q3 side" of R6.? It should be between 0 and supply voltage. 6)? Check the voltage on the "Q3 side" of L2.? It should be a little bit lower than the supply voltage. 7)? Do you have an oscilloscope? Report back to us what you've found. 73, ed - k9ew On Sun, Jun 6, 2010 at 11:08 PM, Newton White <k0nwt@...> wrote:
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