Do you have a translation of the keyer's manual into any other language which
is available "online" ?
Please send mail to dl4yhf(at)qsl(dot)net so I can put a link on it !
Some "frequently asked questions" about the
What is the "QSK" - signal
which can be found in the circuit diagram ?
This signal was once used to drive a Receive/Transmit relay in a small
QRP-transceiver with a built-in keyer. Because I ran out of program
memory space in the PIC, I removed some parts of the "QSK"-routines (maybe
the QSK-output is still driven by the PIC, so you should leave it unconnected).
What is the "HAND-KEY"
- signal which can be found in the circuit diagram ?
When I made the circuit diagram, I thought it might be useful to
connect a "straight key" (or "hand key") to the keyer for tuning purposes
or for QRS. But I ran out of program memory space and so removed this function...
maybe someone else wants to use this input again for his own purpose.
I cannot adjust the
CW speed in the range I prefer ... hw abt that ?
Check if the PIC runs at the clock speed for which the software was made.
Make C2 (which is originally 330 pF) larger to let the PIC run slower. Or
make C1 (originally 220 nF) larger. If still not satisfied, replace the speed
lookup table in the PIC firmware but you will need Microchip's MPASM for
Good luck Carlos !
My keyer draws more than
1 microampere during standby.. why ?
Read the information about the power-down-mode
of the PIC.
Keyer doesn't stop transmitting
or signal sounds strange when transmitting on certain HF bands..
Sound like lots of RF in the shack. Try better (low-inductance) blocking-C's
as described on the Circuit page.
Will the firmware run on a PIC16F628
There is a slightly modified firmware for the PIC16F628 with a few modifications.
Because the 16F628 is cheaper now than the 16F84 (though the F628 has more
RAM and program memory), you should use the 16F628 now. Beware ! These PICs
are pin-compatible, but the oscillator sections are not. The difference is
explained on the circuit page also.