[EMAIL PROTECTED] writes: > Your CW rig looks pretty neat. I hope to finish mine as a Central > Electronics 20A exciter. With the 20A the VFO is beat against a 9 Mhz rock, > so it can run all the time. I hope that Don's issue requiring maximum > shielding bypasses my configuration. It would be neat if someone could adopt > a DDS VFO to replace the stock VFO in something like a Ranger, and place it > within the Ranger as a VFO replacement. Getting VFO output on 160, and 40 > was stock, and then 80, 20, 15, and 10 meters came about from frequency > multiplication. Any ideas on the easiest way do pull this off?
That would be quite neat, although the VFO in my Ranger is already pretty stable - surprisingly so. But the concept is good - there are *many* boatanchor rigs that have poor VFOs. Using the DDS VFO in a transmitter or receiver alone is quite straightforward, but in mulitband transceive it gets more complicated. And for CW mode you have the 700 Hz transmit offset to consider. In my rig the VFO runs all the time, in RX it is the direct-conversion L.O. and in transmit it is the first stage. For CW I key the driver and the sidetone oscillator. T/R switching is semi-break-in. Getting the 700 Hz shift was a puzzle. Right now for CW ops I just shift the tuning manually from rx to tx, but WA1FFL is going to send me new software that keeps the VFO on all the time and shifts it up 700 when the "key" line is closed. I figure that signal will come from the T/R relay Steve WD8DAS [EMAIL PROTECTED]
