[TenTec] Corsair II DDS VFO

Steve Hunt steve at karinya.net
Wed Mar 23 05:47:35 PDT 2011


I took a quick look this morning. I keyed the Corsair at 30wpm, fast 
QSK, and 100W output into a dummy load. I tried 50kHz and 200kHz 
frequency splits. I listened to the signal on a monitor receiver and 
viewed the RF output envelope on a scope.

I heard no sign of chirps or clicks. The output waveform looked perfect 
- no overshoot, and smooth 4-5mSec rise and fall times.

Steve G3TXQ

On 21/03/2011 18:37, w8au at sssnet.com wrote:
> Steve:
> Do you use split operation on CW?  Curious to know if the DDS osc can handle
> the instantaneous shift of frequencies at a fast keying rate.  Obviously there
> is a delay compared to the External VFO that runs constantly, but is the
> shift noticeable either in a chirp, click or an "enabling delay" that shortens
> the dots?
> 73,&  TIA
> Perry  w8au

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