[TenTec] Frequency difference in dual receivers

Ken Brown ken.d.brown at hawaiiantel.net
Sat Dec 20 16:02:31 EST 2008


>  sure wish both 
> receivers were on same freq when both are using same vfo - not some 5 to 6 
> hz apart.
>
>   
     I don't have an Orion, or any other rig with dual receivers. I have 
had the opportunity to use an Elecraft K3 with dual receivers, both on 
the same frequency, using separate antennas. That setup has really 
helped us at KH6LC to hear weak signals in 160 meter contests. That 
claim can be backed up by the results posted on line for the Stew Perry 
warm-up this year. Having a rig with dual receivers, which are always 
off frequency by a few Hertz or a fraction of a Hertz would be very 
frustrating, having used the K3.

     By the way, if they are a few Hertz off, then they aren't really 
using the same VFO. They may be using the same "virtual VFO" control of 
two separate synthesizers with different resolution step sizes. Even 
with the K3, I believe the two receivers do not use the same VFO. They 
use two separate, yet identical, and phase locked VFOs.

DE N6KB





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