[TenTec] Paragon II vs Argo revisited

[designer]

While continuing to play with this I've noticed something that might 
invalidate my previous observations. When I click on a spot frequency 
the Paragon goes right there and I can hear the cw station - with a 
1.8KHz filter, but not with the .5KHz filter. When I put the Argo on 
the same frequency I couldn't hear the station - even with the BW 
also set to 1800.

But I could hear the station if I tune up about 800Hz (40 meters). 
When I tuned the Paragon II up, I could also hear the signal and it 
did fit in the .500Hz filter window.

Coincidentally my CW Tone is set for 800Hz.

Both rigs are spot on on WWV freq. so I'm wondering about those 
reported spot frequencies. Are they just a suggestion of where the 
station might be, or do I have to make an "off-set" calculation 
depending upon my CW Tone freq., or was it a just a coincidence?

Anyone with experience in that phenomenon?

- So it could be that the Argo could have heard that XE beacon had I 
tuned around a LOT rather than just widen the bandwidth (same with 
the K2).

73,
Paul