[Elecraft] Interesting

[Fred Jensen]

On 4/28/2015 5:02 PM, Jim Lowman wrote:
> I heard elsewhere that Elecraft is ready for 630m when the FCC gives
> final approval.
> I know that the K3 will receive on that band, but what will be needed to
> be able to transmit there (other than a very long antenna)?

Ummm ... don't know. Just because it receives very well down there [with 
the KBPF3], TX may require some mods to the filters, HW or FW.  I'm 
pretty sure it will happen if the FCC ever acts.  My K3 receives very 
well on 630 m.  Most antennas at 630 m are verticals, we will all have 
to decide: a) how much can we afford in a tower; and b) what will the 
HOA accept as "reasonable accommodation." :-)
>
> How about the 2200m band?  Is the K3 receiver sensitivity good enough,
> that low in frequency?

Wayne has already made it clear that MF/LF sensitivity falls off 
steadily below 300 KHz.  I'm going to keep WSPR running on 137 KHZ for 
awhile, but I'm not holding my breath.  Sensitivity seems to go down as 
stated, noise here rises dramatically.  Honestly, I think expecting a 
radio to work perfectly from 100 KHz to 50,000 KHz is like asking the 
government to never make a misteak.

73,

Fred K6DGW
- Northern California Contest Club
- CU in the 50th Running of the Cal QSO Party 3-4 Oct 2015
- www.cqp.org