[Elecraft] [K3] Tunijng the Radio

[Geoffrey Mackenzie-Kennedy]

Dave,

To add to the replies which you have received, the width of your USB signal 
should also include those intermodulation products which appear at 
frequencies less than that of the suppressed carrier frequency, i.e. in the 
LSB region.  If you tuned your K3 to 14.225 MHz, these IMD products would 
fall outside of your General Class portion of the band and could create 
interference.  To be safe I would suggest that you do not operate your K3 in 
USB mode below 14.228 kHz.

In Europe the top end of our 80m allocation is 3.800 MHz, and some European 
hams operate LSB on or very close to 3.800 MHz.  This practice has caused 
some non-amateur users operating just above 3.800 MHz to complain about 
interference from amateur IMD products.  Fortunately those complaints which 
I have heard are still at the "muttering" stage.

73,
Geoff
LX2AO


On July 14, 2012 at 10:39 PM, David Guernsey wrote:


> If I tune my K3 to 14.225 MHz will I be in the General Class portion
> of the 20 meter band, or do I have to allow for the width of my USB
> signal when I transmit?