[Elecraft] [K3] Tunijng the Radio

[goldtr8 at charter.net]

Being a SDR there is really no suppressed carrier as the carrier is 
never created only the sideband for the mode selected.   So unless you 
have signficant splatter there should not be an IMD problem with a K3.

Again assuming no splatter and a properly functioning radio.

This is no analog radio and all TX is based on the DSP first and then 
the TX filter last.

~73
Don
KD8NNU


On Sun, Jul 15, 2012 at 7:34 AM, Geoffrey Mackenzie-Kennedy wrote:

> 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?
>
>
>
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