James,
The numbers you quoted for the K2 are for 20Khz spacing. The
numbers Ten Tec quoted are for 5 Khz spacing. As you can see,
the Orion has close in performance that is unmatched by a long shot
by any other popular radio.
Take a look at the close in composite noise too. The Orion is better
at 2 Khz than the K2 at 20 Khz. This contributes to even better close
in performance. At a glance, it looks to me like the synthesizer in the
Orion meets or beats some of the best analog VFO/PTO's for low
noise.
73 de Lee, WA3FIY
On 17 Apr 2003 at 18:30, James R. Duffey wrote:
> There appears to be an error in the performance comparision posted on the
> Ten-Tec site:
>
> ? 5 kHz 2 tone 3rd order dynamic range?? 5 kHz IP3
> IP3????????????????????????????
>
> ORION?????????????????101 dB??????????????????????????????????+24 dBm
>
> Elecraft K2????????????88 dB???????????????????????????????????+1 dBm
>
> Ten-Tec says that the K-2 numbers are from ARRL product reviews, 14 MHz,
> preamp off.
>
> The ARRL procuct review lists these numbers for the K-2
>
>
> Two-tone, third-order IMD dynamic range: Two-tone, third-order IMD dynamic
> range (700-Hz IF filter):
>
> 14 MHz 98 dB
>
> Third-order input intercept point: Preamp off
> 14 MHz +21.6 dBm
>
> These numbers seem to be different, that is better, than the ones Ten - Tec
> posted.
>
> The Orion performance is still better, but not by as much of a margin.
>
> I was going to post the Ten-Tec numbers on the Elecraft list and thought I
> would check them first. Does anyone have an idea where the difference is? Or
> did I miss something obvious? - Dr. Megacycle KK6MC/5
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