With regard to SM5BSZ's SDR wideband-noise performance table
(http://www.sm5bsz.com/dynrange/dubus313.pdf):
Something doesn't jive with the table in the above report.
I spot checked by looking up the Flex5000A in July 2008 QST, fig 3.
QST shows wideband noise never gets worse than
Yes I was confused by that too, it appears that Leif has adjusted the TX noise
figures from the QST dBc/Hz to a bandwidth of 500 Hz which is what QST use for
RX measurements.
Leif has not actually measured the K3 or KX3, just used the QST results (the
graph of composite noise and converted
: Re: [Elecraft] [KX3] SDR transmitter issues?
Yes I was confused by that too, it appears that Leif has adjusted the TX
noise figures from the QST dBc/Hz to a bandwidth of 500 Hz which is what QST
use for RX measurements.
Leif has not actually measured the K3 or KX3, just used the QST results
Although it is not shown on the graph nor in the text, the ARRL report
shows the noise in dBc/Hz, i.e. a bandwidth of 1 Hz. This must be
adjusted to the appropriate bandwidth. Add 27 dB to get to 500 Hz and
about 33 dB to get to a typical SSB bandwidth.
And the worst noise is about -110
On Mon, Dec 30, 2013 at 10:01 AM, Fred Smith m...@totalhighspeed.comwrote:
...have considered a 1500..
==
If you operate CW, you won't like it. Get a KX3.
Tony KT0NY
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I always get nice comments on my transmit signal using either K3 or
KX3, thanks Elecraft!
The attention to low phase-noise in the LO was one of the primary
reasons I chose the K3 to be the IF for my VHF/UHF/mw
transverters. Since I am in the pursuit of very weak-signals this
it highly
Hi all,
With regard to SM5BSZ's SDR wideband-noise performance table
(http://www.sm5bsz.com/dynrange/dubus313.pdf):
The reason the K3 has excellent wideband transmit noise suppression is that it
is a down-conversion superhet with a very clean synthesizer and transmit chain.
This was
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