Yes I'm also hoping/waiting for AM TX to be allowed on an FM filter.
I've yet to try it but I'm sure if I lie to the K3 it'll work... As to
how clean and w/in spec it'll be that would take some looking...
~BTH
On Tue, 2010-05-11 at 07:19 -0600, Duncan Carter wrote:
Using the FM filter for AM
I can't speak for details on the K3. Only generally.
I also have a question regarding asymetric AM modulation
and the K3 - is it
possible for the TX to exceed 100% positive modulation
whilst maintaining
less than 100% negative? Being only new to the AM mode, I
am not sure if it
is
Using the FM filter for AM transmit has been requested but may or may
not happen. According to Wayne, this depends on whether it can meet
transmit specs and development priorities. I'd like to have AM mainly
to work one friend who is running 1950s Harvey Wells gear but all the
filter slots
Thanks for the reply Tom - your information is appreciated. I have been to
your website a few times but I hadn't visited the AM page before. Lots of
good information there. I had to read it a few times to take it all in.
I have done some more research and it appears the K3 TX has a quite
Andy,
This is probably the reason it currently cannot be modulated
in excess of 100% positive. Maybe there will be an update in
the future?
You do not want more than 100% positive modulation with the K3.
If one assumes 25W of carrier, 100% positive modulation represents
100W peak power
Hi Joe,
Yes, you are correct and I understand what you are saying.
However, reduced carrier power from the K3 TX is not an issue if driving an
external amplifier to, say, 100 watts carrier. In this case, output from the
K3 may be only 10 watts carrier (40w peak), leaving plenty of overhead to
In AM analog broadcast, asymmetrical modulation is standard fare.
http://www.vorsis.com/pdfnfoto/Vorsis%20AM10%20InkJet%20090722.pdf
Output specs on page 7.
73 de na6m
On 5/11/2010 10:08 PM, Andy Wood wrote:
Hi Joe,
Yes, you are correct and I understand what you are saying.
However,
Gee, that is a nice toy Mark.
I wonder how many K3's you could buy for the price of one of those
units
Andy VK4KY
--
View this message in context:
http://elecraft.365791.n2.nabble.com/K3-AM-TX-Questions-and-Observations-tp5033894p5039455.html
Sent from the [K3] mailing list
I have recently been experimenting with AM on the low bands using the K3. The
addition of Sync AM RX makes such a difference!
I have noticed on AM TX, use of compression, at any level, causes some
distortion of the waveform at the zero crossing (when viewed on an
oscilloscope) - not really an
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