Hi Don,
Thanks for your explanation.
Yes, I can follow you in this reasoning, and totally agree.
I was clearly not reading carefully enough earlier posts, and was jumping
to conclusions.
Per-Tore / LA7NO
On 1 August 2014 03:32, Don Wilhelm w3...@embarqmail.com wrote:
P-T,
No, a conjugate
Much confusion and misunderstanding about impedance matching at the
output of an RF power amplifier. The output impedance (source impedance)
is NOT necessarily the same as the rated Load impedance. Rather, the
rated Load Z is the Z that the output stage is happy driving based on
its dynamic
I have no clue what the K3 does, but the slickest way to do this is to
first sense the frequency of the tone you want to notch, then create a
tone of the same frequency, shift its phase so that it is exactly 180
degrees out of phase with the interfering tone, make it equal to the
interfering
For both manual and auto notch, the key seems to be to create two
identical streams of signal data and apply different DSP to each. Stream
1 is totally focused on extracting accurate information about the
interfering tones (frequency, amplitude, phase) regardless of any damage
it may do to the
The efficiency would be even less, in practice, if designed that way.
The power transfer theorem isn't useful in most real world cases. In
practice, the optimum load for a PA will be very different from its AC
resistance (the reactive part should be corrected for by the fixed part
of the
Whilst summing the inverted NR output doesn't sound logically any
different from applying a custom filter, the tactic used by hearing aids
(at least Oticon ones) is actually to determine the frequency and phase
of the presumed interfering signal (howl round in that case) and add in
an inverted
Actually, the situation *never* occurs. Any practical transmission line
impedance is complex (reactive), hence a purely resistive load is not a complex
conjugate.
BTW, Zo and Vp vary with frequency too, making the situation even more
complex, pardon the pun.
Wes N7WS
On 7/31/2014 4:20
Phil,
Let me check calendars with the rest of the family and see if I'm
available. If I am, I'll take it. I'll let you know this evening.
73 de,
--Ian
Ian Kahn, KM4IK
Roswell, GA EM74ua
km4ik@gmail.com
K3 #281, P3 #688, KPA500 #1468
HRD v5.x/6.0 Test Team
On Thu, Jul 31, 2014 at 11:11
Excellent!
On 8/1/2014 12:56 AM, Jim Brown wrote:
Much confusion and misunderstanding about impedance matching at the output of
an RF power amplifier. The output impedance (source impedance) is NOT
necessarily the same as the rated Load impedance. Rather, the rated Load Z is
the Z that the
I have severe traumatic hearing loss from one night many years ago when
I still thought I was bulletproof and immortal and I'm pretty deaf above
about 1200 Hz. The Dept of Veterans' Affairs gives me hearing aids,
replacing them every 5 or so years [Thank you US Taxpayers, you change
my
I am selling the XG3 perfect working order and comes with the KXUSB cord.
Price 160.00 U.S shipped pic's are available as well.
Mike
VE3WDM
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Elecraft mailing list
Home:
I have the N-Gen up for sale I put it together myself and no longer need the
unit.
Pictures are available and the price is 50.00 U.S including shipping.
Mike
VE3WDM
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Elecraft mailing list
I built the kit myself and no longer need it. Pictures are available
20.00 U.S including shipping.
Mike
VE3WDM
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Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
This makes me appreciate that effort all the more.
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim
Rhodes
Sent: Wednesday, July 30, 2014 20:18 PM
To: Lynn W. Taylor, WB6UUT
Cc: Elecraft Reflector
Subject: Re: [Elecraft] OT KX3 - Yahoo Group
A few years ago I uploaded sound files to the Elecraft/Yahoo news groups.
You can find them in the files section and they show a comparison of audio
with no notch and with it on.
If your interested in some technical stuff, there's a very good tutorial
about the LMS algorithm on the National
Help,
I just got my new KX3 today, set it up and everything worked all day,
including the ATU. I shut the radio down, put it away and went out. Got
back this evening, set the radio up and turned it on. Tried to use the ATU
and I get the message NO ATU. In the menu it says no ATU installed.
Randy,
Parameter Initialization will set all menu parameters to the defaults.
The default for ATU MD is Not Inst.
Go to the ATU MD menu and set it to either BYP or AUTO.
73,
Don W3FPR
On 8/1/2014 8:50 PM, Randy Moore wrote:
Help,
I just got my new KX3 today, set it up and everything
Thanks, but the PA.MODE MENU was turned on the MENU. I turned it off and
now everything works.
-Original Message-
From: Don Wilhelm [mailto:w3...@embarqmail.com]
Sent: Friday, August 01, 2014 9:35 PM
To: Randy Moore; Elecraft@mailman.qth.net
Subject: Re: [Elecraft] FW: New KX3 ATU Not
The only downsides of the great KX3 and K3 are all
the menu entries to get right :-)
Phil W7OX
On 8/1/14, 6:42 PM, Randy Moore wrote:
Thanks, but the PA.MODE MENU was turned on the MENU. I turned it off and
now everything works.
-Original Message-
From: Don Wilhelm
It appears that what Think Tank once called the Lightening Fast case is now
called the Strobe Stuff, product TT223. It has:
Internal Dimensions: 4.3 W x 9.3 H x 3.0 D (10.9x 23.9 x 7.4 cm)
73 de Dennis KD7CAC
Scottsdale, AZ
On Aug 1, 2014, at 5:52 AM, ve3...@gmail.com [KX3] k...@yahoogroups.com
I decided to try a pair of the Bose Companion II Series 3 with the KX3.
Right away I noticed the sound had a color to it that is out of context in
the white noise.
I utilized some EQ and not being satisfied with the results,
I put them on the Spectrum Analyser and there it was. They have a 10db
21 matches
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