Robert,
There is a significant reduction in phase noise.
That means you can work closer to the frequency of another station
without him interfering with the station you are trying to copy.
On transmit, it means your signal is more 'pure' and the sideband
'clutter' on your signal is
Al,
Let me pose a set of conditions, and see if I understand this...
Is the smearing caused mostly by the phase noise sidebands, as a
resultant of phase flicker?
i.e. If the phase noise were reduced on a transmitting VFO, then the
smearing would also be reduced, because the sidebands would no
Hi, Dave.
Well, there is one thing you did not do. A fourth condition, which would
be difficult, a lot more work given what you were doing. That would be
changing his syn first and noting the difference. It might be that the TX
change first would create a different middle picture in the series.
I use a Dell Venue 8 Pro and like many new tablets and phones it uses
USB On The Go for connectivity. Dell sells this:
http://accessories.us.dell.com/sna/productdetail.aspx?c=usl=ens=bsdcs=04sku=470-ABES#Overview
and it allows what you need. USB OTG negotiates charging and data
according to
Hi,
Thanks, I need to think about this a bit prior to commenting on it. :)
--
Thanks and 73's,
For equipment, and software setups and reviews see:
www.nk7z.net
For MixW support see;
http://groups.yahoo.com/neo/groups/mixw/info
For Dopplergram information see:
It would help a lot when your neighbor is not transmitting or transmitting on a
different band. Plus, it is courteous to transmit a cleaner signal.
wunder
K6WRU
CM87wj
http://observer.wunderwood.org/ (my blog)
On Jul 8, 2015, at 9:04 AM, Alan n...@sonic.net wrote:
By the way, a corollary to
Why have such seemingly simple things gotten so hard?
Like nobody ever figured one would want to use and charge a device at
the same time?
This capability should be part of the tablet.
I'd comment on how hard it is to key a radio via a computer these days
but won't.
73 de Brian/K3KO
On
On 07/08/2015 06:02 AM, David Cole wrote:
It occurs to me that the the the RX VFO phase noise would be less
influencing, (on phase noise sidebands), than the transmit VFO phase
noise... Is that correct?
If so, then that would explain why the largest change occurred when
K7OLN got his new
For $59 you must expect to not have all the bells whistles that a $300
tablet
would have. They have to cut cost somewhere.
73, Dick, W1KSZ
On 7/8/2015 8:37 AM, brian wrote:
Why have such seemingly simple things gotten so hard?
Like nobody ever figured one would want to use and charge a
By the way, a corollary to this is that it doesn't help much to improve
the phase noise of your radio if your neighbor's radio is dirty.
Alan N1AL
On 07/08/2015 08:45 AM, Alan wrote:
On 07/08/2015 06:02 AM, David Cole wrote:
It occurs to me that the the the RX VFO phase noise would be less
Did it ever get posted anywhere? Link please. Enquiring minds want to know!73
Don NA6Z
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Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post:
Phase noise in oscillators is a subject much discussed amongst
microwave hams and eme'rs who are trying to obtain optimum reception.
It is not totally agreed but much thought is that MDS is lowered by
having low phase-noise (even in a completely quiet band (no adjacent
signals). Thinking is
My most active neighbor, (I have 5 hams in less than 1/2 mile from me),
runs an Icom 706MKII G, that is a real POS if I have ever seen one...
It takes out most of the band when he is on, and running 100W, as
opposed to the K7OLN's K3, (750 feet form me), when running a KW and I
am able to
I think that once your receiver's phase noise is about 1/10 (-10 dB) of the
incoming transmitted signal's phase noise, the incoming will dominate and
you'll no longer see an improvement no matter what you do to the receiver.
(This is a famous rule-of-thumb we use in any measurement.) From the
I have a neighbour approximately 300 metres away who causes significant
noise QRM on the next two bands LF, S3-5. Less so if I'm working a
higher higher band which I assume is due to cut-off of the TX BPFs in
both the transceiver and the linear.
The transceiver in question is an FTDX5000.
On Wed,7/8/2015 9:04 AM, Alan wrote:
By the way, a corollary to this is that it doesn't help much to
improve the phase noise of your radio if your neighbor's radio is dirty.
I can testify to that! My neighbor 8 miles away runs an IC7600. Real POS.
73, Jim K9YC
Solder paste holds the part in place:
http://www.amazon.com/gp/product/B00M1RC0YY?psc=1redirect=trueref_=oh_aui_search_detailpage
Then an inexpensive hot air rework station completes the job:
http://www.amazon.com/dp/B0055B6NGE/ref=sr_ph?ie=UTF8qid=1436374340sr=1keywords=hot+air+rework
The
I haven't had time to finish editing the K3S video.
Subscribe to the QRP ARCI channel on YouTube and you will get notification
when it is uploaded - www.youtube.com/qrparci
Shouldn't be too long
73
Steve Fletcher, G4GXL
--
QRP ARCI President - www.qrparci.org
Facebook - www.facebook.com/qrparci
Thanks Don:
I'm going to insert a couple brief comments, below:
Date: Tue, 07 Jul 2015 21:54:09 -0400
From: Don Wilhelm w3...@embarqmail.com
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 KBPF3 mod for LF questions capacitor size ?
Message-ID:
The solution is becoming clear. We all need to buy our near neighbours
shiny new K3S's.
Costly maybe but what price for some RF sanity.
Cheers
Martin, HS0ZED
Who has no obvious nearby hams :)
On 08/07/2015 20:28, Mike Harris wrote:
I have a neighbour approximately 300 metres away who causes
Hi Mark,
Get the following Dell Cable:
470-ABESDell Adapter - Micro USB for Data and Charging
It has microUSB to tablet, microusb for power, and then microusb to power
external device.
Inexpensive, works. I use it on my Dell Venue8 Win8.1 tablet.
Gerry Hull, W1VE | Hancock, NH USA
AKA:
All - just wanted to send an update to this group - already did it on the
WSJT-X Yahoo group.
I’ve exhausted all efforts on my end trying to get this “fixed”. Nothing I’m
able to do seems to make digital communication between my iMac, Tascam US-125M,
and my K3 work at 48000 Hz. It works great
Everyone will develop their own techniques for SMD. After doing thousands,
yes thousands, this is what I use. First, don't drink coffee for three days
before you work. It's called caffeine palsy. It's not compatible with SMDs.
Second, if the tweezers don't draw blood when they contact the flesh,
On Wed,7/8/2015 10:28 AM, Mike Harris wrote:
The transceiver in question is an FTDX5000.
According to FCC measurments, it's one of the worst of the expensive
modern rigs for CW bandwidth. BUT -- Yaesu issued a firmware update last
fall, and my before/after measurements of a N6TA's FTDX5000
David Cole d...@nk7z.net writes:
It occurs to me that the the the RX VFO phase noise would be less
influencing, (on phase noise sidebands), than the transmit VFO phase
noise... Is that correct?
If so, then that would explain why the largest change occurred when
K7OLN got his new
This may be off-topic and not specifically Elecraft, but transmitted signal
quality is a big topic on this list.
QST publishes transmitter measurements without a benchmark. What is a good
benchmark? Should they average the best three transmitters tested in the
previous 12 months? I’d love to
Hi Everyone,
In searching the reflector I see a few of you have the same problem that my
KPS-500 has on 6 meter where it trips out with a PA DISS fault. I too did what
the others tried but I get the same results. Of course it is 6 meter season
and my KPA-500 is not helping me by tripping out.
So you are saying the FTDX-5KMP is no longer one of the worst ???
Where does it stack up today, in your opinion ??
73, Dick, W1KSZ
-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim
Brown
Sent: Wednesday, July 08, 2015 6:43 PM
To:
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