Thanks for the reminder JC.
Remember. 160 meters was not included in most ham gear not so
long ago. It's a gift we should treasure.
73
Bruce-k1fz
BOG antenna notes have been updated at a new address.
www.qsl.net/k1fz/bogantennanotes.html
On Fri, 23 Oct 2015 08:57:38 -0400,
Great advice indeed.
On Fri, Oct 23, 2015 at 7:57 AM, JC wrote:
> The BEST WAY to handle them is TO PAY NO ATTENTION WHATSOEVER NOT EVEN
> MENTION it or them ... The WORST thing to do is to TAKE NOTICE of them,
> talk about them, call them names, retaliate, etc. acknowledgement ...
> only make
Thank you for posting that JC ! I have never read that before and it is very
appropriate.
Rich K7ZV
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of JC
Sent: Friday, October 23, 2015 5:58 AM
To: 'topband'
Subject: Re: Topband: ADC Overlo
<< What do we do with them?>>
We do what we are! Gentlemen !giving always a good example.
Even almost 40 year later worth reading W1BB.
W1BB>>
GENTLEMENT BAND!!??? ---Shall stress the importance of keeping this UNIQUE
band "The GENTLEMEN! Band", as its reputation has been for so many years
> > Id like to know what SDR was so poor.
> >
> > SPAM SPAM SPAM SPAM ... (with a guys voice trying to sound like a old
woman) Flying Circus any one?
> >
> >
> >> From: bayc...@mediacombb.net
> >> To: patriot...@msn.com; topband@conte
s voice trying to sound like a old
> > woman) Flying Circus any one?
> >
> >
> >> From: bayc...@mediacombb.net
> >> To: patriot...@msn.com; topband@contesting.com
> >> Subject: Re: Topband: ADC Overload from MW transmitters
> >> Date:
...@mediacombb.net
>> To: patriot...@msn.com; topband@contesting.com
>> Subject: Re: Topband: ADC Overload from MW transmitters
>> Date: Tue, 20 Oct 2015 00:52:15 -0500
>>
>> Mike--
>> It is obvious that you do not know who Tom is.
>> and-- the word SPAM follo
End of reading skills ---
Im looking for the SDR and the systematic objective testing procedure used in
the email
> From: w...@w8ji.com
> To: patriot...@msn.com
> Subject: Re: Topband: ADC Overload from MW transmitters
> Date: Tue, 20 Oct 2015 05:53:59 -0400
>
> >
I guess it was a SDR-1000 or Flex5000
73
Peter
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of MIKE
DURKIN
Sent: Dienstag, 20. Oktober 2015 08:08
To: topband@contesting.com
Subject: Re: Topband: ADC Overload from MW transmitters
Come on Bill
d like a old woman)
Flying Circus any one?
> From: bayc...@mediacombb.net
> To: patriot...@msn.com; topband@contesting.com
> Subject: Re: Topband: ADC Overload from MW transmitters
> Date: Tue, 20 Oct 2015 00:52:15 -0500
>
> Mike--
> It is obvious that you do not know who
@contesting.com
Subject: Re: Topband: ADC Overload from MW transmitters
If i must
Tom never mentioned what type of SDR would be wiped out by moderate signals
...
That in its self has three problems ...
NO filtering? (should this be called -- comparing apples to apples, not
apples to
On Mon,10/19/2015 10:07 PM, MIKE DURKIN wrote:
Tom never mentioned what type of SDR would be wiped out by moderate signals ...
Tom cited an SDR wiped out by a VERY STRONG IN-BAND local signal.
73, Jim
_
Topband Reflector Archives - http://www.contesting.com/_topband
rstandable by almost anyone .. check it out, if
not again.
Not sure if i should really send this .. but, what the hell.
> From: bayc...@mediacombb.net
> To: patriot...@msn.com; topband@contesting.com
> Date: Mon, 19 Oct 2015 17:41:41 -0500
> Subject: Re: Topband: A
Rudy Bakalov via Topband wrote:
> This is not true - higher sample rates are just as effective in
> reducing overload as higher bit resolution.
...
> The higher sample rates reduces the probability of multiple signals
> happening at the same time and overloading the ADC.
A higher sample rate
On 10/19/2015 11:59 AM, bruce whitney via Topband wrote:
This has been an interesting discussion.
I heard a rumor that a very prominent and successfully competent multi-multi
contester in IL was going to an all SDR multiple computer control set-up. Which
would seem to be problematic in light
-Original Message-
From: MIKE DURKIN
Sent: Monday, October 19, 2015 10:47 AM
To: topband@contesting.com
Subject: Re: Topband: ADC Overload from MW transmitters
SPAM !!
Mike--
Can you explain this opinion?
In my experience, almost anything Tom takes the trouble to publish is well
I'm still of the opinion --right or wrong-- that there will *always* be
hams using analog technology that will be able to out-hear anyone using an
SDR (even DDS) to copy very weak CW signals at the low end of 160. *But I
have an open mind.* I think it was Barry N1EU that disagreed with me on
that
I'm still of the opinion --right or wrong-- that there will *always* be
hams using analog technology that will be able to out-hear anyone using an
SDR (even DDS) to copy very weak CW signals at the low end of 160. *But I
have an open mind.* I think it was Barry N1EU that disagreed with me on
that (
Does that mean "don't bother me with facts, I've made up my mind?"
Tom presented his experience. He's a damn good engineer, so we should
pay attention to it.
Much earlier in this thread, I observed that most serious contesting
stations using more than one transmitter will have bandpass filter
complicated.
- Original Message -
From: "bruce whitney"
To: ; "Tom W8JI"
Sent: Monday, October 19, 2015 11:59 AM
Subject: Re: Topband: ADC Overload from MW transmitters
This has been an interesting discussion.
I heard a rumor that a very prominent and successfully c
On Mon, 10/19/15, Tom W8JI wrote:
Subject: Re: Topband: ADC Overload from MW transmitters
To: topband@contesting.com
Date: Monday, October 19, 2015, 10:58 AM
I think the problem here is some
people read this as a SDR radios never
overload, or are
SPAM !!
> From: w...@w8ji.com
> To: topband@contesting.com
> Date: Mon, 19 Oct 2015 10:58:44 -0400
> Subject: Re: Topband: ADC Overload from MW transmitters
>
> I think the problem here is some people read this as a SDR radios never
> overload, or are superior in every
quot;
To:
Sent: Monday, October 19, 2015 8:07 AM
Subject: Re: Topband: ADC Overload from MW transmitters
Hi Jim
Clearly in a large US city, there is going to be a whole larger degree of
difficulty than here.
Perth is still pretty much a small city in world terms, with a population
of about
Hi Jim
Clearly in a large US city, there is going to be a whole larger degree of
difficulty than here.
Perth is still pretty much a small city in world terms, with a population of
about 2 million. In addition to the ABC transmitters, we have about half a
dozen other transmitters, but only two
On Sun,10/18/2015 8:59 PM, Steve Ireland wrote:
Phil lives line of sight from the Australian Broadcasting Transmitter
installation in the northern suburbs of Perth. There are three AM transmitters
there which run 24 hours a day, seven days a week:
6PB at 10 kW on 585 kHz; 6RN at 20 kW on 810 kH
G’day
For those topbanders, who have medium wave stations nearby and are thinking
about trying a DDC/DUC SDR, you may find the comments below from Phil
VK6APH/VK6PH (in answer to a query on the Apache Labs reflector a few years
ago) of interest.
Phil lives line of sight from the Australian Bro
Perhaps an alternative analogy would be helpful here...
Each of the many signals can be imagined as its own phasor. One end of
the phasor is anchored on the origin (0 V) and the other is spinning
around the origin at the frequency of the signal with a length equal to
its amplitude. Since the
I have used Orions and agree, the NR (not noise blanker) is remarkably
effective for marginal, below the noise level, signals on SSB. This was
definitely DSP techniques.
Other more modern DSP rigs (e.g. K3, Eagle) do not have that exact feature
in their DSP. I'm not saying that K3 and Eagle DSP ar
I always marveled with my TT Orion 1, before I died, on SSB when a very
strong signal was on frequency that often a weak one would stand out in
the noise suppressed band. Never found out if this was from the DSP or
earlier analog string. N0UU
_
Topband Reflector Archives - http://
Yes, *raise* the trigger threshold.
tnx
Mike / W5JR
Alpharetta GA
> On Oct 14, 2015, at 5:44 AM, Barry N1EU wrote:
>
> It might be a matter of terminology, but the technique actually involves
> RAISING the AGC Threshold so that gain compression only kicks in on the
> strongest signals and ther
It might be a matter of terminology, but the technique actually involves
RAISING the AGC Threshold so that gain compression only kicks in on the
strongest signals and there's a linear gain curve for everything below that
level. From s1 to s9 is a delta of ~48dB, so a full implementation of
K3NA's
That's exactly how I set mine up. Lower the AGC-T to where the band noise and
weak/moderately weak signals aren't hitting the threshold. So maybe S4-5+
signals do hit the threshold. I'm able to still hear the "at noise floor"
signals without pain in the ears from strong signals. They're loud, bu
On Tue, Oct 13, 2015 at 3:56 PM, Barry N1EU wrote:
> But my main
> point here is that a high end xcvr vendor should hopefully not hamstring
> the receiver AGC with a lower dynamic range and prevent such techniques.
>
> Thanks for listening & 73,
> Barry N1EU
>
You can certainly adjust the level
On Tue, Oct 13, 2015 at 8:26 PM, Stephen Hicks, N5AC
wrote:
>
> The only AGC that exists is to map the total dynamic range (in excess of
> 100dB) into the available "comfortable" dynamic range of your ear (the ear
> has a total dynamic range of something around 130dB, but for comfortable
> listen
I though your original post was excellent, Jim, and right on the money.
On Tue, Oct 13, 2015 at 1:29 PM, Jim Garland <4cx2...@miamioh.edu> wrote:
> Having said that, here's the fly in the ointment. There are several
> assumptions buried in the Central Limit Theorem, so its validity isn't as
> u
ndle a volt or
more without overloading their ADC.
73,
Jim W8ZR
> -Original Message-
> From: James Wolf [mailto:jbw...@comcast.net]
> Sent: Monday, October 12, 2015 9:45 PM
> To: 'Jim Garland'
> Cc: topband@contesting.com
> Subject: RE: Topband: ADC Overload
&g
Thanks Mike for explaining the context! I've done extensive weak signal
listening with an Apache Labs ANAN-100D (DDC SDR running OpenHPSDR
software/firmware) compared with a slew of highly regarded analog and
hybrid (dsp i.f.) receivers and if anything, the SDR betters them
slightly. My subjectiv
ilters on the inputs of their SDR rigs)!
73,
Jim W8ZR
> -Original Message-
> From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of
> Stephen Hicks, N5AC
> Sent: Sunday, October 11, 2015 9:24 AM
> To: topband@contesting.com
> Subject: Topband: ADC Overlo
Hi Barry,
Thanks for your input. Yes, I believe we included direct sampling digital
receivers (SDR) versus superhet receivers.
The post I made here today is not complete; rather that re-post everything,
I included a link to the early August discussion, which explained in detail
what I meant. This
On Mon, Oct 12, 2015 at 10:28 PM, Mike Waters wrote:
> But as a recent thread here* established, there is *NO* SDR that can
> perform as
> well as a good ear-brain combo for copying the very weakest of signals
> buried in the noise. Maybe someday, but the future has not arrived yet. :-)
>
>
The s
An SDR is better for several things, yes. One advantage is that
near-perfect extremely narrow filters can (and do) exist in software. But
as a recent thread here* established, there is *NO* SDR that can perform as
well as a good ear-brain combo for copying the very weakest of signals
buried in the
Hi Guys
It's well know the ability to copy weak signal near strong carriers. I run a
QS1R using HDSDR all the time shearing the same RX antenna with my IC7800.
In the last 10 years only once I worked a new country on 160 listening on
the SDR that I was not able to copy using the IC7800. David summ
Then what if we *deliberately* inject hundreds, if not thousands of discrete RF
carriers into our SDR receivers from say...an internal RF carrier or noise
generator, mixed with the desired RF signal to mitigate OL caused by a few
strong carriers? It would be interesting to see the math and
>"The favorable SDR averaging doesn't apply when the RF voltage at the receiver
>input is dominated by one huge signal, and if that signal exceeds the
>capability of the ADC in the radio, overload can definitely occur. So,
>although I believe that nearly all manufacturers will soon migrate to su
SDR rigs)!
73,
Jim W8ZR
> -Original Message-
> From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Stephen
> Hicks,
> N5AC
> Sent: Sunday, October 11, 2015 9:24 AM
> To: topband@contesting.com
> Subject: Topband: ADC Overload
>
> Rick,
>
&
On Sun, Oct 11, 2015 at 5:13 PM, Mike Waters wrote:
> SDR fascinates me, and I intend to experiment with the technology on 160
> meters starting with a Softrock Xtall Lite 9.0 and the matching switchable
> BPF.
>
This is how a lot of people get started. It's a very cool way to
inexpensively di
I hope it's not, too. :-)
SDR fascinates me, and I intend to experiment with the technology on 160
meters starting with a Softrock Xtall Lite 9.0 and the matching switchable
BPF.
73, Mike
www.w0btu.com
On Sun, Oct 11, 2015 at 10:23 AM, Stephen Hicks, N5AC
wrote:
>
> I hope it's not an issue fo
Rick,
I hope it's not an issue for me to post here directly. I am posting here
because I believe that amateur radio has a huge educational component and
ultimately incorrect information services no one. I got started when I was
12 and really knew very little about the hobby. My journey, like mo
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