date:20150916

I don't view there are many serious VHF and UHF operators today, i.e. 
sufficient to warrant a high performance radio.  Most are repeater 
users.  Seems that a $39 radio model has been proven to be satisfactory 
to most.


The SAT users do require some unique applications to cross band, split 
frequency and address Doppler shift.  The Tropo users need big antennas 
and lots of power and the EME group even more so.  Oh yes, the digital 
modes make things less complex but still, big antennas, good receivers 
and clean transmitters is still mandatory.


I don't find the current breed of "do it all" radios to have outstanding 
performance on VHF and UHF.


73
Bob, K4TAX
K3S s/n 10,163

On 9/16/2015 6:35 AM, ae...@carolinaheli.com wrote:

I still believe it may be possible with the K3S, KRX3 and transceivers to do 
Full cross band duplex. I'll look more closely after my rig is built and on the 
air. Makes for an expensive stand alone UHF/VHF rig tho unless you want HF too. 
But then it's probably overkill just to work SATs. I'll bet with the correct 
transverter we could hear the mars rovers tho.

Jerry Moore
AE4PB, K3S SN# ARRIVES TODAY!!!


-Original Message-
From: Andy McMullin [mailto:a...@rickham.net]
Sent: Wednesday, September 16, 2015 7:22 AM
To: Jerry Moore
Cc: Jim Lowman; elecraft@mailman.qth.net
Subject: Re: [Elecraft] Elecraft SP3 External Speaker details

I’d be interested in that spec too!

Built-in soundcard for digital modes (with one USB connection for it and rig 
control) would be nice as well.

Regards
Andy, G8TQH



On 16 Sep 2015, at 12:06, Jerry Moore  wrote:

If they did a stand alone UHF/VHF I'd suggest it have dual receivers,
cross band tx/rx capability and VFO tracking based on Doppler built in
for SAT work.


[deletia]

My one request to Eric, last year at his presentation at Pacificon,
was for a standalone, all-mode transceiver for 2m and above.
My rationale was that, since Elecraft sells transverters for 2m, 220
MHz and
432 MHz, they already have the technology to make this possible.
It came down to the fact that there may not be a large enough market
for such a transceiver.  Makes sense.

73 de Jim - AD6CW




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[Elecraft] Analog vs. Digital Front Ends

Sorry, I'm not buying that direct sampling front ends are as prone to
overload as many of the posts are suggesting, especially on 20M and
higher.  During the past 3 years, I've worked one CQWW and one ARRLDX
contest from the Northeast with a SteppIR yagi feeding an ANAN-100D with
0dB attenuation and never experienced overload during the weekends.  FWIW,
there's a clear indicator on the PowerSDR screen if ADC overload should
ever occur.

The superior rx audio clarity of the direct sampling front end radio is a
game changer to me, although I'm not a fan of computer GUI's.  So I'm
looking forward to widespread use of direct sampling front ends by
all-in-one-box hf xcvrs.

73, Barry N1EU
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Re: [Elecraft] Analog vs. Digital Front Ends

2015-09-16 Thread brian

Look at the A/D converter as a chip tool that could potentially be used 
in ham RX design.


If one wanted a ham band RX using an A/D front end,  certainly one would 
add front end filters.


Of course, that would only help solve the problem with out of band 
signals.  Handling the vector sum of in band signals would still have to 
be designed for.


The concept however is a good one.  Who knows where these A/D chips will 
be in 2, 5 or 10 years.


I remember when GPS was in its infancy.   Many people thought it was 
crazy to think that a bunch of low orbit non-geosynchronous satellites 
could be used for extremely accurate positioning. Besides the ground 
equipment required would be too expensive for most users.  History 
proves them wrong.



73 de Brian/K3KO



On 9/16/2015 12:25 PM, Joe Subich, W4TV wrote:

On 9/16/2015 12:43 AM, Alan wrote:

So how long before ADC technology catches up to the K3? If Moore's
law applied (doubling of performance every couple years) it wouldn't
be long. Unfortunately Moore's law applies mainly to digital
circuitry but the key parts of an ADC are analog (the "A" in "ADC").
Unless there is a big theoretical breakthrough in ADC architecture, I
think we still have some years to wait.


The question really boils down to when will we see affordable high
voltage ADCs.  The problem is that every signal in the input passband
is in series and the [peak] voltage adds as a vector sum.  So if one
S9+63dB (-10 dBm) signal causes the ADC to overflow (consistent with
the noise loading limit in the AB4OJ/VA7OJ tests of the Flex-6000
series) the ADC limit is 0.1V (peak) at the antenna.  Spread that 0.1V
across multiple [equal strength] signals and you see the following:

 N  "S"
--
 1 S9 +63 dB (-10 dBm)
 3 S9 +53 dB
10 S9 +43 dB
32 S9 +33 dB
   100 S9 +23 dB
   316 S9 +13 dB
  ~450 S9 +10 dB
  1000 S9  +3 dB
 ~1400 S9  +0 dB (-73 dBm)

Since it is the instantaneous peaks that cause problems, increasing 
the number of signals decreases the frequency of the ADC overflows.  
There

is certainly analysis that can be done to compute the probability of a
peak given a specific number of signals and frequency distribution but
my best guess is that the number of signals involved will be somewhere
between 10 and 100.  Of course, if one of those signals is very strong
- a 1.5 KW neighbor 0.5 miles away or a broadcast station that puts
a few volts on any wire in the air - it does not take many (if any)
additional S9+10 dB signals to push the system over the edge.

73,

  ... Joe, W4TV


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-
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2015.0.6086 / Virus Database: 4419/10649 - Release Date: 
09/16/15





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[Elecraft] Test IC-756 Pro II

2015-09-16 Thread Jan


The Icom transceiver has been spoken for
- - to someone not reading this list - -
Cheers, Jan K1ND
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Re: [Elecraft] Analog vs. Digital Front Ends

2015-09-16 Thread ae4pb

Yes but it still has the equivalent. It's just integrated rather than being
separate. That doesn't make it better or worse, it just lowers the component
count.


-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Barry
N1EU
Sent: Wednesday, September 16, 2015 8:42 AM
To: elecraft
Subject: Re: [Elecraft] Analog vs. Digital Front Ends

There's no pre-ADC hardware AGC at work in the radio like there is in the
K3 and Orion.

Barry N1EU

On Wed, Sep 16, 2015 at 8:37 AM, Jerry Moore  wrote:

> Is it possible your rig has AGC that's keeping strong signals down 
> rather than the rejection/selection capabilities of your receiver? 
> Just asking.. I don't know the answer.
>
> -Original Message-
> From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of 
> Barry N1EU
> Sent: Wednesday, September 16, 2015 8:33 AM
> To: elecraft
> Subject: [Elecraft] Analog vs. Digital Front Ends
>
> Sorry, I'm not buying that direct sampling front ends are as prone to 
> overload as many of the posts are suggesting, especially on 20M and
higher.
> During the past 3 years, I've worked one CQWW and one ARRLDX contest 
> from the Northeast with a SteppIR yagi feeding an ANAN-100D with 0dB 
> attenuation and never experienced overload during the weekends.  FWIW, 
> there's a clear indicator on the PowerSDR screen if ADC overload should
ever occur.
>
> The superior rx audio clarity of the direct sampling front end radio 
> is a game changer to me, although I'm not a fan of computer GUI's.  So 
> I'm looking forward to widespread use of direct sampling front ends by 
> all-in-one-box hf xcvrs.
>
> 73, Barry N1EU
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> je...@carolinaheli.com
>
>
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Re: [Elecraft] Analog vs. Digital Front Ends

2015-09-16 Thread Rick Stealey

Barry says:
 >During the past 3 years, I've worked one CQWW and one ARRLDX
> contest from the Northeast with a SteppIR yagi feeding an ANAN-100D with
> 0dB attenuation and never experienced overload during the weekends. 

And Joe presented a very useful tabulation showing how signals combine.
One thing that we should keep in mind is that single band antennas like 
Steppirs, single band dipoles, etc. greatly attenuate out of band signals.  And 
from Joe's data look what a difference 10-20 db can make.  This might be a good 
case against 80/40  fan dipoles and trap tribanders.
Rick  K2XT
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Re: [Elecraft] Analog vs. Digital Front Ends

There's no pre-ADC hardware AGC at work in the radio like there is in the
K3 and Orion.

Barry N1EU

On Wed, Sep 16, 2015 at 8:37 AM, Jerry Moore  wrote:

> Is it possible your rig has AGC that's keeping strong signals down rather
> than the rejection/selection capabilities of your receiver? Just asking.. I
> don't know the answer.
>
> -Original Message-
> From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
> Barry
> N1EU
> Sent: Wednesday, September 16, 2015 8:33 AM
> To: elecraft
> Subject: [Elecraft] Analog vs. Digital Front Ends
>
> Sorry, I'm not buying that direct sampling front ends are as prone to
> overload as many of the posts are suggesting, especially on 20M and higher.
> During the past 3 years, I've worked one CQWW and one ARRLDX contest from
> the Northeast with a SteppIR yagi feeding an ANAN-100D with 0dB attenuation
> and never experienced overload during the weekends.  FWIW, there's a clear
> indicator on the PowerSDR screen if ADC overload should ever occur.
>
> The superior rx audio clarity of the direct sampling front end radio is a
> game changer to me, although I'm not a fan of computer GUI's.  So I'm
> looking forward to widespread use of direct sampling front ends by
> all-in-one-box hf xcvrs.
>
> 73, Barry N1EU
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> delivered to je...@carolinaheli.com
>
>
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Re: [Elecraft] Analog vs. Digital Front Ends

All the serious direct sampling ham xcvrs have single band pass filters
ahead of the ADC for ham band reception so that's not an issue.

Barry N1EU

On Wed, Sep 16, 2015 at 9:13 AM, Rick Stealey  wrote:

> Barry says:
>  >During the past 3 years, I've worked one CQWW and one ARRLDX
> > contest from the Northeast with a SteppIR yagi feeding an ANAN-100D with
> > 0dB attenuation and never experienced overload during the weekends.
>
> And Joe presented a very useful tabulation showing how signals combine.
> One thing that we should keep in mind is that single band antennas like
> Steppirs, single band dipoles, etc. greatly attenuate out of band signals.
> And from Joe's data look what a difference 10-20 db can make.  This might
> be a good case against 80/40  fan dipoles and trap tribanders.
> Rick  K2XT
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[Elecraft] Warm greetings extended overseas through Elecraft mailing list

2015-09-16 Thread Tom Morehouse


Just wanted to pass a note that I returned, with my KX3 intact, from a 
wonderful trip to Italy for two weeks thanks to advise and counsel through this 
list serve.  Operating from a hillside villa overlooking the town of Todi was 
quite an experience.

More remarkable, I received an invitation from Franco, I1FQH, to visit him 
while we were in Piemonte (as a result of the communications on this site).  
Franco was more than gracious and allowed me to operate from his gorgeous 
hillside station with a wonderful vineyard, orchards, an amazing cat and a 
superb antenna farm.  Then we had a delightful lunch with excellent food -- 
another real treat.  What a delightful experience and wonderful host -- both my 
wife and I had an experience that we'll long remember.  Mille Grazie, Franco.

Thanks to all 

73,
 Tom K4AEN

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Re: [Elecraft] Analog vs. Digital Front Ends

2015-09-16 Thread Phil Wheeler

Re GPS: Hardly a "low" orbit, Brian: 'GPS 
satellites fly in medium Earth orbit (MEO) at an 
altitude of *approximately 20,200 km* (*12,550 
miles*). Each satellite circles the Earth twice a 
day.'


Phil W7OX

On 9/16/15 5:54 AM, brian wrote:
Look at the A/D converter as a chip tool that 
could potentially be used in ham RX design.


If one wanted a ham band RX using an A/D front 
end,  certainly one would add front end filters.


Of course, that would only help solve the 
problem with out of band signals.  Handling the 
vector sum of in band signals would still have 
to be designed for.


The concept however is a good one.  Who knows 
where these A/D chips will be in 2, 5 or 10 years.


I remember when GPS was in its infancy.   Many 
people thought it was crazy to think that a 
bunch of low orbit non-geosynchronous satellites 
could be used for extremely accurate 
positioning. Besides the ground equipment 
required would be too expensive for most users.  
History proves them wrong.



73 de Brian/K3KO


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Re: [Elecraft] Analog vs. Digital Front Ends

2015-09-16 Thread Joe Subich, W4TV



On 9/16/2015 9:16 AM, Barry N1EU wrote:

All the serious direct sampling ham xcvrs have single band pass filters
ahead of the ADC for ham band reception so that's not an issue.


Not true - the Flex-6300 has no preselectors.  Even if the transceiver
includes preselectors (bandpass filters), defining a second "slice
receiver" on a different band causes the preselector to be bypassed.
The preselector (most of which are not very "tight") only works when
operations are confined to a single band.

Those who live in RF quiet locations - no nearby neighbors, no MF or
HF broadcast, etc. - can get away with current direct sampling SDRs
just like those in quiet locations can get away with an IC-706 or 7000.
The *real performance* of the direct sampling technology is equivalent
to a moderate performance conventional transceiver with broadband IF
panadapter.

73,

... Joe, W4TV
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Re: [Elecraft] Analog vs. Digital Front Ends

2015-09-16 Thread Jim Bolit

Interesting.
The government is a big driver for wide range receive capabilities / signal 
analysis, but cost is not the main driver there.
Jim
W6AIM




 Original message 
From: Lyle Johnson 
Date: 9/16/2015  9:40 AM  (GMT-06:00)
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Analog vs. Digital Front Ends

One has to ask, "Which large consumer of high dynamic range, high-speed
sampling ADCs is requiring more performance than presently exists?  What
drove the market for the present ones?"

The driver for the current generation, based on limited information, is
the technical requirements for cellular base stations.  Perhaps as we
move from the current generation to the next generation of mobile
devices, we'll see a need arise for better base station performance.

To get another 15 to 18 dB of blocking dynamic range (BDR), we need 3
more effective bits.  This either comes from more bits at conversion
time (a 20-bit high-speed ADC instead of a 16-bit), increasing the
sampling rate dramatically while maintaining the same effective number
of bits (ENOB as it is called in data sheets), or a combination of
both.  And of course you also need the downstream digital devices,
usually field programmable gate arrays (FPGAs) to implement what we
think of as the receiver (oscillators and mixers and filters) that can
handle the required interfaces at the necessary speeds, and the internal
resources to maintain precision).

Until there is a viable market for a large number of such ADCs,
semiconductor manufacturers are unlikely to invest a lot in R and D to
get there.  At this point, they want to compete with each other for the
existing market, so they try to offer incremental advantages over their
competitors.

We may eventually be able to buy ADCs with the required performance to
obtain the BDR many of us want and some of us need, but unless there is
a large demand for the products whose design needs include ADCs that
will provide this performance, there is little incentive for their
development.

My personal opinion only,

Lyle KK7P
>
>> So how long before ADC technology catches up to the K3? If Moore's
>> law applied (doubling of performance every couple years) it wouldn't
>> be long. Unfortunately Moore's law applies mainly to digital
>> circuitry but the key parts of an ADC are analog (the "A" in "ADC").
>> Unless there is a big theoretical breakthrough in ADC architecture, I
>> think we still have some years to wait.
>
> The question really boils down to when will we see affordable high
> voltage ADCs.

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[Elecraft] Station setup

2015-09-16 Thread Dennis

I too am beginning to build a new operating desk for use with a K line and 
several other radios. Woodworking is my other hobby so the desk will be a 
rather involved and lengthy project. Solid woods from one inch to three inch 
thickness will insure strength throughout. The main desktop will be 29 inches 
from the floor, a standard dimension. The top will be 60 inches wide by 30 
inches deep. A two shelve hutch set back 10 inches from the desktop front will 
be separated 10 inches apart with open backs and partially closed sides. A thin 
(2 inch) center drawer below the desktop on the front apron will be 20 inches 
wide to contain log books, pencils and such. The main dimension is the table 
top. I want it large enough to hold two transceivers plus cw paddles 
comfortably with amplifiers located above each on the first hutch shelf. 
Additional receivers will also fit on the first shelf making them an easy reach 
from the chair in the center of the desk. The desk will be a straight front
   design, no wrap around curve. I have found through years of experience that 
building in as much room as possible is the way to go. This desk will go in a 
room corner tight against the walls with a window to the left of this location. 
A dark desk top, black walnut, will need good illumination. Should be a fun 
project. 


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Re: [Elecraft] Analog vs. Digital Front Ends

2015-09-16 Thread Lyle Johnson

One has to ask, "Which large consumer of high dynamic range, high-speed 
sampling ADCs is requiring more performance than presently exists?  What 
drove the market for the present ones?"


The driver for the current generation, based on limited information, is 
the technical requirements for cellular base stations.  Perhaps as we 
move from the current generation to the next generation of mobile 
devices, we'll see a need arise for better base station performance.


To get another 15 to 18 dB of blocking dynamic range (BDR), we need 3 
more effective bits.  This either comes from more bits at conversion 
time (a 20-bit high-speed ADC instead of a 16-bit), increasing the 
sampling rate dramatically while maintaining the same effective number 
of bits (ENOB as it is called in data sheets), or a combination of 
both.  And of course you also need the downstream digital devices, 
usually field programmable gate arrays (FPGAs) to implement what we 
think of as the receiver (oscillators and mixers and filters) that can 
handle the required interfaces at the necessary speeds, and the internal 
resources to maintain precision).


Until there is a viable market for a large number of such ADCs, 
semiconductor manufacturers are unlikely to invest a lot in R and D to 
get there.  At this point, they want to compete with each other for the 
existing market, so they try to offer incremental advantages over their 
competitors.


We may eventually be able to buy ADCs with the required performance to 
obtain the BDR many of us want and some of us need, but unless there is 
a large demand for the products whose design needs include ADCs that 
will provide this performance, there is little incentive for their 
development.


My personal opinion only,

Lyle KK7P



So how long before ADC technology catches up to the K3? If Moore's
law applied (doubling of performance every couple years) it wouldn't
be long. Unfortunately Moore's law applies mainly to digital
circuitry but the key parts of an ADC are analog (the "A" in "ADC").
Unless there is a big theoretical breakthrough in ADC architecture, I
think we still have some years to wait.


The question really boils down to when will we see affordable high
voltage ADCs.


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Re: [Elecraft] Analog vs. Digital Front Ends

You're right about the 6300 Joe.   I don't consider the Flex 6300 as
"serious" in terms of a serious contesting radio.  I would expect a serious
contester to go with the Flex 6500/6700 or ANAN 100 or 200 series.

On a crowded band being pounded by strong signals, the direct sampling ANAN
rx sounds cleaner to my ears than the K3 or Orion.  I don't see the
overload issues hypothesized by many on this thread.  But maybe I'm wrong.

The K3 and Orion are ergonomically superior contesting radios however.

Barry N1EU

On Wed, Sep 16, 2015 at 10:27 AM, Joe Subich, W4TV  wrote:

>
> On 9/16/2015 9:16 AM, Barry N1EU wrote:
>
>> All the serious direct sampling ham xcvrs have single band pass filters
>> ahead of the ADC for ham band reception so that's not an issue.
>>
>
> Not true - the Flex-6300 has no preselectors.  Even if the transceiver
> includes preselectors (bandpass filters), defining a second "slice
> receiver" on a different band causes the preselector to be bypassed.
> The preselector (most of which are not very "tight") only works when
> operations are confined to a single band.
>
> Those who live in RF quiet locations - no nearby neighbors, no MF or
> HF broadcast, etc. - can get away with current direct sampling SDRs
> just like those in quiet locations can get away with an IC-706 or 7000.
> The *real performance* of the direct sampling technology is equivalent
> to a moderate performance conventional transceiver with broadband IF
> panadapter.
>
> 73,
>
> ... Joe, W4TV
>
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Re: [Elecraft] Analog vs. Digital Front Ends

2015-09-16 Thread Wes (N7WS)

I'm having a hard time understanding where the frequency selectivity of a piece 
of wire comes from.


On 9/16/2015 6:13 AM, Rick Stealey wrote:

And Joe presented a very useful tabulation showing how signals combine.
One thing that we should keep in mind is that single band antennas like 
Steppirs, single band dipoles, etc. greatly attenuate out of band signals.  And 
from Joe's data look what a difference 10-20 db can make.  This might be a good 
case against 80/40  fan dipoles and trap tribanders.
Rick  K2XT  
_


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Re: [Elecraft] Analog vs. Digital Front Ends

2015-09-16 Thread Guy Olinger K2AV

In the late 60's W4BVV put a full size 3 el 40m yagi on a 70 foot boom up
150 feet. This would qualify as a passive front end. Pointed at Europe, at
the shack end of coax, peak to peak RF on a scope would measure five to ten
volts when the band was open.

What will today's direct samplers do with 10 volts RF in band on the
antenna terminal?

73, Guy K2AV

On Wednesday, September 16, 2015, Rick Stealey  wrote:

> Barry says:
>  >During the past 3 years, I've worked one CQWW and one ARRLDX
> > contest from the Northeast with a SteppIR yagi feeding an ANAN-100D with
> > 0dB attenuation and never experienced overload during the weekends.
>
> And Joe presented a very useful tabulation showing how signals combine.
> One thing that we should keep in mind is that single band antennas like
> Steppirs, single band dipoles, etc. greatly attenuate out of band signals.
> And from Joe's data look what a difference 10-20 db can make.  This might
> be a good case against 80/40  fan dipoles and trap tribanders.
> Rick  K2XT
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>


-- 
Sent via Gmail Mobile on my iPhone
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Re: [Elecraft] Station setup

2015-09-16 Thread Al Gulseth

I want to see some pics of this when it's finished.

Ever thought of going into the furniture manufacturing business? (Anyone else 
here remember the Design Industries "furniture-styled communications console" 
and "'wife-approved' communications desk" from back in the 1960s?)

73, Al

On Wed September 16 2015 9:50:58 am Dennis wrote:
> I too am beginning to build a new operating desk for use with a K line and
> several other radios. Woodworking is my other hobby so the desk will be a
> rather involved and lengthy project. Solid woods from one inch to three
> inch thickness will insure strength throughout. The main desktop will be 29
> inches from the floor, a standard dimension. The top will be 60 inches wide
> by 30 inches deep. A two shelve hutch set back 10 inches from the desktop
> front will be separated 10 inches apart with open backs and partially
> closed sides. A thin (2 inch) center drawer below the desktop on the front
> apron will be 20 inches wide to contain log books, pencils and such. The
> main dimension is the table top. I want it large enough to hold two
> transceivers plus cw paddles comfortably with amplifiers located above each
> on the first hutch shelf. Additional receivers will also fit on the first
> shelf making them an easy reach from the chair in the center of the desk.
> The desk will be a straight front design, no wrap around curve. I have
> found through years of experience that building in as much room as possible
> is the way to go. This desk will go in a room corner tight against the
> walls with a window to the left of this location. A dark desk top, black
> walnut, will need good illumination. Should be a fun project.
>
>
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Re: [Elecraft] K3 / K3S Station setup question

2015-09-16 Thread Mark Stennett

At my house we have a three car garage. We turned the bay closest to the tower 
into a 10X15 radio room by filling in the floor with concrete, tiling the floor 
to match the house and adding a new wall 8 feet inside the roll up door. Add 
HVAC duct off the whole house system, run a 240 VAC circuit and repurpose the 
existing 110 VAC circuits and we are good to go. The remaining 8 foot space 
becomes storage with access from the original roll up door.

73 de na6m


> On Sep 16, 2015, at 10:50,   wrote:
> 
> Hi All,
> 
> My objective has always been (but rarely achieved) to just have a well suited 
> part of the house where my station could be housed.  You would think, 
> considering the fact that most of the houses we have owned were fairly decent 
> in size, that there would be such a place therein.  However, raising 
> children, and keeping the XYL happy, often tend to conflict with this 
> objective.  As children grow, and eventually vacate their bedrooms, space may 
> become available, but more often than not it is not in the most advantageous 
> part of the house!   Besides, children often come back, or at least come to 
> visit often!  So, I usually get relegated to the garage!  Finding a properly 
> designed/configured house is almost as difficult as just finding a house in a 
> neighborhood that doesn't discriminate against ham radio all together!  The 
> bottom line is that I've yet to get to the point where I could concentrate on 
> efficient "configuration".  I'm still looking for available space  Oh, 
> and I sh
 ou
> ld add this.  Long ago my wife bought me a plaque to display wherever I did 
> set up my station.  It reads "It takes a real expert to create a mess like 
> this!"
> 
> Dave W7AQK
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Re: [Elecraft] KPA500 Connection to K3S

2015-09-16 Thread ae4pb

Accessory plug?

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
Amateur Radio Operator N5GE
Sent: Wednesday, September 16, 2015 12:10 PM
To: Elecraft Reflector
Subject: [Elecraft] KPA500 Connection to K3S

Now that the K3S has no RS232 connectors, is there any change in the way the
KPA500 connects to the K3S?

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Re: [Elecraft] Station setup

2015-09-16 Thread Don Wilhelm

If you cannot leave room behind the desk and you are designing the desk, 
consider putting the desk pedestals on appliance rollers so you can pull 
the desk away from the wall to service the back of the equipment.

That is how mine will be if I ever get it finished.

73,
Don W3FPR

On 9/16/2015 11:51 AM, DGB wrote:
If you have the room, leave at least 2' behind the desk ... remember 
all the wires you'll have behind that equipment!


See K9CT'S website for good reference.

Have fun ... 73 Dwight NS9I



This desk will go in a room corner tight against the walls with a 
window to the left of this location. A dark desk top, black walnut, 
will need good illumination.


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[Elecraft] KPA500 Connection to K3S

2015-09-16 Thread Amateur Radio Operator N5GE

Now that the K3S has no RS232 connectors, is there any change in the
way the KPA500 connects to the K3S?

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Re: [Elecraft] K3: reverse 12 volt supply

2015-09-16 Thread Richard Fjeld



Thanks for all the replies with sources to find stranded, paired wire.  
I saved them all.
My sources suddenly quit. I feared the wire mfg's may have gone 
off-shore, and I might have to use pastel colors (tic).


And finally, FWIW, it seems someone is using my callsign.  If you Google 
it, you will see scores of pictures being posted to it on social media 
sites.  I have had QSL cards in error also.

It not me, folks.

Trashed, or not, I hope to celebrate 40 years with this call next year.  
I received the ARRL WAS Bi-Centennial certificate in '76 shortly before 
receiving this call in the mail.


Thanks for the bandwidth and 73,

Dick, n0ce

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Re: [Elecraft] KPA500 Connection to K3S

2015-09-16 Thread Wes (N7WS)


Not if you use the AUX bus

On 9/16/2015 9:09 AM, Amateur Radio Operator N5GE wrote:

Now that the K3S has no RS232 connectors, is there any change in the
way the KPA500 connects to the K3S?

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Re: [Elecraft] K3 / K3S Station setup question

2015-09-16 Thread w7aqk

Hi All,

My objective has always been (but rarely achieved) to just have a well suited 
part of the house where my station could be housed.  You would think, 
considering the fact that most of the houses we have owned were fairly decent 
in size, that there would be such a place therein.  However, raising children, 
and keeping the XYL happy, often tend to conflict with this objective.  As 
children grow, and eventually vacate their bedrooms, space may become 
available, but more often than not it is not in the most advantageous part of 
the house!   Besides, children often come back, or at least come to visit 
often!  So, I usually get relegated to the garage!  Finding a properly 
designed/configured house is almost as difficult as just finding a house in a 
neighborhood that doesn't discriminate against ham radio all together!  The 
bottom line is that I've yet to get to the point where I could concentrate on 
efficient "configuration".  I'm still looking for available space  Oh, and 
I shou
 ld add this.  Long ago my wife bought me a plaque to display wherever I did 
set up my station.  It reads "It takes a real expert to create a mess like 
this!"

Dave W7AQK
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Re: [Elecraft] Station setup

2015-09-16 Thread DGB

If you have the room, leave at least 2' behind the desk ... remember all 
the wires you'll have behind that equipment!


See K9CT'S website for good reference.

Have fun ... 73 Dwight NS9I



This desk will go in a room corner tight against the walls with a window 
to the left of this location. A dark desk top, black walnut, will need 
good illumination.


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Re: [Elecraft] Station setup

2015-09-16 Thread George Dubovsky

When I was faced with the need for more room - and access - I went
"mobile". Here is the description of my current operating desk in the
October 2013 issue of the PVRC newsletter:

http://pvrc.org/Newsletters/oct13.pdf

I'm a metalworker more than a woodworker... ;-)

73,

geo - n4ua

On Wed, Sep 16, 2015 at 11:51 AM, DGB  wrote:

> If you have the room, leave at least 2' behind the desk ... remember all
> the wires you'll have behind that equipment!
>
> See K9CT'S website for good reference.
>
> Have fun ... 73 Dwight NS9I
>
>
>
> This desk will go in a room corner tight against the walls with a window
> to the left of this location. A dark desk top, black walnut, will need good
> illumination.
>
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Re: [Elecraft] Elecraft SP3 External Speaker details

2015-09-16 Thread Bob


I've made no decision yet on the purchase.

However I note with interest that the email title says "Speaker details".  But 
this thread has had none other than Wayne's statement of SPL.   I'm curious as 
to the response curve.  Is it flat or Communications?   I'd be looking for flat 
as in my opinion the K3 should deliver the desired response  and the SP3's job 
is to just make a faithful reproduction of it


More technical "details" are needed

73,
Bob
K2TK  ex KN2TKR (1956) & K2TKR

On 9/15/2015 11:06 PM, Alan wrote:

On 09/15/2015 07:17 PM, Fred Jensen wrote:

I am truly stunned that a simple speaker could generate this much
interest. :-)


Considering the endless discussions of headphones and microphones, I'm not 
surprised.  :=)


Alan N1AL




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Re: [Elecraft] KPA500 Connection to K3S

2015-09-16 Thread Jack Brindle

No. The KPA500 never used RS-232 to connect to the K3 or K3S. It uses the AUX 
I/O connection.

- Jack, W6FB


> On Sep 16, 2015, at 9:54 AM, ae...@carolinaheli.com wrote:
> 
> Accessory plug?
> 
> -Original Message-
> From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
> Amateur Radio Operator N5GE
> Sent: Wednesday, September 16, 2015 12:10 PM
> To: Elecraft Reflector
> Subject: [Elecraft] KPA500 Connection to K3S
> 
> Now that the K3S has no RS232 connectors, is there any change in the way the
> KPA500 connects to the K3S?
> 
> __
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Re: [Elecraft] Station setup

2015-09-16 Thread Mike Reublin NF4L

Unless there's a real space issue, forego the wheels ans just put the desk a 
couple of feet from the wall. KISS 
8-{o}.

73, Mike NF4L


> On Sep 16, 2015, at 1:15 PM, Jim Brown  wrote:
> 
> On Wed,9/16/2015 7:50 AM, Dennis wrote:
>> This desk will go in a room corner tight against the walls with a window to 
>> the left of this location.
> 
> Make sure that it moves, so that you can get behind it to hook up gear. If 
> you can't get behind it, hookups are a PITA, and wiring can quickly become a 
> mess. It also makes it difficult to reconfigure your station. Ask me how I 
> know. :)
> 
> Also make sure that you have easy cable paths between levels, and between the 
> desk and antenna entry, and for power.
> 
> 73, Jim K9YC
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Re: [Elecraft] Analog vs. Digital Front Ends

2015-09-16 Thread Rick Stealey

If I'm using my 40 m dipole and go to 80 meters the signals will jump up 
SIGNIFICANTLY if I switch to my 80 meter antenna.  Several S units.
Same on 20.
So, if instead of a single band 40 m dipole I had a 80/40 fan dipole, wouldn't 
an SDR have to deal with stronger signals in total?  
Same as if we were talking about a Steppir vs a trapped tribander on 10-20 
meters.

Rick  K2XT

> To: elecraft@mailman.qth.net
> From: w...@triconet.org
> Date: Wed, 16 Sep 2015 08:21:03 -0700
> Subject: Re: [Elecraft] Analog vs. Digital Front Ends
> 
> I'm having a hard time understanding where the frequency selectivity of a 
> piece 
> of wire comes from.
> 
> On 9/16/2015 6:13 AM, Rick Stealey wrote:
> > And Joe presented a very useful tabulation showing how signals combine.
> > One thing that we should keep in mind is that single band antennas like 
> > Steppirs, single band dipoles, etc. greatly attenuate out of band signals.  
> > And from Joe's data look what a difference 10-20 db can make.  This might 
> > be a good case against 80/40  fan dipoles and trap tribanders.
> > Rick  K2XT  
> > _
> 
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Re: [Elecraft] station setup,

2015-09-16 Thread Carl Yaffey

For what it’s worth, check out my setup on QRZ.

Carl Yaffey  K8NU
Recording studio.
cyaffeyno_s...@gmail.com 
614 268 6353, Columbus OH
http://www.carl-yaffey.com
http://www.grassahol.com
http://www.bluesswing.com









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Re: [Elecraft] Analog vs. Digital Front Ends

2015-09-16 Thread Alan


On 09/16/2015 05:25 AM, Joe Subich, W4TV wrote:
...

  N  "S"
--
  1 S9 +63 dB (-10 dBm)
  3 S9 +53 dB
 10 S9 +43 dB
 32 S9 +33 dB
100 S9 +23 dB
316 S9 +13 dB
   ~450 S9 +10 dB
   1000 S9  +3 dB
  ~1400 S9  +0 dB (-73 dBm)

Since it is the instantaneous peaks that cause problems, increasing the
number of signals decreases the frequency of the ADC overflows.  There
is certainly analysis that can be done to compute the probability of a
peak given a specific number of signals and frequency distribution but
my best guess is that the number of signals involved will be somewhere
between 10 and 100.


The amplitude distribution of a large number of signals of different 
frequencies and amplitudes closely approximates Gaussian noise (see note 
1 below).  As a rule of thumb the peak to RMS voltage ratio of Gaussian 
noise is about 5 or 6.  Of course, theoretically it is infinity, but 
peaks over about 5-6 are statistically rare (note 2), so that's a good 
practical rule of thumb.


A voltage ratio of 5-6 is 14-15.6 dB.  ADC overload should be rare as 
long as you keep the RMS power 15 dB or so below the ADC full-scale.


A lot depends on what happens when the ADC overloads.  If it simply 
clips the signal, an occasional brief overload would not be 
objectionable.  That's how the ADC in the P3 works.  On the other hand, 
if it "wraps around" (for example, 0x7FFF = 32767 wraps to 0x8000 = 
minus 32768) then it's obviously much more of a problem.  In that case, 
you would need an external analog clipper to keep the ADC from overloading.


Alan N1AL


Note 1:

The Central Limit Theorem:
https://en.wikipedia.org/wiki/Central_limit_theorem

Note 2:

The cumulative Gaussian probability density function is given in the 
Wikipedia article:


https://en.wikipedia.org/wiki/Normal_distribution#Numerical_approximations_for_the_normal_CDF

If I calculated right then for x=5, CDF = (1 - 3*10^-8).  If the ADC 
sample rate is 100 Msps, then on average there would be 3 overloaded 
samples per second. For x=6, CDF = (1 - 2.8*10^-11) so there would be 
one overload about every 360 seconds.

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Re: [Elecraft] Elecraft SP3 External Speaker details

2015-09-16 Thread Wayne Burdick

Hi Bob,

Here's an expanded list of specs on the SP3:

  Weight:  4 lb, 8.4 oz ( 2.5 kg)

  Speaker Size:  3” x 5” (77 x 127 mm)

  Speaker Impedance:  4 ohms   (note: the K3's internal speaker is also 4 ohms)

  Magnet Type:  Neodymium

  Power Handling Capability:  15 W

  Frequency Response:  100-20,000 Hz

  Sensitivity:  90 dB SPL

I will post a link to the frequency response curve shortly.

Wayne
N6KR



On Sep 16, 2015, at 9:36 AM, Bob  wrote:

> I've made no decision yet on the purchase.
> 
> However I note with interest that the email title says "Speaker details".  
> But this thread has had none other than Wayne's statement of SPL.   I'm 
> curious as to the response curve.  Is it flat or Communications?   I'd be 
> looking for flat as in my opinion the K3 should deliver the desired response  
> and the SP3's job is to just make a faithful reproduction of it
> 
> More technical "details" are needed
> 
> 73,
> Bob
> K2TK  ex KN2TKR (1956) & K2TKR



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[Elecraft] Digital Modes and K3S

2015-09-16 Thread KE1B


I had this working, but now can’t figure out how I did it, cuz it’s not working 
again.

Running Windows 7, N1MM+, K3S connected via USB.

CW and SSB work fine, including macros.

On RTTY (MMTTY), if I hit any macro key, the radio keys up (PTT), but there is 
no diddling. At that time, I see the characters being sent in the Digital 
Window, and the XY scope is apparently showing my transmitted signal. I just 
get a pure carrier.

On PSK (MMVARI), if I hit a macro key, the radio keys up (PTT), and the 
characters show up in the Digital Window, but again there is apparently no 
audio getting from the computer to the radio.

In the Configurer, I have selected the K3S Codec as the output device for the 
radio.

I have tried lots of variations in ports and AFSK/FSK and such, to no avail. 
What should I be checking?

Rich KE1B
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Re: [Elecraft] Elecraft SP3 External Speaker details

2015-09-16 Thread Wayne Burdick

Hi Keith,

This all seemed pretty simple on our end:

- We've been asked a gazillion times for a matching speaker

- We worked with a speaker design expert to do the acoustic design,
  adding a versatile mono/stereo A/B switch for station integration

- We kept the price as low as we possible could, given the high parts cost
  for a rugged, all-metal enclosure w/tilt stand that matches the K-Line
  (and would be suitable for space-saving DIY built-ins like a 12-V UPS)

The result is the SP3. I wish we could price it like a pair of typical 
medium-power entertainment speakers, but that isn't possible given the 
packaging requirements.

So, yeahthe volume of traffic on this subject is a bit surprising. 

Yet, just as a volcano must erupt periodically to release tensions beneath the 
surface, so must an email forum periodically bubble and froth to satiate its 
hunger for intrigue and controversy ;)

Wayne
N6KR



On Sep 16, 2015, at 10:55 AM, Terry Schieler  wrote:

> I'm guessing that Eric is looking at Wayne, OR, Wayne is looking at Eric 
> right now and saying "SEE.I told you so".  ;o)
> 
> Terry W0FM
> 
> -Original Message-
> From: Alan [mailto:n...@sonic.net] 
> Sent: Tuesday, September 15, 2015 10:06 PM
> To: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] Elecraft SP3 External Speaker details
> 
> On 09/15/2015 07:17 PM, Fred Jensen wrote:
>> I am truly stunned that a simple speaker could generate this much 
>> interest. :-)



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Re: [Elecraft] K2 mic compatibility?

2015-09-16 Thread Don Wilhelm


Frank,

Unfortunately, the mic plug wiring is different than that for the MH2.
Can I assume that it is one of Heil's microphones that use an adapter?  
If so, replace the adapter with the one used for Kenwood (red band).
Since it is an Icom microphone, it likely needs bias, so the resistor 
added to the back of the K2 microphone jack can stay in place.


73,
Don W3FPR

On 9/16/2015 1:35 PM, kg9hfr...@gmail.com wrote:

Hi folks,

I have just been handed a Heil mic wired for 8 pin Icom.

Anyone know if the Icom 8pin is pin for pin compatible with a K2 that is wired 
for an MH-2?

Not that I need another mic as I am a CW guy but… I have been on SSB since Don 
aligned it and was wondering if I can “just plug it in”.




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Re: [Elecraft] Station setup

2015-09-16 Thread Jim Hooper

Dennis, 

My desktop height is 27”, a couple of inches lower than standard.   It is an 
L-shaped Ikea work table, 30" x 60” for the main top, with some height 
adjustability. 

Personally, I find that the lower table top height helps me when typing, 
particularly, which I do all the time with my logging programs.   And maybe it 
is better, too, for CW keying, though I am a CW neophyte.   Ergonomic 
guidelines are available in many spots on the web, and I wanted to be 
comfortable.   My everyday computer and my radio are on the same desk, so I 
spend a lot of time there.   

But you referenced a drawer for “log books and pencils” … so you likely 
hand-write into your log.   Then 29” top height would be better.

And yes, I second other’s thoughts about positioning the table for access from 
the rear.   I moved my table about 18 inches out from the wall and I appreciate 
the improved access just about every day if not at least once a week. 

Your project sounds like you will be creating a work of art. 

73, 
Hoop
K9QJS 
San Juan Island, WA  






On Sep 16, 2015, at 7:50 , Dennis  wrote:

I too am beginning to build a new operating desk for use with a K line and 
several other radios. Woodworking is my other hobby so the desk will be a 
rather involved and lengthy project. Solid woods from one inch to three inch 
thickness will insure strength throughout. The main desktop will be 29 inches 
from the floor, a standard dimension. The top will be 60 inches wide by 30 
inches deep. A two shelve hutch set back 10 inches from the desktop front will 
be separated 10 inches apart with open backs and partially closed sides. A thin 
(2 inch) center drawer below the desktop on the front apron will be 20 inches 
wide to contain log books, pencils and such. The main dimension is the table 
top. I want it large enough to hold two transceivers plus cw paddles 
comfortably with amplifiers located above each on the first hutch shelf. 
Additional receivers will also fit on the first shelf making them an easy reach 
from the chair in the center of the desk. The desk will be a straight front
  design, no wrap around curve. I have found through years of experience that 
building in as much room as possible is the way to go. This desk will go in a 
room corner tight against the walls with a window to the left of this location. 
A dark desk top, black walnut, will need good illumination. Should be a fun 
project. 


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Re: [Elecraft] Analog vs. Digital Front Ends

2015-09-16 Thread Wes (N7WS)

You're talking about matching, not any frequency selectivity of the wire.  
Thousands of guys swear by a so-called G5RV and 43' verticals (I'm not one of 
them), antennas that aren't resonant on any ham band where they're used.  There 
is absolutely no requirement that a wire be resonant to operate efficiently; 
especially on receive, which is the case at hand. Any frequency selectivity is 
due to the matching network, not anything inherent in the piece of wire.



On 9/16/2015 12:19 PM, Rick Stealey wrote:

If I'm using my 40 m dipole and go to 80 meters the signals will jump up 
SIGNIFICANTLY if I switch to my 80 meter antenna.  Several S units.
Same on 20.
So, if instead of a single band 40 m dipole I had a 80/40 fan dipole, wouldn't 
an SDR have to deal with stronger signals in total?
Same as if we were talking about a Steppir vs a trapped tribander on 10-20 
meters.

Rick  K2XT


To:elecraft@mailman.qth.net
From:w...@triconet.org
Date: Wed, 16 Sep 2015 08:21:03 -0700
Subject: Re: [Elecraft] Analog vs. Digital Front Ends

I'm having a hard time understanding where the frequency selectivity of a piece
of wire comes from.

On 9/16/2015 6:13 AM, Rick Stealey wrote:

And Joe presented a very useful tabulation showing how signals combine.
One thing that we should keep in mind is that single band antennas like 
Steppirs, single band dipoles, etc. greatly attenuate out of band signals.  And 
from Joe's data look what a difference 10-20 db can make.  This might be a good 
case against 80/40  fan dipoles and trap tribanders.
Rick  K2XT  



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Re: [Elecraft] K3 / K3S Station setup question

2015-09-16 Thread Edward R Cole

When we moved to our current home in 2006, my ham stations and 
outside antenna took a primary consideration in even deciding on 
which property to choose.  My nine sled dogs were the other primary 
consideration. We moved from a 5ac lot to 1-3/4ac of which about 1ac 
is not woods.  But moving out of a 1955 owner-built house to a modern 
1994 5-star energy home was a good move.  In 1955 the area was 
wilderness and homesteads and nearly roadless.  We now live on a lake.


My ham shack occupies the 3rd bedroom and is about 11x12 foot.  I 
arranged the two 6-foot folding table in a L-configuration with about 
30-inch space between one table and the closet.  The closet became a 
bookshelf.  The other table backs to the wall and only window and I 
have to racks at right angle to the other end of that table so the 
station forms a U.  On the fourth wall is my workbench for electronic 
assembly.  Pretty crowded, now.  But leaving the table with space 
behind holding all the radio equipment makes cable work easier.  Thru 
wall cable opening is at the end of the walkspace.  Photos can be 
seen on my website.


My dream shack is a 26 by 18 foot addition to the 2-car garage 
(separate shop) which I will place my metal/wood working tools in the 
front third and shack in back 2/3 with dividing wall between and 
either folding door or pocket door to keep dust from the front area 
getting to the electronics.  This will place the shack facing my 
50-foot eme tower about 40-foot away for shorter cables.  But my dish 
is off the other end of the house so farther cable run.  I need TV 
cams for watching the dish even from the current shack so new shack 
would not be substantially different in operation.


But probably need about $25K or more for the dream shack - so still dreaming!

73, Ed - KL7UW
http://www.kl7uw.com
"Kits made by KL7UW"
Dubus Mag business:
dubus...@gmail.com

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Re: [Elecraft] K3: reverse 12 volt supply

I checked the rolls of wire at the shop.   I find I have two different 
ones:


Belden # 8720 -
14 AWG stranded (19x27) TC conductors, polyethylene insulation, twisted 
pair, overall Beldfoil® shield (100% coverage), 16 AWG stranded TC drain 
wire, PVC jacket.


Belden # 8718 -
12 AWG stranded (19x25) TC conductors, polyethylene insulation, twisted 
pair, overall Beldfoil® shield (100% coverage), 14 AWG stranded TC drain 
wire, PVC jacket.


73
Bob, K4TAX
K3S s/n 10,163


On 9/16/2015 11:20 AM, Richard Fjeld wrote:


Thanks for all the replies with sources to find stranded, paired 
wire.  I saved them all.
My sources suddenly quit. I feared the wire mfg's may have gone 
off-shore, and I might have to use pastel colors (tic).


And finally, FWIW, it seems someone is using my callsign.  If you 
Google it, you will see scores of pictures being posted to it on 
social media sites.  I have had QSL cards in error also.

It not me, folks.

Trashed, or not, I hope to celebrate 40 years with this call next 
year.  I received the ARRL WAS Bi-Centennial certificate in '76 
shortly before receiving this call in the mail.


Thanks for the bandwidth and 73,

Dick, n0ce

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Re: [Elecraft] Digital Modes and K3S


Are you in USB mode or TX Data mode on the radio?

I use TX Data very successfully.  And when I work AFSK I do switch to 
ALT mode which would be LSB mode in TX Data.  Otherwise, TX Data us a 
USB mode.  The nice thing about using TX Data mode is that it negates 
the COMP and EQ values.  When going back to SSB then the COMP and EQ 
values are retained.


73
Bob, K4TAX
K3S s/n 10,163

On 9/16/2015 2:18 PM, KE1B wrote:

I had this working, but now can’t figure out how I did it, cuz it’s not working 
again.

Running Windows 7, N1MM+, K3S connected via USB.

CW and SSB work fine, including macros.

On RTTY (MMTTY), if I hit any macro key, the radio keys up (PTT), but there is 
no diddling. At that time, I see the characters being sent in the Digital 
Window, and the XY scope is apparently showing my transmitted signal. I just 
get a pure carrier.

On PSK (MMVARI), if I hit a macro key, the radio keys up (PTT), and the 
characters show up in the Digital Window, but again there is apparently no 
audio getting from the computer to the radio.

In the Configurer, I have selected the K3S Codec as the output device for the 
radio.

I have tried lots of variations in ports and AFSK/FSK and such, to no avail. 
What should I be checking?

Rich KE1B
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Re: [Elecraft] Analog vs. Digital Front Ends

2015-09-16 Thread Joe Subich, W4TV

On 9/16/2015 2:02 PM, Alan wrote:

The amplitude distribution of a large number of signals of different
frequencies and amplitudes closely approximates Gaussian noise (see
note 1 below). As a rule of thumb the peak to RMS voltage ratio of
Gaussian noise is about 5 or 6. Of course, theoretically it is
infinity, but peaks over about 5-6 are statistically rare (note 2),
so that's a good practical rule of thumb.

We know N > 3 based on NC0B's test with the Flex-6700. 5-6 may be
reasonable if all signals are the same strength but what happens when
a very strong signal (that neighbor half mile away) preloads the ADC?

> A voltage ratio of 5-6 is 14-15.6 dB. ADC overload should be rare as
> long as you keep the RMS power 15 dB or so below the ADC full-scale.

Unfortunately, with practical DDC transceivers like the Flex-6000
series, that 15 dB below ADC full scale does very bad things to
sensitivity. Based on ARRL's April 2015 test, turning off +20 dB
preammp reduces sensitivity (MDS) from -135 dBm to -119 dBm while
the 20 KHz IMDDR3 goes from 94 dB (preamp on) to 103 dB (preamp off).
In practice, the user is faced with a choice between sensitivity and
IMD.

The real issue is that the -10 to -17 dBm clip point for the current
class of DDC devices is simply too low for full performance from MDS
to clipping. Considering that K9ZOA's Norton pre-amplifiers are rated
for *+19 dBm* at the 1 dB compression point, a well designed "analog"
transceiver has nearly 30 dB more headroom (while maintaining full
sensitivity) than the DDC products. This is the issue that the DDC
proponents can't escape (and don't want to address).

73,

... Joe, W4TV

On 9/16/2015 2:02 PM, Alan wrote:

On 09/16/2015 05:25 AM, Joe Subich, W4TV wrote:
...

N "S"
--
1 S9 +63 dB (-10 dBm)
3 S9 +53 dB
10 S9 +43 dB
32 S9 +33 dB
100 S9 +23 dB
316 S9 +13 dB
~450 S9 +10 dB
1000 S9 +3 dB
~1400 S9 +0 dB (-73 dBm)

Since it is the instantaneous peaks that cause problems, increasing the
number of signals decreases the frequency of the ADC overflows. There
is certainly analysis that can be done to compute the probability of a
peak given a specific number of signals and frequency distribution but
my best guess is that the number of signals involved will be somewhere
between 10 and 100.

The amplitude distribution of a large number of signals of different
frequencies and amplitudes closely approximates Gaussian noise (see note
1 below). As a rule of thumb the peak to RMS voltage ratio of Gaussian
noise is about 5 or 6. Of course, theoretically it is infinity, but
peaks over about 5-6 are statistically rare (note 2), so that's a good
practical rule of thumb.

A voltage ratio of 5-6 is 14-15.6 dB. ADC overload should be rare as
long as you keep the RMS power 15 dB or so below the ADC full-scale.

A lot depends on what happens when the ADC overloads. If it simply
clips the signal, an occasional brief overload would not be
objectionable. That's how the ADC in the P3 works. On the other hand,
if it "wraps around" (for example, 0x7FFF = 32767 wraps to 0x8000 =
minus 32768) then it's obviously much more of a problem. In that case,
you would need an external analog clipper to keep the ADC from overloading.

Alan N1AL

Note 1:

The Central Limit Theorem:
https://en.wikipedia.org/wiki/Central_limit_theorem

Note 2:

The cumulative Gaussian probability density function is given in the
Wikipedia article:

https://en.wikipedia.org/wiki/Normal_distribution#Numerical_approximations_for_the_normal_CDF

If I calculated right then for x=5, CDF = (1 - 3*10^-8). If the ADC
sample rate is 100 Msps, then on average there would be 3 overloaded
samples per second. For x=6, CDF = (1 - 2.8*10^-11) so there would be
one overload about every 360 seconds.
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Re: [Elecraft] Analog vs. Digital Front Ends

As a side note on this topic,  there is a company in Tennessee that 
builds some really nice specialty receivers for various Governments.  
{notice I stated Governments, as in plural}.They also have built or 
build ham radios such as the Orion, Orion II, Omni VII, Eagle, Argonaut 
VI just to name a few.  Many of the technologies from the commercial 
products are spun off into the ham products.


73
Bob, K4TAX
K3S s/n 10,163

On 9/16/2015 9:59 AM, Jim Bolit wrote:

Interesting.
The government is a big driver for wide range receive capabilities / signal 
analysis, but cost is not the main driver there.
Jim
W6AIM





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Re: [Elecraft] K3: reverse 12 volt supply

2015-09-16 Thread Mel Farrer via Elecraft

Here is where I got my color coded heavy wire.  Marine Wire | Marine Electrical 
| West Marine

|   |
|   |   |   |   |   |
| Marine Wire | Marine Electrical | West MarineEmail Us Shipping Information 
International Shopping Returns & Exchanges Customer Service Call (800) 
262-8464Monday-Friday, 8am - 9pm ETSat, 9am - 6pm ET; Sun, Closed  |
|  |
| View on www.westmarine.com | Preview by Yahoo |
|  |
|   |



I am sure other marine supply houses do also.
Mel, K6KBE

  From: Bob McGraw - K4TAX 
 To: elecraft@mailman.qth.net 
 Sent: Wednesday, September 16, 2015 1:49 PM
 Subject: Re: [Elecraft] K3: reverse 12 volt supply
   
I checked the rolls of wire at the shop.  I find I have two different 
ones:

Belden # 8720 -
14 AWG stranded (19x27) TC conductors, polyethylene insulation, twisted 
pair, overall Beldfoil® shield (100% coverage), 16 AWG stranded TC drain 
wire, PVC jacket.

Belden # 8718 -
12 AWG stranded (19x25) TC conductors, polyethylene insulation, twisted 
pair, overall Beldfoil® shield (100% coverage), 14 AWG stranded TC drain 
wire, PVC jacket.

73
Bob, K4TAX
K3S s/n 10,163


On 9/16/2015 11:20 AM, Richard Fjeld wrote:
>
> Thanks for all the replies with sources to find stranded, paired 
> wire.  I saved them all.
> My sources suddenly quit. I feared the wire mfg's may have gone 
> off-shore, and I might have to use pastel colors (tic).
>
> And finally, FWIW, it seems someone is using my callsign.  If you 
> Google it, you will see scores of pictures being posted to it on 
> social media sites.  I have had QSL cards in error also.
> It not me, folks.
>
> Trashed, or not, I hope to celebrate 40 years with this call next 
> year.  I received the ARRL WAS Bi-Centennial certificate in '76 
> shortly before receiving this call in the mail.
>
> Thanks for the bandwidth and 73,
>
> Dick, n0ce
>
> __
>


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Re: [Elecraft] Analog vs. Digital Front Ends

2015-09-16 Thread Al Lorona

This is really good information, Alan, and makes sense. Regarding the 
approximation to Gaussian noise... given that most signals on a crowded band 
during a contest are highly compressed (their peak-to-average ratios are much 
smaller) would this make matters better or worse for the ADC, or no difference? 
I think I read that some signals during a contest have PAR's of 1 dB.
Al  W6LX


> As a rule of thumb the peak to RMS voltage ratio of Gaussian 
> noise is about 5 or 6, or 14-15.6 dB.
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Re: [Elecraft] Analog vs. Digital Front Ends

2015-09-16 Thread Alan


Hi Al,

The Central Limit Theorem says that it doesn't matter what the 
distribution function is for each individual signal.  As long as there 
are a lot of them, the total has a Gaussian distribution.  In fact, it 
doesn't take very many to get quite close to Gaussian - something like 4 
to 6 is generally sufficient if they are roughly equal in amplitude and 
uncorrelated (different frequencies).


Alan N1AL


On 09/16/2015 02:26 PM, Al Lorona wrote:

This is really good information, Alan, and makes sense. Regarding the
approximation to Gaussian noise... given that most signals on a
crowded band during a contest are highly compressed (their
peak-to-average ratios are much smaller) would this make matters
better or worse for the ADC, or no difference? I think I read that
some signals during a contest have PAR's of 1 dB. Al  W6LX



As a rule of thumb the peak to RMS voltage ratio of Gaussian noise
is about 5 or 6, or 14-15.6 dB.



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[Elecraft] K3 still for sale

2015-09-16 Thread Tim Tucker

K3 #4519 is still for sale.  It is configured as follows:

-100 watts
-ATU
-General Coverage RX module
-2.1 Khz 8 pole filter
-2.8 Khz 8 pole filter
-400 Hz 8 pole filter
- 6 Khz 8 pole filter
-13 Khz FM B/W filter
-TCXO
-KXV3A Rx Ant, IF Out & Xverter interface
-PR6-10 Preamp

This configuration would run over $4K new; I'm looking for $3000 shipped
for everything.

If you don't want the extra filters, general RX, or TCXO, I'll pull them
out and we can make a deal that doesn't include them.

Tim
AE6LX


-- 
Owner, worldwidedx.com
AE6LX, Amateur Radio
AAR9GA, Army MARS
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Re: [Elecraft] On VHF & UHF radios

I'm using external transverters for 2M, 70cm and 23cm, those being 
DownEast Microwave, driving a IPA to the PA.  Yes, I think working EME 
is considered as weak signal work.  Plus I use a mast mounted preamps 
with separate TX and RX lines.  Makes for switching and sequencing to be 
less complex.


73
Bob, K4TAX
K3S s/n 10,163

On 9/16/2015 6:52 PM, Jim Lowman wrote:

That could be, Bob.

I should have phrased my question more specifically.
My intended use for such a transceiver would be weak-signal work.

I had the 2m option for the K3 but, with its low power output, I sold 
it and bought a Kenwood TS-2000X to be dedicated to VHF/UHF operation.
However, this type of operation demands high power (at least 100w) and 
an antenna with high gain, so I would have to buy an external 
amplifier at any rate.

Thus, I might re-think the 2m option from Elecraft.
It's a bonus that The K3(S) can handle up to nine transverters.

At a convention way back in 2001, I became interested in working the 
satellites and bought a Yaesu FT-847.
The interest waned eventually, so I sold the 847 toward the purchase 
of the TS-2000X.


And no, I don't plan to use the TS-2000X on HF; not when I have a K3 
and a K3S.


73 de Jim - AD6CW





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Re: [Elecraft] DXE Receiver Guard

2015-09-16 Thread Don Wilhelm


Ian,

That all depends.
There is no one answer, because it depends on how much energy from the 
other transmitters is going to be picked up by your RX antenna.
If it enough to operate the COR (you will hear the relay clicking), then 
you should provide some protection.


Providing that protection without actually setting up the proposed Field 
Day antennas and transmitters and experimenting is the 'safe' way to do it.
If you prefer not to do that, I would suggest you do set up a "practice 
Field Day" with the antennas and transmitters as they will be for the 
actual Field Day and try it out using all combinations of bands, 
transmitters and antennas that you plan to use.


There may be simulation programs that will tell you how much RF energy 
is coupled from one antenna to another, but I don't know what those 
programs might be.


73,
Don W3FPR

On 9/16/2015 9:45 PM, Ian wrote:

I don't anticipate using a RX antenna any time soon on my K3S but I will use
it at Field Day with 5-4 other 100W transmitters.  Any reason to use a
DXE-RG-5000 front-end protection device across the RX-IN and RX-out ports?
Or is there sufficient internal protection?




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[Elecraft] DXE Receiver Guard

2015-09-16 Thread Ian

I don't anticipate using a RX antenna any time soon on my K3S but I will use
it at Field Day with 5-4 other 100W transmitters.  Any reason to use a
DXE-RG-5000 front-end protection device across the RX-IN and RX-out ports?
Or is there sufficient internal protection?

73, Ian N8IK

 

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Re: [Elecraft] Analog vs. Digital Front Ends

2015-09-16 Thread Alan


On 09/16/2015 01:15 PM, Joe Subich, W4TV wrote:

On 9/16/2015 2:02 PM, Alan wrote:

The amplitude distribution of a large number of signals of different
frequencies and amplitudes closely approximates Gaussian noise (see
note 1 below). As a rule of thumb the peak to RMS voltage ratio of
Gaussian noise is about 5 or 6. Of course, theoretically it is
infinity, but peaks over about 5-6 are statistically rare (note 2),
so that's a good practical rule of thumb.


We know N > 3 based on NC0B's test with the Flex-6700.  5-6 may be
reasonable if all signals are the same strength but what happens when
a very strong signal (that neighbor half mile away) preloads the ADC?


In that case the peak to RMS ratio actually gets less.  In the limit 
where the strong signal is much greater than the rest, the ratio 
approaches 0 dB.


...

The real issue is that the -10 to -17 dBm clip point for the current
class of DDC devices is simply too low for full performance from MDS
to clipping.


Yes, the blocking dynamic range of direct-sampling receivers using 
current state-of-the-art ADCs is 15-20 dB worse than a top superhet 
receiver like a K3.  In addition to that, the "soft clipping" of the 
analog circuitry probably gives some additional advantage to the superhet.


On the other hand, for casual operation you don't really need all that 
dynamic range anyway.  A QRP rig based on a NE602 has horrible dynamic 
range, but you can still make a lot of contacts with it and have a lot 
of fun.  (For a lot less money.  :=)


Alan N1AL

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Re: [Elecraft] On VHF & UHF radios

2015-09-16 Thread Jim Lowman


That could be, Bob.

I should have phrased my question more specifically.
My intended use for such a transceiver would be weak-signal work.

I had the 2m option for the K3 but, with its low power output, I sold it 
and bought a Kenwood TS-2000X to be dedicated to VHF/UHF operation.
However, this type of operation demands high power (at least 100w) and 
an antenna with high gain, so I would have to buy an external amplifier 
at any rate.

Thus, I might re-think the 2m option from Elecraft.
It's a bonus that The K3(S) can handle up to nine transverters.

At a convention way back in 2001, I became interested in working the 
satellites and bought a Yaesu FT-847.
The interest waned eventually, so I sold the 847 toward the purchase of 
the TS-2000X.


And no, I don't plan to use the TS-2000X on HF; not when I have a K3 and 
a K3S.


73 de Jim - AD6CW

On 9/16/2015 5:03 AM, Bob McGraw - K4TAX wrote:
I don't view there are many serious VHF and UHF operators today, i.e. 
sufficient to warrant a high performance radio.  Most are repeater 
users.  Seems that a $39 radio model has been proven to be 
satisfactory to most.


The SAT users do require some unique applications to cross band, split 
frequency and address Doppler shift.  The Tropo users need big 
antennas and lots of power and the EME group even more so.  Oh yes, 
the digital modes make things less complex but still, big antennas, 
good receivers and clean transmitters is still mandatory.


I don't find the current breed of "do it all" radios to have 
outstanding performance on VHF and UHF.


73
Bob, K4TAX
K3S s/n 10,163



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[Elecraft] KPA500 (S/N 82) Power Out Problem....

2015-09-16 Thread W5RDW

Last night, I turned on my K3/KAT500/KPA500 as normal and upon CW key up, all
the Power (W) LEDs lit up across the scale. The Fault LED was not lit. The
VSWR was good. The KPA500 reads 640 watts ?? Pout with nominal drive power
(15 watts) from the K3. The CUR is not reading any current. This happens on
all bands 160 to 6M. All was working yesterday with no problems. I took the
KAT500 out of the chain and ran the K3 directly into the amp input and then
the amp output into a high power dummy load/watt meter. I only read the K3
nominal power out (set to 15 watts) on the watt meter. 

I re-seated all the cables between the rig/tuner/PA. Has anyone experienced
this on their KPA500?

Roger W5RDW
Murphy, TX




-
Roger W5RDW
--
View this message in context: 
http://elecraft.365791.n2.nabble.com/KPA500-S-N-82-Power-Out-Problem-tp7607839.html
Sent from the Elecraft mailing list archive at Nabble.com.
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[Elecraft] Fw: Re: On VHF & UHF radios

2015-09-16 Thread riese-k3djc



Subject: Re: [Elecraft] On VHF & UHF radios

I added the 2 meter option for the KX3
and I was impressed with the ability to handle
out of band pagers etc. I live next to a hospital and there , usually
dirty 
pagers etx cause problems with other 144 gear I have but the KX3 combo 
really handles the strong 149/150 Mhz signals ,,, could use external amp
for ssb but there pretty common and EZ to home brew

Bob K3DJC

On Wed, 16 Sep 2015 16:52:58 -0700 Jim Lowman 
writes:
> That could be, Bob.
> 
> I should have phrased my question more specifically.
> My intended use for such a transceiver would be weak-signal work.
> 
> I had the 2m option for the K3 but, with its low power output, I 
> sold it 
> and bought a Kenwood TS-2000X to be dedicated to VHF/UHF operation.
> However, this type of operation demands high power (at least 100w) 
> and 
> an antenna with high gain, so I would have to buy an external 
> amplifier 
> at any rate.

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Re: [Elecraft] KPA500 (S/N 82) Power Out Problem....

2015-09-16 Thread Eric Swartz - WA6HHQ, Elecraft

Did you mistakenly turn on demo mode in the menu?

Eric
elecraft.com
_..._



> On Sep 16, 2015, at 5:14 PM, W5RDW  wrote:
> 
> Last night, I turned on my K3/KAT500/KPA500 as normal and upon CW key up, all
> the Power (W) LEDs lit up across the scale. The Fault LED was not lit. The
> VSWR was good. The KPA500 reads 640 watts ?? Pout with nominal drive power
> (15 watts) from the K3. The CUR is not reading any current. This happens on
> all bands 160 to 6M. All was working yesterday with no problems. I took the
> KAT500 out of the chain and ran the K3 directly into the amp input and then
> the amp output into a high power dummy load/watt meter. I only read the K3
> nominal power out (set to 15 watts) on the watt meter. 
> 
> I re-seated all the cables between the rig/tuner/PA. Has anyone experienced
> this on their KPA500?
> 
> Roger W5RDW
> Murphy, TX
> 
> 
> 
> 
> -
> Roger W5RDW
> --
> View this message in context: 
> http://elecraft.365791.n2.nabble.com/KPA500-S-N-82-Power-Out-Problem-tp7607839.html
> Sent from the Elecraft mailing list archive at Nabble.com.
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> Message delivered to eric.swa...@elecraft.com
> 
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[Elecraft] Ham Shack Arrangements - just a little OT

2015-09-16 Thread Dauer, Edward

This discussion of shack and desk arrangements inspired me to look further
into it . . .   Well, not too much further.  I simply went to Google
Images and entered ³Amateur Radio Stations.²  Some Elecraft-centered
setups appeared, as one might imagine.  But here¹s one that just blew me
away:  
https://stationproject.files.wordpress.com/2013/09/george-w9evts-shack.jpg.
  There is even more on the W9EVT QRZ.com entry, and its links.  Note,
however, how much woodworking would have to be done to fit in one more
speaker.

I have heard it said that He Who Dies With the Most Toys Wins.  So far as
I can tell George is still active and well, and may that long be so.  But
would this be the pole position contender?

Ted, KN1CBR

>Message: 7
>Date: Wed, 16 Sep 2015 14:41:26 -0400
>From: Mike Reublin NF4L 
>To: Jim Brown 
>Cc: Elecraft List 
>Subject: Re: [Elecraft] Station setup
>Message-ID: <335568ea-71c7-4be8-aad5-3a99186a3...@comcast.net>
>Content-Type: text/plain; charset=us-ascii
>
>Unless there's a real space issue, forego the wheels ans just put the
>desk a couple of feet from the wall. KISS
>8-{o}.
>
>73, Mike NF4L
>
>
>> On Sep 16, 2015, at 1:15 PM, Jim Brown 
>>wrote:
>> 
>> On Wed,9/16/2015 7:50 AM, Dennis wrote:
>>> This desk will go in a room corner tight against the walls with a
>>>window to the left of this location.
>> 
>> Make sure that it moves, so that you can get behind it to hook up gear.
>>If you can't get behind it, hookups are a PITA, and wiring can quickly
>>become a mess. It also makes it difficult to reconfigure your station.
>>Ask me how I know. :)
>> 
>> Also make sure that you have easy cable paths between levels, and
>>between the desk and antenna entry, and for power.
>> 
>> 73, Jim K9YC

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Re: [Elecraft] Station setup

2015-09-16 Thread Jim Lowman


I wish I had the woodworking skills that some of you have.

Truth be known, I barely squeaked a "C" in woodshop class in 7th grade.

73 de Jim - AD6CW

On 9/16/2015 7:50 AM, Dennis wrote:

I too am beginning to build a new operating desk for use with a K line and 
several other radios. Woodworking is my other hobby so the desk will be a 
rather involved and lengthy project. Solid woods from one inch to three inch 
thickness will insure strength throughout. The main desktop will be 29 inches 
from the floor, a standard dimension. The top will be 60 inches wide by 30 
inches deep. A two shelve hutch set back 10 inches from the desktop front will 
be separated 10 inches apart with open backs and partially closed sides. A thin 
(2 inch) center drawer below the desktop on the front apron will be 20 inches 
wide to contain log books, pencils and such. The main dimension is the table 
top. I want it large enough to hold two transceivers plus cw paddles 
comfortably with amplifiers located above each on the first hutch shelf. 
Additional receivers will also fit on the first shelf making them an easy reach 
from the chair in the center of the desk. The desk will be a straight fro

nt

design, no wrap around curve. I have found through years of experience that 
building in as much room as possible is the way to go. This desk will go in a 
room corner tight against the walls with a window to the left of this location. 
A dark desk top, black walnut, will need good illumination. Should be a fun 
project.




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Re: [Elecraft] Ham Shack Arrangements - just a little OT

2015-09-16 Thread Gary K9GS


W9EVT attended the W9DXCC convention in Chicago this past weekend.



On 9/16/2015 10:10 PM, Dauer, Edward wrote:

This discussion of shack and desk arrangements inspired me to look further
into it . . .   Well, not too much further.  I simply went to Google
Images and entered ³Amateur Radio Stations.²  Some Elecraft-centered
setups appeared, as one might imagine.  But here¹s one that just blew me
away:
https://stationproject.files.wordpress.com/2013/09/george-w9evts-shack.jpg.
   There is even more on the W9EVT QRZ.com entry, and its links.  Note,
however, how much woodworking would have to be done to fit in one more
speaker.

I have heard it said that He Who Dies With the Most Toys Wins.  So far as
I can tell George is still active and well, and may that long be so.  But
would this be the pole position contender?

Ted, KN1CBR



Message: 7
Date: Wed, 16 Sep 2015 14:41:26 -0400
From: Mike Reublin NF4L 
To: Jim Brown 
Cc: Elecraft List 
Subject: Re: [Elecraft] Station setup
Message-ID: <335568ea-71c7-4be8-aad5-3a99186a3...@comcast.net>
Content-Type: text/plain; charset=us-ascii

Unless there's a real space issue, forego the wheels ans just put the
desk a couple of feet from the wall. KISS
8-{o}.

73, Mike NF4L



On Sep 16, 2015, at 1:15 PM, Jim Brown 
wrote:

On Wed,9/16/2015 7:50 AM, Dennis wrote:

This desk will go in a room corner tight against the walls with a
window to the left of this location.

Make sure that it moves, so that you can get behind it to hook up gear.
If you can't get behind it, hookups are a PITA, and wiring can quickly
become a mess. It also makes it difficult to reconfigure your station.
Ask me how I know. :)

Also make sure that you have easy cable paths between levels, and
between the desk and antenna entry, and for power.

73, Jim K9YC

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--
73,

Gary K9GS

Greater Milwaukee DX Association: http://www.gmdxa.org
Society of Midwest Contesters: http://www.w9smc.com
CW Ops #1032   http://www.cwops.org



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Re: [Elecraft] Digital Modes and K3S


On Wed,9/16/2015 2:20 PM, Bob McGraw - K4TAX wrote:
Are you in USB mode or TX Data mode on the radio? 


Rich is talking about RTTY, which the K3 transmits LSB. On Elecraft 
radios, use AFSK-A or FSK-D for RTTY, which, I believe, also bypasses 
the COMP, and sets EQ to a fixed high pass filter with a cutoff in the 
range of 300 Hz.


For all other data modes, use DATA-A, which puts you in USB mode, with 
COMP off and EQ bypassed or in HPF mode.


Also, the K3 runs ALL digital modes including RTTY just fine with VOX. 
I've never used FSK or PTT. Simplifies things a lot.


Rich -- have you turned on the MON so you can hear the audio fed to the 
TX? Do you hear anything? Are you using VOX or PTT? If VOX, play with 
VOX GAIN (single push menu) and audio gain (in all digital modes, the 
Mic Gain becomes Line In gain).


Do you see any indication of ALC? You should, and 4-5 bars is where you 
want to be. Crank VOX and Line In gain. I've got K3s, not K3S, so can't 
help with USB issues. BUT -- is it possible Windoze is messing with your 
USB port assignments and/or audio switching?


OH -- one other thought. RTTY Baud rate must match in the radio and the 
computer. Long Push the AFX knob (Data Mode) to see and cycle through 
the RTTY rates.


These are all things I've had happen to me. :)

73, Jim K9YC


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Re: [Elecraft] Digital Modes and K3S

2015-09-16 Thread Steve Lund

I had a few similar problems when starting up my new Win7Pro PC today.

Check to make sure that the Mark frequency is the same on the K3 and MMTTY.
The defaults are not the same. And make sure that the TX Mark frequency is
the same as the RX frequency.

If you are using VOX make sure that it is on - got caught by that one.

Make sure that the PC line out is not muted.

Steve, K6UM


On Thu, Sep 17, 2015 at 2:05 AM, Jim Brown 
wrote:

> On Wed,9/16/2015 2:20 PM, Bob McGraw - K4TAX wrote:
>
>> Are you in USB mode or TX Data mode on the radio?
>>
>
> Rich is talking about RTTY, which the K3 transmits LSB. On Elecraft
> radios, use AFSK-A or FSK-D for RTTY, which, I believe, also bypasses the
> COMP, and sets EQ to a fixed high pass filter with a cutoff in the range of
> 300 Hz.
>
> For all other data modes, use DATA-A, which puts you in USB mode, with
> COMP off and EQ bypassed or in HPF mode.
>
> Also, the K3 runs ALL digital modes including RTTY just fine with VOX.
> I've never used FSK or PTT. Simplifies things a lot.
>
> Rich -- have you turned on the MON so you can hear the audio fed to the
> TX? Do you hear anything? Are you using VOX or PTT? If VOX, play with VOX
> GAIN (single push menu) and audio gain (in all digital modes, the Mic Gain
> becomes Line In gain).
>
> Do you see any indication of ALC? You should, and 4-5 bars is where you
> want to be. Crank VOX and Line In gain. I've got K3s, not K3S, so can't
> help with USB issues. BUT -- is it possible Windoze is messing with your
> USB port assignments and/or audio switching?
>
> OH -- one other thought. RTTY Baud rate must match in the radio and the
> computer. Long Push the AFX knob (Data Mode) to see and cycle through the
> RTTY rates.
>
> These are all things I've had happen to me. :)
>
> 73, Jim K9YC
>
>
>
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Re: [Elecraft] KPA500 (S/N 82) Power Out Problem....

2015-09-16 Thread W5RDW

>Did you mistakenly turn on demo mode in the menu?

>Eric
>elecraft.com 


Yep, sure did and that fixed it! Many thanks, Eric!

Now, a good nights sleep! :) 



-
Roger W5RDW
--
View this message in context: 
http://elecraft.365791.n2.nabble.com/KPA500-S-N-82-Power-Out-Problem-tp7607839p7607851.html
Sent from the Elecraft mailing list archive at Nabble.com.
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[Elecraft] WTB KDVR3

2015-09-16 Thread Mike Wetzel

Looking for a KDVR3 for one of my K3's.   Reply direct to QRZ.com address.

 

Thanks

 

Mike W9RE

 

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Re: [Elecraft] On VHF & UHF radios


On Wed,9/16/2015 4:52 PM, Jim Lowman wrote:
I had the 2m option for the K3 but, with its low power output, I sold 
it and bought a Kenwood TS-2000X to be dedicated to VHF/UHF operation. 


That was a bad move. Check the specs on the TS2000X. The K3 has has far 
better RX specs, and is probably cleaner on TX.


All you need to add to a K3 with 2M transverter is a suitable power amp. 
Look for a vintage ('70s-'80s) Mirage or RF Concepts brick that drives 
to about 150W with 2W or 10W drive. A year or so ago, I found two of 
each just by asking on the reflectors of a couple of local ham clubs. I 
kept one of each and gave the others to a friend.


I really appreciate the K3 RX while working weak signal CW and digital 
modes on VHF. I'm using a vintage Elecraft 2M transverter that I bought 
more than 10 years ago.


73, Jim K9YC
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Re: [Elecraft] Digital Modes and K3S


On Wed,9/16/2015 8:45 PM, Steve Lund wrote:

Check to make sure that the Mark frequency is the same on the K3 and MMTTY.
The defaults are not the same. And make sure that the TX Mark frequency is
the same as the RX frequency.


YES!  That's a BIG one. If the K3 tones are not the same as the MMTTY 
tones, it will not TX.


I don't use MMVARI, but MMTTY has two .ini files that try very hard to 
set your tones to the 2125 pair. I like low tones. To beat that, you 
need to go into the directories where MMTTY is running, find those .ini 
files (plain text) and change all the default tones to what you want to 
use. The two files are mmtty.ini and userpara.ini   The statements 
you're looking for are DefMarkFreq=2.125000e+03  It occurs about 10 
times in userpara.ini, only once in mmtty.ini  userpara.ini is the file 
that defines the many decoding options; when you cycle through them, all 
of those parameters, including the tone frequencies, gets reset.


If you have multiple instances of MMTTY, you need to edit these files in 
each directory.


73, Jim K9YC



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Re: [Elecraft] Elecraft SP3 External Speaker details

2015-09-16 Thread Terry Schieler

I'm guessing that Eric is looking at Wayne, OR, Wayne is looking at Eric right 
now and saying "SEE.I told you so".  ;o)

Terry W0FM

-Original Message-
From: Alan [mailto:n...@sonic.net] 
Sent: Tuesday, September 15, 2015 10:06 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Elecraft SP3 External Speaker details

On 09/15/2015 07:17 PM, Fred Jensen wrote:
> I am truly stunned that a simple speaker could generate this much 
> interest. :-)


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[Elecraft] K3S - The BBT just left a present on my front porch

2015-09-16 Thread Jerry Moore

And thus the journey begins...

:)

Jerry Moore
AE4PB, K3S SN- inside the box

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Re: [Elecraft] Station setup


On Wed,9/16/2015 7:50 AM, Dennis wrote:

This desk will go in a room corner tight against the walls with a window to the 
left of this location.


Make sure that it moves, so that you can get behind it to hook up gear. 
If you can't get behind it, hookups are a PITA, and wiring can quickly 
become a mess. It also makes it difficult to reconfigure your station. 
Ask me how I know. :)


Also make sure that you have easy cable paths between levels, and 
between the desk and antenna entry, and for power.


73, Jim K9YC
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Re: [Elecraft] Analog vs. Digital Front Ends

2015-09-16 Thread riese-k3djc

http://www.radio-electronics.com/info/antennas/basics/resonance.php


BOB k3djc
On Wed, 16 Sep 2015 08:21:03 -0700 "Wes (N7WS)" 
writes:
> I'm having a hard time understanding where the frequency selectivity 
> of a piece 
> of wire comes from.
> 
> On 9/16/2015 6:13 AM, Rick Stealey wrote:
> > And Joe presented a very useful tabulation showing how signals 
> combine.
> > One thing that we should keep in mind is that single band antennas 
> like Steppirs, single band dipoles, etc. greatly attenuate out of 
> band signals.  And from Joe's data look what a difference 10-20 db 
> can make.  This might be a good case against 80/40  fan dipoles and 
> trap tribanders.
> > Rick  K2XT 
> > _
> 
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Re: [Elecraft] Analog vs. Digital Front Ends