Bill, W4ZV wrote:
"Guy, K2AV wrote:
>
> If one wants to dig up the research...
>
http://www.audioholics.com/education/acoustics-principles/human-hearing-amplitude-sensitivity-part-1
"Speaking now in terms of dB SPL, the minimum discernable changes by the
human ear/brain mechanism I've seen in th
Guy, K2AV wrote:
>
> If one wants to dig up the research...
>
http://www.audioholics.com/education/acoustics-principles/human-hearing-amplitude-sensitivity-part-1
"Speaking now in terms of dB SPL, the minimum discernable changes by the
human ear/brain mechanism I've seen in the research that
ill
> K9YEQ
> K2-#35 (2 more), KX1-#35, K3, TS2000, IC7000, etc.
>
>
>
>
>> From: r...@cobi.biz
>> To: elecraft@mailman.qth.net
>> Date: Fri, 11 Dec 2009 14:16:54 -0800
>> Subject: Re: [Elecraft] [K3] 150 watt "boots" for 160m
>>
>> Quite
judging by the sales of the 480's
in VK there is definitely a market for a 200w PA.
73's
Gary
VK4FD
Sent via BlackBerry® from Telstra
-Original Message-
From: Bill Johnson
Date: Mon, 14 Dec 2009 21:07:24
To:
Subject: Re: [Elecraft] [K3] 150 watt "boots" for 16
did this all
day long for 6 days a week for a year. I know and heard what I write.
Bill
K9YEQ
K2-#35 (2 more), KX1-#35, K3, TS2000, IC7000, etc.
> From: r...@cobi.biz
> To: elecraft@mailman.qth.net
> Date: Fri, 11 Dec 2009 14:16:54 -0800
> Subject: Re: [Elecraft] [K3] 150 watt
did this all
day long for 6 days a week for a year. I know and heard what I write.
Bill
K9YEQ
K2-#35 (2 more), KX1-#35, K3, TS2000, IC7000, etc.
> From: r...@cobi.biz
> To: elecraft@mailman.qth.net
> Date: Fri, 11 Dec 2009 14:16:54 -0800
> Subject: Re: [Elecraft] [K3] 150 watt
Well I ain't neverGrin
Me too, me too, me too
Gary
Sent via BlackBerry® from Telstra
-Original Message-
From: "Dan"
Date: Sat, 12 Dec 2009 13:20:53
To: Bob Maser;
Subject: Re: [Elecraft] [K3] 150 watt "boots" for 160m
I found
"
To: "'Ignacy'" ;
Sent: Friday, December 11, 2009 3:09 PM
Subject: Re: [Elecraft] [K3] 150 watt "boots" for 160m
>
>> 2SC2782 is rated at 80W min each at 175 MHz so getting 150W
>> from two on 1.8 MHz should be peanuts; the main reason why
>>
://www.tnqp.org/
Elecraft K2/100 #4455
Elecraft K3/100 #366
Elecraft K3/100 #1875
--- On Fri, 12/11/09, rfenab...@gmail.com wrote:
> From: rfenab...@gmail.com
> Subject: Re: [Elecraft] [K3] 150 watt "boots" for 160m
> To: "Julius Fazekas n2wn"
> Cc: "Elecraft"
On Fri, 11 Dec 2009 13:58:05 -0800 (PST), Bill W4ZV wrote:
>I'm not sure who said 3 dB was the minimum detectable by a listener but I
>believe it's incorrect. 1 dB "roughly matched the smallest attenuation
>detectable to an average listener".
Yes. I'm a member of the Acoustical Society and work
Duncan,
Yep, I would be instantly poor...again...(:-))
Gary
VK4FD
--Original Message--
From: Duncan Carter
Sender: elecraft-boun...@mailman.qth.net
To: Merv Schweigert
Cc: Elecraft
Subject: Re: [Elecraft] [K3] 150 watt "boots" for 160m
Sent: Dec 12, 2009 6:34 AM
I'd pr
Me too, me too, me too...
More competition...
Dang..(:-))
Gary
VK4FD
Sent via BlackBerry® from Telstra
-Original Message-
From: Julius Fazekas n2wn
Date: Fri, 11 Dec 2009 08:14:05
To:
Subject: Re: [Elecraft] [K3] 150 watt "boots" for 160m
Dang!
Competition ;o)
Crai
category :o)
73,
Julius
n2wn
Brian Moran wrote:
>
> On 160, you could try a class-E amplifier; you're probably not going to
> use anything but CW.
>
>
> --- On Fri, 12/11/09, Edward Dickinson, III
> wrote:
>
>> From: Edward Dickinson, III
>>
At 03:55 PM 12/11/2009 -0700, you wrote:
>Is it really necessary to continue this thread? My inbox is seeing entirely
>too much drivel like this thread and others on this reflector.
>
>Bob W6TR
Hi
I think this is one of the more interesting threads it is certainly on
a par with (with due r
Let's end this thread. :-)
73,
Eric
Elecraft Moderator
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At 09:53 AM 12/11/2009 -1000, you wrote:
>A good article on the value of a DB is an old timer in QST I think it was,
>Station design for DX
>I guarantee you that if you improve your station by 1Db or more you will
>tell the difference, have done it and it works. A whole new layer of DX
>opens up
mproved IMD (-33 dB @ 150 W) and gain
> (>20 dB).
>
> 73,
>
> ... Joe, W4TV
>
>
>> -Original Message-
>> From: elecraft-boun...@mailman.qth.net
>> [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ignacy
>> Sent: Friday, December 11, 2009 4:06 P
un...@mailman.qth.net] On Behalf Of
> Reinaldo Leandro
> Sent: Friday, December 11, 2009 5:10 PM
> To: n...@aiko.com
> Cc: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] [K3] 150 watt "boots" for 160m
>
>
>
>
> Reinaldo Leandro wrote:
> > The
Ron D'Eau Claire wrote:
>
> Quite right Bill, in an audio laboratory or perhaps in a very quiet
> telephone circuit.
>
> But radio communications is different according to what I learned in
> school,
> lo' these many years past. Over half a century ago most radio
> communications
> engineers
Quite right Bill, in an audio laboratory or perhaps in a very quiet
telephone circuit.
But radio communications is different according to what I learned in school,
lo' these many years past. Over half a century ago most radio communications
engineers began using 3 dB (2:1 power ratio) as the mini
Reinaldo Leandro wrote:
> The
> Expert 1KA Italian amplifier with solid state finals needs only 20 watts
> drive for 1000 watts out. In fact, you must be very careful not to
overdrive
> those amplifiers
>
I can't find any reference to this amp after searching. Can you provide
a link? That'd
n.qth.net
> [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Ignacy
> Sent: Friday, December 11, 2009 4:06 PM
> To: elecraft@mailman.qth.net
> Subject: Re: [Elecraft] [K3] 150 watt "boots" for 160m
>
>
>
> Those who believe in authority and that God punishes
>
Since the K3 (like virtually all current rigs) has fixed-tuned output
filters, the match to the finals (and so the efficiency) will degrade as you
go beyond the output power (and so impedance) for which they were designed.
That means more current demand, more heating and perhaps new final
transisto
>From 100 to 150, for 1.7 dB, when Bell Laboratories research (with
huge capital investment and telephone maintenance dollars on the line)
determined that 3 dB was the signal strength change discernment for
most people?
I'm not sure who said 3 dB was the minimum detectable by a listener but I
bel
ow will have 200 watts of output, and why not?
High voltage FETs are cheap readily available, there is no excuse anymore for
having 12 volt PA transistors in any high performance radio.
John
--- On Fri, 12/11/09, Lee Buller wrote:
> From: Lee Buller
> Subject: Re: [Elecraft] [K3]
Guy,
Two db does indeed make a difference no matter what you or the Bell Labs
results say, and that's why the search for an extra db or two continues
for anyone interesting in contesting or DXing in noisy conditions.
A couple of years ago I generated some audio files to demonstrate
exactly th
Those who believe in authority and that God punishes tinkerers, PLEASE SKIP
this message.
2SC2782 is rated at 80W min each at 175 MHz so getting 150W from two on 1.8
MHz should be peanuts; the main reason why they are restricted to 110W in K3
is linearity (across bands) + component ratings. At h
Let me get this right. You are looking for reassurance that money you
haven't spent will be well spent upping 100 to 150 watts. Perhaps
there is some part of you that doesn't believe it, or you would have
done it already? Maybe you should listen to the skeptic there.
Well, if you do go spend it
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Julius Fazekas n2wn
Sent: Friday, December 11, 2009 11:14
To: elecraft@mailman.qth.net
Subject: [Elecraft] [K3] 150 watt "boots" for 160m
Wondering if anyone has a
Vic K2VCO wrote:
>
> Guy Olinger K2AV wrote:
>>>From 100 to 150, for 1.7 dB, when Bell Laboratories research (with
>> huge capital investment and telephone maintenance dollars on the line)
>> determined that 3 dB was the signal strength change discernment for
>> most people?
>>
>> It's amazing
I'd prefer to see the long delayed Elecraft 500 to 1000 watt amplifiers
that have been delayed, apparently because of the intense development of
the K3 which hopefully is nearing an end. An amplifier with QSK, an
internal tuner comparable to the K3 tuner, and integrated with the K3
with Elecra
Thanks Frank!
73
Julius Fazekas
N2WN
Tennessee Contest Group
http://www.k4ro.net/tcg/index.html
http://groups.google.com/group/tcg1?hl=en
Tennessee QSO Party
http://www.tnqp.org/
Elecraft K2/100 #4455
Elecraft K3/100 #366
Elecraft K3/100 #1875
--- On Fri, 12/11/09, w4nhj [via Elecraft]
wrot
00 #1875
--- On Fri, 12/11/09, Lee Buller wrote:
> From: Lee Buller
> Subject: Re: [Elecraft] [K3] 150 watt "boots" for 160m
> To: "Julius Fazekas n2wn"
> Date: Friday, December 11, 2009, 12:52 PM
>
> In all seriousness
>
> I don't think I
On 160, you could try a class-E amplifier; you're probably not going to use
anything but CW.
--- On Fri, 12/11/09, Edward Dickinson, III wrote:
> From: Edward Dickinson, III
> Subject: Re: [Elecraft] [K3] 150 watt "boots" for 160m
> To: elecraft@mailman.qth.net
>
driving this thread.
Lee K0WA
--- On Fri, 12/11/09, Guy Olinger K2AV wrote:
From: Guy Olinger K2AV
Subject: Re: [Elecraft] [K3] 150 watt "boots" for 160m
To: "elecraft"
Date: Friday, December 11, 2009, 1:11 PM
>From 100 to 150, for 1.7 dB, when Bell Laboratories rese
A good article on the value of a DB is an old timer in QST I think it was,
Station design for DX
I guarantee you that if you improve your station by 1Db or more you will
tell the difference, have done it and it works. A whole new layer of DX
opens up for every DB you can find.
I see comments all
Guy Olinger K2AV wrote:
>>From 100 to 150, for 1.7 dB, when Bell Laboratories research (with
> huge capital investment and telephone maintenance dollars on the line)
> determined that 3 dB was the signal strength change discernment for
> most people?
>
> It's amazing how these slim changes hold on
Communications Concepts can help. www.communication-concepts.com/
Frank - W4NHJ
Julius Fazekas n2wn wrote:
>
> Wondering if anyone has a suggestion of a solid state amp or "pushing" the
> K3 PA to obtain 150 watts out on 160m?
>
> A kit or HB would be fine...
>
> 73,
> Julius
> n2wn
>
--
>From 100 to 150, for 1.7 dB, when Bell Laboratories research (with
huge capital investment and telephone maintenance dollars on the line)
determined that 3 dB was the signal strength change discernment for
most people?
It's amazing how these slim changes hold on with hams and spend their
money, w
I am reminded of the recent sale item from Elecraft. The 2010 ARRL Handbook
is to have a 250 Watt HF amp design in it. One ought to be able to drop the
K3 output appropriately to drive it to 150 Watts.
73,
Dick - KA5KKT
__
Elecraft
Sense, ask for help from somebody who has some Common Sense. Is
Common Sense divine?
Common Sense is the image of the Creator expressing revealed truth in my mind.
- J. Wolf
--- On Fri, 12/11/09, Julius Fazekas n2wn wrote:
From: Julius Fazekas n2wn
Subject: [Elecraft] [K3] 150 watt &quo
>>
>> Wondering if anyone has a suggestion of a solid state amp or "pushing"
>> the K3 PA to obtain 150 watts out on 160m?
Why can't you just hook up 120 volts AC as your power source instead of that
puny little 12 volts DC thing. Not only would you get 10 times the voltage
which
according to
Dang!
Competition ;o)
Craig D. Smith wrote:
>
> I want one too
>
>... Craig AC0DS
>
> <> Wondering if anyone has a suggestion of a solid state amp or "pushing"
> the K3
> <> PA to obtain 150 watts out on 160m?
>
> _
I want one too
... Craig AC0DS
<> Wondering if anyone has a suggestion of a solid state amp or "pushing"
the K3
<> PA to obtain 150 watts out on 160m?
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman
Hi Brian
100 to 150...
Sometimes that's all you need to go from "n2?" to "n2wn" ;o)
It may not be realistic, but might be fun to play with if not too expensive.
All the 160 contests allow LP to 150 watts...
73,
Julius
Brian Machesney wrote:
>
> Julius,
>
> Do you want to amplify 10 watts t
Julius,
Do you want to amplify 10 watts to 150 watts, or 100 watts to 150 watts? The
former is nearly 12dB- about 2 S-units - while the latter is less than 2dB -
about 1/3 of an S-unit, a difference which would be very difficult to
discern on the air.
--
73 -- Brian -- K1LI
On Fri, Dec 11, 2009
Wondering if anyone has a suggestion of a solid state amp or "pushing" the K3
PA to obtain 150 watts out on 160m?
A kit or HB would be fine...
73,
Julius
n2wn
-
Julius Fazekas
N2WN
Tennessee Contest Group
http://www.k4ro.net/tcg/index.html
Tennessee QSO Party
http://www.tnqp.org/
Elecraf
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