Re: [Elecraft] Amplifiers

2017-12-14 Thread Wes Stewart
Maybe I dozed off during that nearly three hour fireside chat but I came away 
disappointed.  I wanted some meat about things like IMD, an issue Elecraft has 
plenty of, device selection, biasing, power control, matching and so forth.


Wes  N7WS

On 12/14/2017 9:06 AM, Brian Heinitz wrote:

With all of the anticipation about the KPA 1500, a timely and informative 
discussion of that product and amplifiers in general can be heard on episode 38 
of the Workbench podcast at Ham Radio 360.

David Shoaf KG6IRW from Elecraft is interviewed by Workbench podcast hosts (and 
Elecraft product owners) George KJ6VU and Jeremy KF7IJZ. This edition of the 
podcast does a great job of explaining the design philosophy of the KPA 1500 
(and KPA 500) and discusses considerations any ham should think about when 
planning on adding an amplifier to their shack.

If you are not familiar, the Workbench podcast is one of three podcasts 
produced under the Ham Radio 360 umbrella. The Workbench is specifically 
focused on the hands-on DIY or “maker” side of our hobby and as such offers a 
deeper dive into some of the more technical aspects of the hobby. The other two 
podcasts focus on portable or field operations (great for KX3/KX2 users) and on 
the hobby in general. Elecraft is a sponsor of the podcast, and I highly 
recommend them to you.

Here’s the link to episode 38 on amplifiers with David Shoaf KG6IRW:

http://hamradio360.com/index.php/2017/12/05/ham-radio-workbench-37-hf-amplifiers-with-kg6irw/

Brian Heinitz
K1 / K2 and multiple mini modules
KI7LKB
__


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

[Elecraft] Amplifiers

2017-12-14 Thread Brian Heinitz
With all of the anticipation about the KPA 1500, a timely and informative 
discussion of that product and amplifiers in general can be heard on episode 38 
of the Workbench podcast at Ham Radio 360.

David Shoaf KG6IRW from Elecraft is interviewed by Workbench podcast hosts (and 
Elecraft product owners) George KJ6VU and Jeremy KF7IJZ. This edition of the 
podcast does a great job of explaining the design philosophy of the KPA 1500 
(and KPA 500) and discusses considerations any ham should think about when 
planning on adding an amplifier to their shack. 

If you are not familiar, the Workbench podcast is one of three podcasts 
produced under the Ham Radio 360 umbrella. The Workbench is specifically 
focused on the hands-on DIY or “maker” side of our hobby and as such offers a 
deeper dive into some of the more technical aspects of the hobby. The other two 
podcasts focus on portable or field operations (great for KX3/KX2 users) and on 
the hobby in general. Elecraft is a sponsor of the podcast, and I highly 
recommend them to you.

Here’s the link to episode 38 on amplifiers with David Shoaf KG6IRW:

http://hamradio360.com/index.php/2017/12/05/ham-radio-workbench-37-hf-amplifiers-with-kg6irw/

Brian Heinitz
K1 / K2 and multiple mini modules
KI7LKB 
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com

[Elecraft] Amplifiers

2017-08-30 Thread Charles W. Shaw
If someone were to buy my TITAN III for $2050 plus UPS 
shipping and insurance, I would be happy to order a KPA1500 for my 
Elecraft K3S/P3 station.  If interested contact me only at my 
email:  chass...@leaco.net


73, Charles Shaw - N5ULHobbs, NM 
__

Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com


Re: [Elecraft] Amplifiers in general

2016-12-31 Thread Jim Brown

On Sat,12/31/2016 6:29 PM, Bill Frantz wrote:
We concluded that the very low harmonic and IMD distortions of the 
sound system made it easier to decode the (undistorted) acoustic speech.


That system was highly respected by auidio pros at the time. The primary 
reason it was so clean was that each instrument was feeding its own 
vertical line array. Loudspeaker arrays like that produce a narrow beam 
in the vertical plane, but are wide in the horizontal plane. It's like 
stacking antennas. That narrow beam greatly reduces reverberation, which 
is what made the sound easy to understand. Another advantage of that 
system was that if you were reasonably close, you could localize each 
instrument aurally as well as visually. That also makes the sound 
cleaner. And yes, the distortion was probably lower, but the other two 
reasons I noted are probably the most important.


73, Jim K9YC

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com


Re: [Elecraft] Amplifiers in general

2016-12-31 Thread Bill Johnson
Bill, I also experienced a very quality system at a friend's house ~ 1976
and it was amazing.  A wall of speakers and beautiful volume, concert level
and able to talk.  Reminds me of my Dynaco A60 speakers and amp.  This was
the best audio at the time and I starved to save $'s to purchase this audio
equipment, while stationed in Germany, from the PX.  In the Signal Corp  we
were trained techs in audio for the passing of traffic to and fro from Korat
AFB to Viet Nam and other linked stations.  We learned a ton about audio and
equalization and worked diligently to stay within parameters in our
multiplexed signals with the best audio equipment for the military and
probably anywhere. ( My experience is frozen in memory so I understand what
you are writing about. )  A truly fantastic experience.  Yes, I can still
hear with damage done from shooting ranges, concussion grenades and 105 dB
alarms at the site when parameters failed.  Other than that, life now is
good.

73,
Bill
K9YEQ

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bill
Frantz
Sent: Saturday, December 31, 2016 8:30 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Amplifiers in general

A group of about 5 of my friends and I noticed this effect at a early 1970s
Grateful Dead concert at the San Francisco Cow Palace. They were testing a
new sound system which came to be called "The Wall of Sound". While the
music was definitely loud, very loud, we could have a normal conversation
with each other, something we had never been able to do at other concerts.
We concluded that the very low harmonic and IMD distortions of the sound
system made it easier to decode the (undistorted) acoustic speech.

This experience makes me very interested in the level of audio distortion in
amateur radio audio chains. The 10% quoted for HTs is much too much for
optimum copy. Copy is better if the audio chains are hifi quality for
distortion.

73 Bill AE6JV

On 12/31/16 at 11:51 AM, caut...@montac.com (Clay Autery) wrote:

>I submit that all "noise" is not equal.  I'm guessing that you can hear 
>a radio transmission mathematically below the apparent  noise level 
>because it is "atypical" or "organized noise" as opposed to the "noise"
>in the S2 noise floor which is "disorganized".
-
Bill Frantz| Re: Hardware Management Modes: | Periwinkle
(408)356-8506  | If there's a mode, there's a   | 16345 
Englewood Ave
www.pwpconsult.com | failure mode. - Jerry Leichter | Los Gatos, CA 95032

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message
delivered to k9...@live.com
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com


Re: [Elecraft] Amplifiers in general

2016-12-31 Thread Bill Frantz
A group of about 5 of my friends and I noticed this effect at a 
early 1970s Grateful Dead concert at the San Francisco Cow 
Palace. They were testing a new sound system which came to be 
called "The Wall of Sound". While the music was definitely loud, 
very loud, we could have a normal conversation with each other, 
something we had never been able to do at other concerts. We 
concluded that the very low harmonic and IMD distortions of the 
sound system made it easier to decode the (undistorted) acoustic speech.


This experience makes me very interested in the level of audio 
distortion in amateur radio audio chains. The 10% quoted for HTs 
is much too much for optimum copy. Copy is better if the audio 
chains are hifi quality for distortion.


73 Bill AE6JV

On 12/31/16 at 11:51 AM, caut...@montac.com (Clay Autery) wrote:


I submit that all "noise" is not equal.  I'm guessing that you can hear
a radio transmission mathematically below the apparent  noise level
because it is "atypical" or "organized noise" as opposed to the "noise"
in the S2 noise floor which is "disorganized".

-
Bill Frantz| Re: Hardware Management Modes: | Periwinkle
(408)356-8506  | If there's a mode, there's a   | 16345 
Englewood Ave
www.pwpconsult.com | failure mode. - Jerry Leichter | Los Gatos, 
CA 95032


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com


Re: [Elecraft] Amplifiers in general

2016-12-31 Thread Wes Stewart

That's what I was thinking.

On 12/31/2016 11:43 AM, Charlie T, K3ICH wrote:

Using your same logic, why run more than a couple watts output?



__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com


Re: [Elecraft] Amplifiers in general

2016-12-31 Thread Fred Jensen
I believe you're correct Clay.  I think our ears/brain can integrate the 
overall signal, and the noise, if more or less random, will recede into 
the background.  The desired CW signal will then stand out.  I suspect 
that, were you to key noise similar to the background noise and that 
filled the receive BW, it would disappear for a listener as soon as it's 
mean amplitude fell to the background level.


This may also explain why, the more you talk, the less your teenager hears.

73,

Fred K6DGW
- Sparks NV DM09dn

- Northern California Contest Club
- CU in the Cal QSO Party 7-8 Oct 2017
- www.cqp.org

On 12/31/2016 11:51 AM, Clay Autery wrote:

Let me posit a SWAG on why this case APPEARS to buck the math in reality

I submit that all "noise" is not equal.  I'm guessing that you can hear
a radio transmission mathematically below the apparent  noise level
because it is "atypical" or "organized noise" as opposed to the "noise"
in the S2 noise floor which is "disorganized".

Obviously, there are much more correct and scientific ways of
illustrating this, but it would be a LOT longer winded.  :)

73,

PS - Just my intuitive SWAG, btw.


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com


Re: [Elecraft] Amplifiers in general

2016-12-31 Thread Doug Turnbull
Fred,
I agree with all you say but still when reading a signal in the noise on
160M believe me a dB can help in recognizing a call sign.   I often think
that operating on TB is some what like operating on VHF/UHF.  It is
certainly a struggle with noise.

 73 Doug EI2CN

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Fred
Jensen
Sent: 31 December 2016 19:36
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Amplifiers in general

Please let me correct my typo:  100 mW is 30 dB down, not 40.  Correct 
hand, wrong finger.  100 mW should be close to S0, 2 S-units into the noise.

73,

Fred K6DGW
Sparks NV USA
Washoe County DM09dn

On 12/31/2016 11:25 AM, Fred Jensen wrote:
> One can do this with the NCDXF Beacons ... they change in four 10 dB
> steps, 100 W, 10 W, 1 W, and 100 mW.  No sunspots right now, but you
> might be able to hear one or two of them on 14100.  Most interesting
> thing I notice is, while the 100 W signal may be S6 in S2 noise, I can
> still hear the 100 mW signal which should be 40 dB down [~S0].  The math
> is sound and exact, the reality ... not so much.

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to turnb...@net1.ie

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com


Re: [Elecraft] Amplifiers in general

2016-12-31 Thread Clay Autery
Let me posit a SWAG on why this case APPEARS to buck the math in reality

I submit that all "noise" is not equal.  I'm guessing that you can hear
a radio transmission mathematically below the apparent  noise level
because it is "atypical" or "organized noise" as opposed to the "noise"
in the S2 noise floor which is "disorganized".

Obviously, there are much more correct and scientific ways of
illustrating this, but it would be a LOT longer winded.  :)

73,

PS - Just my intuitive SWAG, btw.

__
Clay Autery, KY5G
MONTAC Enterprises
(318) 518-1389

On 12/31/2016 1:36 PM, Fred Jensen wrote:
> Please let me correct my typo:  100 mW is 30 dB down, not 40.  Correct
> hand, wrong finger.  100 mW should be close to S0, 2 S-units into the
> noise.
>
> 73,
>
> Fred K6DGW
> Sparks NV USA
> Washoe County DM09dn
>
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com


Re: [Elecraft] Amplifiers in general

2016-12-31 Thread Bill Johnson
David, Super point.  

73,
Bill
K9YEQ

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
dm...@nexicom.net
Sent: Saturday, December 31, 2016 12:58 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Amplifiers in general


An increase in power of another station is not always well perceived but the
difference is there.  I've heard guys turn amps on and off and 
you really hear no differencethis is   because your AGC is 
compensating.the difference may actually be big  your just not 
hearing it.
Sometime in a QSO  have the other station increase or decrease the 
signal by 3db.   it will not be that noticable.   now turn off AGC and 
 ask the other station do it again  it will be much more evident. than with
AGC on.


With more than one signal present say in a pileup the different will be
noticeable because the weaker signals will seem quiter when a strong signal
comes in. its all relative.


David Moes
VE3SD



__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message
delivered to k9...@live.com
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com


Re: [Elecraft] Amplifiers in general

2016-12-31 Thread Fred Jensen
Please let me correct my typo:  100 mW is 30 dB down, not 40.  Correct 
hand, wrong finger.  100 mW should be close to S0, 2 S-units into the noise.


73,

Fred K6DGW
Sparks NV USA
Washoe County DM09dn

On 12/31/2016 11:25 AM, Fred Jensen wrote:

One can do this with the NCDXF Beacons ... they change in four 10 dB
steps, 100 W, 10 W, 1 W, and 100 mW.  No sunspots right now, but you
might be able to hear one or two of them on 14100.  Most interesting
thing I notice is, while the 100 W signal may be S6 in S2 noise, I can
still hear the 100 mW signal which should be 40 dB down [~S0].  The math
is sound and exact, the reality ... not so much.


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com


Re: [Elecraft] Amplifiers in general

2016-12-31 Thread Fred Jensen
One can do this with the NCDXF Beacons ... they change in four 10 dB 
steps, 100 W, 10 W, 1 W, and 100 mW.  No sunspots right now, but you 
might be able to hear one or two of them on 14100.  Most interesting 
thing I notice is, while the 100 W signal may be S6 in S2 noise, I can 
still hear the 100 mW signal which should be 40 dB down [~S0].  The math 
is sound and exact, the reality ... not so much.


73,

Fred K6DGW
- Sparks NV DM09dn

- Northern California Contest Club
- CU in the Cal QSO Party 7-8 Oct 2017
- www.cqp.org

On 12/31/2016 10:58 AM, dm...@nexicom.net wrote:


Sometime in a QSO  have the other station increase or decrease the
signal by 3db.   it will not be that noticable.   now turn off AGC and
ask the other station do it again  it will be much more evident. than
with AGC on.



With more than one signal present say in a pileup the different will be
noticeable because the weaker signals will seem quiter when a strong
signal comes in. its all relative.



David Moes
VE3SD


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com


Re: [Elecraft] Amplifiers in general

2016-12-31 Thread dmoes


An increase in power of another station is not always well perceived 
but the difference is there.  I've heard guys turn amps on and off and 
you really hear no differencethis is   because your AGC is 
compensating.the difference may actually be big  your just not 
hearing it.
Sometime in a QSO  have the other station increase or decrease the 
signal by 3db.   it will not be that noticable.   now turn off AGC and 
ask the other station do it again  it will be much more evident. than 
with AGC on.



With more than one signal present say in a pileup the different will 
be noticeable because the weaker signals will seem quiter when a 
strong signal comes in. its all relative.



David Moes
VE3SD



__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com


Re: [Elecraft] Amplifiers in general

2016-12-31 Thread Doug Turnbull
Dear OMs,
There are times when I am sure that 1 dB would make a difference on
160M.

   73 Doug EI2CN

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
Charlie T, K3ICH
Sent: 31 December 2016 18:44
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] Amplifiers in general

Using your same logic, why run more than a couple watts output? 

 It can easily be heard around the world if conditions are right.

Anything more is a waste of power AND money.

73, Charlie k3ICH



-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bill
Sent: Saturday, December 31, 2016 10:01 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Amplifiers in general

I have always been under the impression the doubling of output power will
result in a power gain of 3 db. And, that 3 db gain is the least signal
increase noticeable at the receiving point. KPA500 outputs 500 Watts - 1000
Watts would give an output gain of 3 db (over the KPA500) and 1500 Watts a
little over 4 db gain. That being my understanding - why would I want to
spend a box full of dollars for more power than my
KPA500 provides? Or, is my understanding flawed?

FWIW, I have run all kinds of amps in my nearly 60 years of being the on the
air and have found that Watts are Watts, regardless of how you generate them
(fancy, cheap, junk, or solid gold).

Everyone have a super HAPPY NEW YEAR!!!

Bill W2BLC K-Line (medium power HF)

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message
delivered to pin...@erols.com

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to turnb...@net1.ie

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com


Re: [Elecraft] Amplifiers in general

2016-12-31 Thread Charlie T, K3ICH
Using your same logic, why run more than a couple watts output? 

 It can easily be heard around the world if conditions are right.

Anything more is a waste of power AND money.

73, Charlie k3ICH



-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bill
Sent: Saturday, December 31, 2016 10:01 AM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Amplifiers in general

I have always been under the impression the doubling of output power will
result in a power gain of 3 db. And, that 3 db gain is the least signal
increase noticeable at the receiving point. KPA500 outputs 500 Watts - 1000
Watts would give an output gain of 3 db (over the KPA500) and 1500 Watts a
little over 4 db gain. That being my understanding - why would I want to
spend a box full of dollars for more power than my
KPA500 provides? Or, is my understanding flawed?

FWIW, I have run all kinds of amps in my nearly 60 years of being the on the
air and have found that Watts are Watts, regardless of how you generate them
(fancy, cheap, junk, or solid gold).

Everyone have a super HAPPY NEW YEAR!!!

Bill W2BLC K-Line (medium power HF)

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message
delivered to pin...@erols.com

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com


Re: [Elecraft] Amplifiers in general

2016-12-31 Thread K9MA
I'd just like to add that, averaged over a period of time, say a whole 
contest, a small difference in power can have a significant effect.  
While a dB or so might be very hard to detect in one QSO, over a few 
hundred it makes a difference.  On average, you get through a bit more 
often,  more stations come back to your CQ's, and it adds up.


73,

Scott K9MA


--
Scott  K9MA

k...@sdellington.us

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com


Re: [Elecraft] Amplifiers in general

2016-12-31 Thread Jim Brown

On Sat,12/31/2016 7:01 AM, Bill wrote:
I have always been under the impression the doubling of output power 
will result in a power gain of 3 db. 


Right.

And, that 3 db gain is the least signal increase noticeable at the 
receiving point.


Wrong.  As an audio professional, I had to learn a lot about human 
perception of sound. Here are some things I've learned, both by studying 
what others have learned and by my own observations.


1) If some sound is all by itself (that's all that you here, no other 
sounds), 1 dB is the smallest change in level that most listeners will 
hear.


2) If some sound is surrounded by other sounds -- a single instrument in 
a band or orchestra, a signal in noise, a 1 dB change can be the 
difference between hearing it and not hearing it. When I mixed live 
sound for 20-40 piece orchestras (Tony Bennett, for example), correcting 
a balance problem usually involved slightly moving the fader for the 
instrument that was too loud or not loud enough. When adjusting voice 
paging levels in an office building, 2-3dB was the difference between 
not quite loud enough to get over the air conditioner noise and being to 
loud. A change in the frequency response of a dB or two can be the 
difference between sounding "right" or not.


3) If a sound is all by itself, it takes a change in level of 6-10 dB to 
be perceived as "twice" (or "half" as loud. But that doesn't apply to a 
transmitter, because we have a volume control on our radio. :)


4) Human voice levels vary widely as we talk. Variations of 20 dB are 
common.


5) Voice frequencies in the range of 500 - 3,000 Hz are most critical 
for speech intelligibility.


In addition to running more power, we can get gain from improving  our 
antenna system. A more efficient counterpoise/radial system for a 
vertical, feedline with lower loss, a more efficient antenna tuner, and 
the biggie, an antenna that better focuses its radiation at the 
elevation, and/or in the direction, that gets to the other station. We 
can use audio compression, and we can equalize our audio to transmit 
only the parts of our voice that provides the greatest speech 
intelligibility. Compression and EQ, if done well, can yield an 
effective 13 dB of gain! All of those dB add up with the power that 
we're running. Nearly all TV and radio broadcasting makes extensive use 
of dynamics processing to make their signal as loud as possible, and the 
most skilled use careful equalization on the microphones of talkers that 
matter.


73, Jim K9YC


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com


[Elecraft] Amplifiers in general

2016-12-31 Thread Bill
I have always been under the impression the doubling of output power 
will result in a power gain of 3 db. And, that 3 db gain is the least 
signal increase noticeable at the receiving point. KPA500 outputs 500 
Watts - 1000 Watts would give an output gain of 3 db (over the KPA500) 
and 1500 Watts a little over 4 db gain. That being my understanding - 
why would I want to spend a box full of dollars for more power than my 
KPA500 provides? Or, is my understanding flawed?


FWIW, I have run all kinds of amps in my nearly 60 years of being the on 
the air and have found that Watts are Watts, regardless of how you 
generate them (fancy, cheap, junk, or solid gold).


Everyone have a super HAPPY NEW YEAR!!!

Bill W2BLC K-Line (medium power HF)

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com


[Elecraft] Elecraft Amplifiers and KPA 1500!!!!

2016-02-20 Thread Doug Turnbull
Dear OMs and YLs,
 As we are allowed to run 1500W for contesting in EI, I am fortunate in
old age to own an SPE Expert 2kFA, Acom 1000 and Acom 2000A.   They all have
advantages and drawbacks.   Acom and SPE both build to a high standard and
in my experience are most reliable.   The Acom 1000 is perhaps the very best
buy in a non-automatic self tune vacuum tube amp.   The Acom 2000A is a
beautiful auto-tune and runs quietly but waiting for it to warm up takes a
long time!   

 The SPE Expert 2KFA is solid state and instant on.   It is a great
except for two things:
1)This is a very noisy amplifier and I wonder if this is not a problem with
most solid state amps.   Cooling is critical to keep junction temperatures
down.   The noise problem remains even if running on the 600 Watt power
level at the 400 Watts allowed in EI for non contest QSOs.   I can not
operate with the SPE unless wearing headphones preferably ones with good
noise rejection.

2) If one runs the SPE 2kFA without the built in automatic ATU then even
with an SWR of around 1.5/1.6 you will create terrible distortion on either
SSB or CW.   This distortion will quickly make you unpopular on the bands.
One must be careful of this.   Dropping the power level does not seem to
solve this problem.   Of course it has a good internal automatic tuner which
works wonderfully so if you use the tuner there is no problem.   A multiband
antenna which did not require a tuner normally but did on one band could
prove slightly problematic.   You would need to change it over to another of
the six antenna output connectors and use the built in auto-tuner.

 I must say something else in favour of the SPE it does not excessively
heat the room while having the Acom 2000A in use is like having Wayne's
daughter's electric heater on.  The SPE is definitely more efficient when it
comes to power consumption.

I am an almost fanatical Elecraft user but do not own a KPA500 as I saw
no point.   A KPA 1500 would certainly interest me but I wonder if it would
not be priced at too high a level for my pocket.   Alphas do not appear to
be overpriced but these days have a poor reputation in Europe.  This
surprises me but is the case.   I have at times seriously considered Alpha
and backed off because of the advice of friends whose opinion I value.

Ameritron amps also get bad press but seem to do the job for relatively
little money.   I have a friend with an old Ameritron who is still very fond
of it and would not part even though he now also owns an Acom 1010.   So the
lower cost alternative continues to fill a need.

My friends with KPA 500 amplifiers are all fond of them and have nothing
negative to say though I am told on air by some others that the KPA 500 is
not so quiet.   However the EI Elecraft guru EI6IZ says that the KPA 500 is
quiet.   Not having used one I can not say.   No one seems to be selling
their KPA 500.   Some of us really want it to be as quiet as a library.

Before you purchase an amplifier try using one of visit a ham with one.
Consider noise, turn on time, distortion, reliability, band coverage, power
efficiency and your pocket book.   If you are an old goat like me with a
fragile back think of weight as well.   The KPA 1300 looks good for
DXpeditions as of course does the KPA 500 which has been so popular of late.

Elecraft is first class in all respects.   Design, service and support
are just unbeatable.We are fortunate that they exist and have brought
higher standards to our hobby.   I suppose a KPA 1500 would have me
drooling.

73 Doug EI2CN  

 

-Original Message-
From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
j...@kk9a.com
Sent: 20 February 2016 18:02
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] KPA1500

It would likely cost over $10,000 like the Ohio based Dishtronix Prometheus
and I do hear of many stations using them. Solid State amps typically do not
handle high SWR well so if produced a KAT-1500 would be nice accessory. I am
happy with my KPA-500/KAT-500 and the rest is an unlikely dream.

John KK9A

>From Greg n4cc at windstream.net
Sat Feb 20 12:24:29 EST 2016
Previous message (by thread): [Elecraft] KPA1500

Everything you say about Elecraft is speculation, Ken.  You don't know what
it would cost them to produce the amp.  My speculation is that they could do
a better job than SPE -- if they chose to do it.  How many would they sell?
Who knows?  The ham population is growing older fast and a lot of us old
codgers can "afford" a new amp of that caliber.  I have nothing against
Ameritron amps...happen to own one myself...in addition to three Alphas and
the KPA500 -- so no I don't "need" a KPA1500.  But I would buy one just
because I know the integration with the K3 and quality that would go into it
would be fantastic -- not to mention that it would be from an American
manufacturer with the best service in the industry.  Furthermore, Elecraft
is compe

Re: [Elecraft] Amplifiers

2012-02-06 Thread Kjeld Holm
Dear OM John,

 

My recommandation is Acom 2000A (plus Acom 2000SW and Acom 2000S).

 

This is not cheap right now but in the long run it will be the least
expensive solution because you will not want anything else for the next 10
to 20 years.

 

I have "lost" money on going through the following PAs before arriving at
the "final solution": Yaesu FL-2700, Hammerlund (forgot the type), Drake
L4B, SPE Expert 1K.

 

Vy de 73

OZ1CCM Kel

 

KH-Translation ApS

Gyvelbakken 11

DK-4400 Kalundborg

Tel.: (+45) 30 49 39 64

Fax:  (+45) 45 82 96 37

e-mail:  <mailto:k...@kh-translation.dk> k...@kh-translation.dk

CVR (VAT) 29613443

Homepage: www.kh-translation.dk <http://www.kh-translation.dk/> 

 

 

-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of John Simmons
Sent: 3. februar 2012 20:56
To: Elecraft
Subject: [Elecraft] Amplifiers

 

I'm looking for recommendations on a full power (1.5KW output) amp
(something more than a pair of 3-500s) that covers 160-10 including the WARC
bands. Currently I'm running a Henry 2K-2 which works great. Alpha? 

What model. I'm considering something used rather than new. Please hold the
opinions on 1KW vs 1.5KW.

 

John NI0K

__

Elecraft mailing list

Home:  <http://mailman.qth.net/mailman/listinfo/elecraft>
http://mailman.qth.net/mailman/listinfo/elecraft

Help:  <http://mailman.qth.net/mmfaq.htm> http://mailman.qth.net/mmfaq.htm

Post:  <mailto:Elecraft@mailman.qth.net> mailto:Elecraft@mailman.qth.net

 

This list hosted by:  <http://www.qsl.net> http://www.qsl.net

Please help support this email list:  <http://www.qsl.net/donate.html>
http://www.qsl.net/donate.html

__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html


Re: [Elecraft] Amplifiers

2012-02-03 Thread Jim Brown
On 2/3/2012 11:55 AM, John Simmons wrote:
> I'm looking for recommendations on a full power (1.5KW output)

The Ten Tec Titan 425 (the original) works quite well with a K3 (and 
with every other rig I've used to drive it. I have three of them.  It is 
possible to key the K3 directly and use the K3 Key out to drive the 
Titan in VOX mode on both CW, SSB, and digital modes.  That's because 
the K3 has a built-in delay of the TX signal that is adjustable, and 
defaults to 8msec.  It runs fine in full QSK, but I don't run it that 
way very often because I do a lot of contesting, and got tired of 
replacing the vacuum relay every couple of years. :)

73, Jim K9YC
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html


Re: [Elecraft] Amplifiers

2012-02-03 Thread Arie Kleingeld PA3A
Used one: Go for a Commander HF-2500. built like a tank. No fancy stuff.

73
Arie PA3A

Op 3-2-2012 20:55, John Simmons schreef:
> I'm looking for recommendations on a full power (1.5KW output) amp
> <>I'm considering something used rather than new. Please hold
> the opinions on 1KW vs 1.5KW.
>
> John NI0K
>
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html


[Elecraft] Amplifiers

2012-02-03 Thread John Simmons
I'm looking for recommendations on a full power (1.5KW output) amp 
(something more than a pair of 3-500s) that covers 160-10 including the 
WARC bands. Currently I'm running a Henry 2K-2 which works great. Alpha? 
What model. I'm considering something used rather than new. Please hold 
the opinions on 1KW vs 1.5KW.

John NI0K
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html


[Elecraft] Amplifiers, Kits, etc. - 2 cents

2010-02-09 Thread Edward Dickinson, III
I don't have much of an idea of what Elecraft's thinking is on high power
other than the available history.  From postings here it would seem there is
some variance in what users might want or accept in an amplifier.  

It is hard for me to discern what proportion of the community those who post
may represent.  Nor can I guess the desires of those who choose not to post.
Surely there are many who want and can afford 'it all.'  And no doubt many
who would be quite pleased with less.  Maybe Elecraft knows its base well
enough that the following need not be considered.

Perhaps Elecraft could survey their customer base by emailing them with a
link to a web-based check-off (secure?) form.

To get my serious attention an amplifier must have...
  Watts Output 
  Internal Tuner
  Auto-Band switching
  Feature...
  Feature...
  Capability...
  Capability...
  Specification...
  Specification...

I would consider the following if offered as modular/other
options...
  Internal Tuner
  Desktop External Tuner
  Remote Automatic Tuner
  Antenna Outputs
  Computer Interface
  etc...

So on and so forth...
  ...
  ...

The following are not important to me in an amplifier
  ...
  ...

?Pricing Information?
  Mid-power base model @ $
  Full-power base model @ $
  Everything @ $
  A kit should save me $___ over an assembled unit

A similar form might apply to other development projects or general planning
for Elecraft.

Just as well, Elecraft may know the market and their own capability.  It
could also be that development of an amp or amps could be at a point beyond
the need for such information.

Myself, I could be interested in a basic mid-power SS amp and definitely
with auto-band switching (option?).  Small package(s), matching
enclosures(s) are appealing.  Add-ons could be a consideration...W2-like
option added into basic amp, added automatic tuner...for examples.


73,
Dick - KA5KKT

PS  I hope this posting doesn't look like a mess as you receive it.


__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html


Re: [Elecraft] Amplifiers

2008-12-22 Thread Stan Rife
C'mon 

--- On Mon, 12/22/08, Ralph Parker  wrote:

From: Ralph Parker 
Subject: [Elecraft] Amplifiers
To: Elecraft@mailman.qth.net
Date: Monday, December 22, 2008, 2:43 PM

>I just can't get my head around Ameritron (Mighty Fine Junk) by any
other
>name as builders of "quality" equipment.

OTOH, I think my Al-1200 is very well built. Ameritron isn't really MFJ.
A few years ago, I requested that my name be put on the KPA800 waiting list.
I hope it's still there. It's gonna be a great DXpedition partner for
my K3.

VE7XF

___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
 http://mailman.qth.net/mailman/listinfo/elecraft

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
 http://mailman.qth.net/mailman/listinfo/elecraft

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com

Re: [Elecraft] Amplifiers

2008-12-22 Thread Jim Miller
Ameritron is Ameritron.  They were bought by MFJ of course but I am not
aware of any of the amplifiers that were not designed and being built by
Ameritron before of their sale to MFJ.

73, Jim KG0KP

- Original Message - 
From: "Ralph Parker" 
To: 
Sent: Monday, December 22, 2008 2:43 PM
Subject: [Elecraft] Amplifiers


> >I just can't get my head around Ameritron (Mighty Fine Junk) by any other
> >name as builders of "quality" equipment.
>
> OTOH, I think my Al-1200 is very well built. Ameritron isn't really MFJ.
> A few years ago, I requested that my name be put on the KPA800 waiting
list.
> I hope it's still there. It's gonna be a great DXpedition partner for my
K3.
>
> VE7XF
>
> ___
> Elecraft mailing list
> Post to: Elecraft@mailman.qth.net
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
>  http://mailman.qth.net/mailman/listinfo/elecraft
>
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>

___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
 http://mailman.qth.net/mailman/listinfo/elecraft

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com


[Elecraft] Amplifiers

2008-12-22 Thread Ralph Parker
>I just can't get my head around Ameritron (Mighty Fine Junk) by any other
>name as builders of "quality" equipment.

OTOH, I think my Al-1200 is very well built. Ameritron isn't really MFJ.
A few years ago, I requested that my name be put on the KPA800 waiting list.
I hope it's still there. It's gonna be a great DXpedition partner for my K3.

VE7XF

___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
 http://mailman.qth.net/mailman/listinfo/elecraft

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com


Re: [Elecraft] RE: Elecraft Amplifiers

2007-05-27 Thread G3SJJ
No, I wasn't meaning that, Jim. I agree with your comments and I think 
K3 then amps is a good marketing decision.As you say K3 volume should be 
in excess of amps but also K3 owners will be more amenable to go for the 
amps than K2 owners I suspect.


What I don't agree with are recent postings on the Reflector where users 
are saying that Elecraft shouldn't market amps because it is a QRP kit 
supplier.


I used follow business programs in the UK where initially Sir John 
Harvey-Jones and then Sir Gerry Robinson went in to companies to look 
and advice them on how to turn the business around if they were in 
trouble or how to expand. I am sure both would have held Elecraft in 
high esteem but would have disagreed with the idea of staying a QRP kit 
supplier.


73 Chris G3SJJ



[EMAIL PROTECTED] wrote:
In a message dated 5/27/07 6:21:00 AM Eastern Daylight Time, 
[EMAIL PROTECTED] writes:




I don't understand the argument
about Elecraft not marketing amps. T



It's simply a matter of available resources, IMHO. It's clear to me 
that Elecraft made the decision to delay the release of the amplifiers 
until after the release of the K3, because they don't have the 
resources to do both and provide adequate support for the entire 
Elecraft product line all at once.


IOW, rather than release everything at once and reduce their standards 
of customer service, they put K3 ahead of KPAxxx. Since they will 
probably sell more K3s than KPAs, this makes perfect sense.


More than one company supplying the amateur market has gone belly-up 
because they had great products but lacked a good marketing plan. 
Elecraft isn't repeating that history.


Just my impression from a continent away.

73 de Jim, N2EY


**
See what's free at http://www.aol.com.

___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft


Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com


Re: [Elecraft] RE: Elecraft Amplifiers

2007-05-27 Thread N2EY
In a message dated 5/27/07 6:21:00 AM Eastern Daylight Time, 
[EMAIL PROTECTED] writes:


> I don't understand the argument 
> about Elecraft not marketing amps. T

It's simply a matter of available resources, IMHO. It's clear to me that 
Elecraft made the decision to delay the release of the amplifiers until after 
the 
release of the K3, because they don't have the resources to do both and 
provide adequate support for the entire Elecraft product line all at once. 

IOW, rather than release everything at once and reduce their standards of 
customer service, they put K3 ahead of KPAxxx. Since they will probably sell 
more 
K3s than KPAs, this makes perfect sense.

More than one company supplying the amateur market has gone belly-up because 
they had great products but lacked a good marketing plan. Elecraft isn't 
repeating that history.

Just my impression from a continent away.

73 de Jim, N2EY


**
 See what's free at 
http://www.aol.com.
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
 http://mailman.qth.net/mailman/listinfo/elecraft

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com


Re: [Elecraft] RE: Elecraft Amplifiers

2007-05-27 Thread G3SJJ
Bill and Doug, you NEED the KPA800 then!!   
http://www.n6ie.com/Elecraft.html


I am not sure if it covers 6m but looking at the toroids I suspect so. 
Not a "full" kit presumably because of the SMD components and the 
associated situation as with the K3.  I don't understand the argument 
about Elecraft not marketing amps. The Company has the expertise and the 
customer base with hundreds if not thousands of 100w amps being used. 
These are very similar to the modules that would be in the KPA 800/1600 
units. There was big interest at Dayton last year and I see these as 
fulfilling several growing markets sectors. Firstly the users like 
yourselves, secondly the guys who want a US legal limit amp and finally 
like myself and others who want 2 amps for an SO2R or multi-op station.


Chris G3SJJ


Bill W5WVO wrote:

[EMAIL PROTECTED] wrote:

IMHO I would like to see a "full kit" amp on the order of the
Ameritron ALS-600. A nice "medium power " amp with full QSK and a
built in power supply. I think this could have a rather large market.


Agreed! About 600-750W out, built-in PS, with 6M COVERAGE (low end of 
band only, 50.0-50.5) at full power output to go with the K3's 6M 
capabilities. I think you'd have a sure-fire winner. I would buy one 
if I had to mortgage my mother's house.  ;-)


Bill / W5WVO



___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft   
Help: http://mailman.qth.net/subscribers.htm

Elecraft web page: http://www.elecraft.com


___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft


Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com


Re: [Elecraft] RE: Elecraft Amplifiers

2007-05-26 Thread Bill W5WVO

[EMAIL PROTECTED] wrote:

IMHO I would like to see a "full kit" amp on the order of the
Ameritron ALS-600. A nice "medium power " amp with full QSK and a
built in power supply. I think this could have a rather large market.


Agreed! About 600-750W out, built-in PS, with 6M COVERAGE (low end of band 
only, 50.0-50.5) at full power output to go with the K3's 6M capabilities. I 
think you'd have a sure-fire winner. I would buy one if I had to mortgage my 
mother's house.  ;-)


Bill / W5WVO



___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft


Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com


Re: [Elecraft] RE: Elecraft Amplifiers

2007-05-26 Thread w6jd
I have a problem with the Elecraft amps, i.e. hi-power amps have become 
commodity items.
I don't see that there can be any meaningful competition on the basis of price 
so you have to compete
with whiz-bang features. I've seen the amps, and they certainly look nice, but 
I don't see many, if any, features that aren't available elsewhere. Built-in 
tuner, PIN diode QSK, automatic band switching etc.
but nothing really "whiz-bang". I just hope that Elecraft won't get themselves 
in trouble with a product that will soak up a lot of resources and provide 
little return.

IMHO I would like to see a "full kit" amp on the order of the Ameritron 
ALS-600. A nice "medium power " amp with full QSK and a built in power supply. 
I think this could have a rather large market.
Basically a scaled down version of the 850 Elecraft amp.

Doug, W6JD
K2/100 #1626
K3/100 eagerly awaited


-- Original message -- 
From: W2AGN <[EMAIL PROTECTED]> 

> I always had mixed (mainly negative) feelings about the idea of a big 
> Elecraft 
> Amp. Elecraft started, and got it's loyal user base among QRPers. OK, so they 
> have a couple 100 watt rigs now, still not as far off as a 1500 watt amp. 
> 
> Sorta like if Hummer came out with a Hybrid. 
> 
> -- 
> --- 
> _ _ _ _ _ 
> / \ / \ / \ / \ / \ John L. Sielke 
> ( W )( 2 )( A )( G )( N ) http://w2agn.net 
> \_/ \_/ \_/ \_/ \_/ http://www.blurty.com/users/w2agn 
> check out: http://groups.yahoo.com/group/QRPariahs/ 
> ___ 
> Elecraft mailing list 
> Post to: Elecraft@mailman.qth.net 
> You must be a subscriber to post to the list. 
> Subscriber Info (Addr. Change, sub, unsub etc.): 
> http://mailman.qth.net/mailman/listinfo/elecraft 
> 
> Help: http://mailman.qth.net/subscribers.htm 
> Elecraft web page: http://www.elecraft.com 
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
 http://mailman.qth.net/mailman/listinfo/elecraft

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com


[Elecraft] RE: Elecraft Amplifiers

2007-05-26 Thread W2AGN
I always had mixed (mainly negative) feelings about the idea of a big Elecraft 
Amp. Elecraft started, and got it's loyal user base among QRPers. OK, so they 
have a couple 100 watt rigs now, still not as far off as a 1500 watt amp.


Sorta like if Hummer came out with a Hybrid.

--
---
  _____
 / \  / \  / \  / \  / \   John L. Sielke
( W )( 2 )( A )( G )( N )  http://w2agn.net
 \_/  \_/  \_/  \_/  \_/   http://www.blurty.com/users/w2agn
check out: http://groups.yahoo.com/group/QRPariahs/
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft


Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com


[Elecraft] Elecraft Amplifiers

2006-04-26 Thread sheajohnw
Is there any determination of duty cycle rating made yet for RTTY contesting 
use?  Will the amps produce full power on RTTY without overheating?  If not, 
how many watts output is considered appropriate for extensive run mode 
operation?  Has amp output power been determined when operating a K2/100 at 1/3 
of its maximum power to allow for extensive RTTY usage without overheating the 
K2/100?
 
73 de KB1IKD
___
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
 http://mailman.qth.net/mailman/listinfo/elecraft

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com