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 eac
[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 l
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 conversatio
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?
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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
-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
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
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
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 chan
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 10
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
: [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
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
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 st
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
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
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