Hi Brent: yes I agree. since getting the SDR, now about two mo ago, I see
things I never knew were there. probably repeating, but the better sounding
AM needs about 4 to 4.5 each side if the receiver can handle that, a lot do
not. that is just one reason why I stay out of the 3880 area unless
look at K4NYWs site.
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Bob:
I am pretty sure that by bandwidth of 3 kc they
definitely meant *modulating signal* bandwidth
of 3 kc.
- Jim W4ENE
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Jim,
I understand what the rules mean, however is seems that some folks feel
that the entire emission from AM DSB is 3Kc.
I just wanted to clearly tell it how it is.
What it comes down to, an AM DSB *WILL* exceed 6Kc. That would even be
if each sideband is limited to 3Kc in width. This is
We've been beating this DEAD horse.
Don Chester made some very good points regarding the way human process
audio presented to the ear.
Some may disagree. The reality is just what Don stated. The consonants
do indeed appear up around 3500cps.
If one were to have an audiogram, hearing test,
The alarming confusion expressed right here on the AMRADIO mailing list
regarding the occupied bandwidth of a DSB AM signal makes my point
beautifully. Most hams know what mode they are running, but few really
know the bandwidth of their signnal.
Very few hams have the knowledge, skills, or
That is precisely WHY I posted my earlier message today! Subject:
Signal Bandwidth.
To lay out what the ENTIRE AM signal is composed of, and by words,
describe what it will/would look like, whether you laid it out on a
graph with stubby pencil, or were to look at it with a station monitor
He he - yeah, and unless I missed something nobody has really defined
what the parameters are for that bandwidth anyway!
- 6dB?
-40dB?
And of course there are ALL KINDS of other details beyond
just this number.
Unless the discussion became a whole lot more technical than
it has been up to
If the -3db point of your AM modulator is say 3600HZ then your signal will
be +/- 3600Hz at the -3db point.This is 7200Hz.
Bob Macklin
K5MYJ
Seattle, Wa.
Real Radios Glow In The Dark
- Original Message -
From: sbjohns...@aol.com
To: amradio@mailman.qth.net
Sent: Wednesday, March 10,
No place in Part 97 is the bandwidth for eater SSB or AM defined.
Bob Macklin
K5MYJ
Seattle, Wa.
Real Radios Glow In The Dark
- Original Message -
From: Bry Carling bcarl...@cfl.rr.com
To: Discussion of AM Radio in the Amateur Service
amradio@mailman.qth.net
Sent: Wednesday, March 10,
Good.
Rob
K5UJ
On Wed, Mar 10, 2010 at 9:01 PM, Bob Macklin macklin...@msn.com wrote:
No place in Part 97 is the bandwidth for eater SSB or AM defined.
Bob Macklin
K5MYJ
Seattle, Wa.
Real Radios Glow In The Dark
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Our Main
No place in Part 97 is the bandwidth for eater SSB or AM defined.
Section 97.307(a) is the closest regulation we have pertaining occupied
bandwidth in the American amateur service. However, some folks have argued
that Sections 2.201 and 2.202 apply to the Part 97 service since Section
Since I got my ticket in 1957 DSB AM was defined as 6KC B/W.
Title 47, Part 2.202 does define the bandwidth for DSB AM as 6KHz.
Bob Macklin
K5MYJ
Seattle, Wa.
Real Radios Glow In The Dark
- Original Message -
From: Paul Christensen w...@arrl.net
To: Discussion of AM Radio in the Amateur
I have enough of a time keeping the BEASTs reined in at 1500W PEP. If I
set the microphone resting current at the specified in the TM at 40ma,
the darn thing WILL hit 2500W PEP.
Bob - N0DGN
Bob, what are you using to measure your PEP?
All the stock BC-610's I ever worked on back in the
Don,
The first issue, the BC-610sw were designed and spec'd to run at 100V AC.
Mine rune at the currently available 125 to 127 VAC that is supplied.
This places voltages ABOVE those listed in the TMs.
Therefore, when one looks at the voltage difference, this will carry
through as higher
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