Interesting (or stupid) occurrence regarding the "AM Window" the other day..

[Opcom]

Don't argue with a goat

why, because they always "butt" in?

[Opcom]

"Sec. 97.305  Authorized emission types.

    (b) A station may transmit a test emission on any frequency
authorized to the control operator for brief periods for experimental
purposes, except that no pulse modulation emission may be transmitted on
any frequency where pulse is not specifically authorized and no SS
modulation emission may be transmitted on any frequency where SS is not
specifically authorized."

No pulse might be a problem with those amplifier-pulsing tune-up boxes that seem do just that.. Or is that confused with a series of dits?

SS - spread spectrum?


"sec. 97.307
    (2) No non-phone emission shall exceed the bandwidth of a
communications quality phone emission of the same modulation type. The
total bandwidth of an independent sideband emission (having B as the
first symbol), or a multiplexed image and phone emission, shall not exceed that of a
communications quality A3E emission."

For: ISB when it includes SSTV. (rarely used) I think the Harris ISB RF-301 has a 3KC or 3.3KC per sideband. - -but it is not an AM set so to speak. The wording is odd. "communications quality A3E". Is not an ISB voice +SSTV an A8W (A9W?) signal, not A3E. Or do they mean that it should not be wider than a communications quality AM signal?



========

Type of modulation
N    Unmodulated carrier
A    Double-sideband amplitude modulation (e.g. AM broadcast radio)
H    Single-sideband with full carrier (e.g. as used by CHU)
R    Single-sideband with reduced or variable carrier
J    Single-sideband with suppressed carrier (e.g. Shortwave utility and amateur stations)
B    Independent sideband (two sidebands containing different signals)
C    Vestigial sideband (e.g. NTSC)
F    Frequency modulation (e.g. FM broadcast radio)
G    Phase modulation
D    Combination of AM and FM or PM
P    Sequence of pulses without modulation
K    Pulse amplitude modulation
L    Pulse width modulation (e.g. as used by WWVB)
M    Pulse position modulation
Q    Sequence of pulses, phase or frequency modulation within each pulse
V    Combination of pulse modulation methods
W    Combination of any of the above
X    None of the above

Type of modulating signal
0    No modulating signal
1    One channel containing digital information, no subcarrier
2    One channel containing digital information, using a subcarrier
3    One channel containing analogue information
7    More than one channel containing digital information
8    More than one channel containing analogue information
9    Combination of analogue and digital channels
X    None of the above
Types 4 and 5 were removed from use with the 1982 Radio Regulations. In previous editions, they had indicated facsimile and video, respectively.

Type of transmitted information
N    No transmitted information
A    Aural telegraphy, intended to be decoded by ear, such as Morse code
B    Electronic telegraphy, intended to be decoded by machine (radioteletype and digital modes)
C    Facsimile (still images)
D    Data transmission, telemetry or telecommand (remote control)
E    Telephony (voice or music intended to be listened to by a human)
F    Video (television signals)
W    Combination of any of the above
X    None of the above

Details of information
A    Two-condition code, elements vary in quantity and duration
B    Two-condition code, elements fixed in quantity and duration
C    Two-condition code, elements fixed in quantity and duration, error-correction included
D    Four-condition code, one condition per "signal element"
E    Multi-condition code, one condition per "signal element"
F    Multi-condition code, one character represented by one or more conditions
G    Monophonic broadcast-quality sound
H    Stereophonic or quadraphonic broadcast-quality sound
J    Commercial-quality sound (non-broadcast)
K    Commercial-quality sound—frequency inversion and-or "band-splitting" employed
L    Commercial-quality sound, independent FM signals, such as pilot tones, used to control the demodulated signal
M    Greyscale images or video
N    Full-color images or video
W    Combination of two or more of the above
X    None of the above

Multiplexing
N    None used
C    Code-division (excluding spread spectrum)
F    Frequency-division
T    Time-division
W    Combination of Frequency-division and Time-division
X    None of the above

[k4kyv]

A wise man also checks his references before becoming a fool.

I looked up the actual statement I was quoting from memory:

A wise man once said, “Don’t argue with a fool for too long, because after a while, no-one can tell the difference between you.”

http://betterlifecoaching.wordpress.com/2011/03/08/arguing-with-fools/

========

Type of modulation
N    Unmodulated carrier
A    Double-sideband amplitude modulation (e.g. AM broadcast radio)
H    Single-sideband with full carrier (e.g. as used by CHU)
R    Single-sideband with reduced or variable carrier
J    Single-sideband with suppressed carrier (e.g. Shortwave utility and amateur stations)
B    Independent sideband (two sidebands containing different signals)
C    Vestigial sideband (e.g. NTSC)
F    Frequency modulation (e.g. FM broadcast radio)
G    Phase modulation
D    Combination of AM and FM or PM
P    Sequence of pulses without modulation
K    Pulse amplitude modulation
L    Pulse width modulation (e.g. as used by WWVB)
M    Pulse position modulation
Q    Sequence of pulses, phase or frequency modulation within each pulse
V    Combination of pulse modulation methods
W    Combination of any of the above
X    None of the above

Type of modulating signal
0    No modulating signal
1    One channel containing digital information, no subcarrier
2    One channel containing digital information, using a subcarrier
3    One channel containing analogue information
7    More than one channel containing digital information
8    More than one channel containing analogue information
9    Combination of analogue and digital channels
X    None of the above
Types 4 and 5 were removed from use with the 1982 Radio Regulations. In previous editions, they had indicated facsimile and video, respectively.

Type of transmitted information
N    No transmitted information
A    Aural telegraphy, intended to be decoded by ear, such as Morse code
B    Electronic telegraphy, intended to be decoded by machine (radioteletype and digital modes)
C    Facsimile (still images)
D    Data transmission, telemetry or telecommand (remote control)
E    Telephony (voice or music intended to be listened to by a human)
F    Video (television signals)
W    Combination of any of the above
X    None of the above

Details of information
A    Two-condition code, elements vary in quantity and duration
B    Two-condition code, elements fixed in quantity and duration
C    Two-condition code, elements fixed in quantity and duration, error-correction included
D    Four-condition code, one condition per "signal element"
E    Multi-condition code, one condition per "signal element"
F    Multi-condition code, one character represented by one or more conditions
G    Monophonic broadcast-quality sound
H    Stereophonic or quadraphonic broadcast-quality sound
J    Commercial-quality sound (non-broadcast)
K    Commercial-quality sound—frequency inversion and-or "band-splitting" employed
L    Commercial-quality sound, independent FM signals, such as pilot tones, used to control the demodulated signal
M    Greyscale images or video
N    Full-color images or video
W    Combination of two or more of the above
X    None of the above

Multiplexing
N    None used
C    Code-division (excluding spread spectrum)
F    Frequency-division
T    Time-division
W    Combination of Frequency-division and Time-division
X    None of the above

Ah yes.  The revised emission designators. Once that system was adopted, AM, which had long been one of a half dozen or so emission types used by amateurs on HF, suddenly became "insignificant" as merely one of over 1300, according to the geniuses at the rulemaking division at the FCC as they continued to push their anti-AM crappola back in the 80s, and the non-technical lawyer type commissioners failed to see the deception.

[KM1H]

A wise man once said, “Don’t argue with a fool for too long, because after a while, no-one can tell the difference between you.”

Must have been written in Fort Fumble, aka DC.

[W2PFY]

A wise man once said, “Don’t argue with a fool for too long, because after a while, no-one can tell the difference between you.”

I'll bet he said it more than "once"...seems like it was shortened. didn't it end with" between you and the fool?

Tat's all folks!

[WD8BIL]

Actually it ends something to effect of;

"Once he (the fool) gets you down to his level he beats you up with experience!"

[KB5MD]

 ;)Maybe we should just move AM activity down to the "so-called" DX window.  Some nights there is little activity there.

[KM1H]

K1KW has been known to blast thru the slopbuckets down there on AM, JJ also I bet.

[Fred k2dx]

Yes, it does poke a hornets nest at times but oh well...

Sometimes the DX station doesn't even realize you are transmitting AM.

[k4kyv]

Yes, it does poke a hornets nest at times but oh well...

Sometimes the DX station doesn't even realize you are transmitting AM.

A couple of times I did that on 40m, then told the DX station what mode I was running, and he switched his ricebox over to AM; we carried on a 2-way AM conversation for 20 min. or longer, with the DX station running only about 20 watts.

[flintstone mop]

On a popular DX window on 40M there are QSO's taking place and most users know that there are times that folks are going to start listening for DX to role in using the grey line propagation. Many times the QSO will break and allow anyone who is trying to call DX to use the freq. There aren't any wars going on there.

[KB5MD]

Yes, it does poke a hornets nest at times but oh well...

   I've got just enough country boy left in me to poke one every now and then...

[k4kyv]

On a popular DX window on 40M there are QSO's taking place and most users know that there are times that folks are going to start listening for DX to role in using the grey line propagation. Many times the QSO will break and allow anyone who is trying to call DX to use the freq. There aren't any wars going on there.

A couple of times right after the broadcasters moved out, I was working AM on or about 7160, when a slopbucket came on and told me to "get that trash up to 7290 where it belongs. This is DX territory".  My response was, if he didn't think there was enough room in this part of the band for DX and AM activity, then he should petition the FCC to expand the phone band down to 7100, so US amateurs could actually use that sparsely populated segment of the band between 7100 and 7125 that CW stations rarely use.

[flintstone mop]

On a popular DX window on 40M there are QSO's taking place and most users know that there are times that folks are going to start listening for DX to role in using the grey line propagation. Many times the QSO will break and allow anyone who is trying to call DX to use the freq. There aren't any wars going on there.

A couple of times right after the broadcasters moved out, I was working AM on or about 7160, when a slopbucket came on and told me to "get that trash up to 7290 where it belongs. This is DX territory".  My response was, if he didn't think there was enough room in this part of the band for DX and AM activity, then he should petition the FCC to expand the phone band down to 7100, so US amateurs could actually use that sparsely populated segment of the band between 7100 and 7125 that CW stations rarely use.

Hi Don,
I understand that the demand to get out of the DX window was not what you wanted to get in reply to a CQ, BUT the folks trying to use the freq from other parts of the world would like to use the freq and try some grey line work. It's not like they can go to another clear spot and waste time calling when there is only about an hour in THEIR morning or THEIR evening to call CQ DX.
That part of the band is very usable in SE Asia and Down Under. They are very close to high power SW stations not too far up from that window. The USA is pretty tame on 40M and it is very useable.
While we were visiting the Philippines there was CW and voice all mixed up from other countries. Hams talking over CW QSO's, etc. There was some yapping taking place from some Aussies, but when one of them heard me calling the USA station, they broke off their QSO to let me take a crack at it. I was almost able to talk to a Ham in Fla using 100 W using grey line propagation. But noise levels were increasing and the time slipped by and I missed him. So it was really a Whirl Wide Gentlemen's agreement to keep 7160 clear during grey line conditions.
Fred

[KX5JT]

Maybe Don was trying to "take a crack at" some AM DX! 

It's so silly to hear "get out of the DX window" when I hear domestic SSB stations sitting there chatting for hours with maybe an occasional VK or ZL joining, this all over the lower portion of 40 (7.125 through 7.200) during dark hours.

[WD8BIL]

I've been known to break a few windows in my time!

[k4kyv]

Hi Don,
I understand that the demand to get out of the DX window was not what you wanted to get in reply to a CQ, BUT the folks trying to use the freq from other parts of the world would like to use the freq and try some grey line work. It's not like they can go to another clear spot and waste time calling when there is only about an hour in THEIR morning or THEIR evening to call CQ DX.

But they have the full range of frequencies between about 7060 and 7200 (everywhere except in USA), including loads of space below 7125 if they want to avoid Yanks.  And when propagation permits, you DO hear a lot of domestic slopbucketeers ragchewing in the lower part of the band, even during prime DX hours. Granted, DXing is a popular facet of 40m operation during the evening hours when propagation is good into Europe now that (most) broadcasters have vacated, but the DXers don't own the entire band.

If there is a "DX window" on 40m in the US, I would say that it lies between 7125 and 7150, and/or maybe somewhere between 7175 and 7200 to allow the Generals to participate.

[Pete, WA2CWA]

I don't believe there is a SSB/phone "DX Window" on 40 meters.
40 bandplan: http://www.bandplans.com/index.php?band=40

[WD8BIL]

So it was really a Whirl Wide Gentlemen's agreement to keep 7160 clear during grey line conditions.

I wasn't around when these gentlemen, whoever they are, made their so called agreement.

[Steve - K4HX]

There is no window and I've never heard of any gentlemans' agreement on 7160. I've been very active on 40 meters in that frequency range since 2009 (approximately 4000 contacts).

I don't believe there is a SSB/phone "DX Window" on 40 meters.
40 bandplan: http://www.bandplans.com/index.php?band=40

[Todd, KA1KAQ]

Considering that the broadcasters only vacated that part of the band in March of 2009 it seems dubious at best. As I recall, 7.160 was an AM gathering spot some years ago as well, long before any DX claims. So any 'agreement' is between DXers and no one else. They should expect no more special treatment than anyone else gets. This 'I get special treatment to enjoy my favorite aspect of the hobby' is only as valid if everyone else gives up their right to use that portion of the band. Right up there with the 'this is out NET frequency' BS. 

[K5UJ]

you did not get the memo that said chasing dx is the single most important thing in ham radio?   has priority over everything else 

[k4kyv]

you did not get the memo that said chasing dx is the single most important thing in ham radio?   has priority over everything else 

No, I thought QuaRMtesting was.

[WA3VJB]

In the months after the FCC reapportioned the 80 and 40 meter bands, I had fun saying I thought the new regulations said only full carrier DSB AM was allowed in the expanded phone segments.

Maybe it's time to bluff that again with encounters around 7160Kc.

[steve_qix]

In the months after the FCC reapportioned the 80 and 40 meter bands, I had fun saying I thought the new regulations said only full carrier DSB AM was allowed in the expanded phone segments.

Maybe it's time to bluff that again with encounters around 7160Kc.

I like it!