Hello folks, Linear satellites are getting a bit thin on the ground lately arn't they - and what with the (hopefully) temporary demise of AO-51 (a software reload) there's not much a satellite operator can do other than to make an appearance on AO-7 or VO-52.
Therefore, I wrote the following 'missive' as a suggestion, so, instead of whinging, you can can get off your bum and chuck together a small interface for your FM handheld and try some QRP operating - you just might surprise yourself.
While predominantly aimed at European operators I added this to the amsat-bb because there are a *LOT* of potential 'linear' folks among the FM operators "over there".
Do please take the time to learn a little about power budgets and aerial gain etc.
73 John. [email protected] ..................................................................................................
OBSERVATIONS FROM NORWAY LA2QAA 14 January 2008 An experiment,
As many of us are aware, the average age of Hams is creeping up and satellite operators are no exception - we're heading faster toward 'extinction' as opposed to distinction.
The much debated 'no code' exam - (to encourage more younger amateurs) - has, IMHO - had the complete opposite effect. With MSN and SMS why bother with Amateur Radio? ... the answer would be ... to do something you *CAN'T* do on your pet computer.
So what can be done to turn around the negative trend of this sad state of affairs?. I don't pretend to have all the answers ... however ...
One possible solution is to attract more of the 'FM only' amateurs onto linear satellites, to explore other means of communication so that they're not 'stuck' with the boring 'single user' solution.
The usual fly in the ointment excuse, here is ... "but I haven't got any gear capable of for example CW" ... which is of course an excuse that is as weak as 'hiss' with a capital P.
It is perfectly feasible to modulate an FM signal by switching on and off the carrier ... some people have used the PTT button to achieve this but a more elegant solution is to feed a controlled CW signal directly into the microphone input of an FM ... A.K.A. MCW modulation.
Ahh! ... anti-social behaviour you say, sending 'FM' on a linear satellite - due to the power budget, since FM is a 100% duty cycle mode ...
BUT !!! ... if one were to QRP by 25% as well as increase the aerial efficiency by 25% - (or any permutation giving the same results) - one would *NOT* be 'hogging' any more of the available transponder power than one normally would on a linear satellite.
Remember, the difference between a satellite signal at the horizon and at TCA ( time of closest approach) - is quite dramatic ... (not that many people bother to regulate their power for ... "enough to do the job" ... or, as Bill used to say ... "Tis' vain to do with more, that which can be done with less".
("Bill" = William of Occam 1347).
Regular users of AO-7 will be aware that while activity has increased this last 12 months in the afternoon and evening passes, the morning passes are still for all intents and purposes devoid of any signal at all.
The increased use of AO-7 is most likely due to a lack of other 'linear' satellites, VO-52's apparent lack of activity is most probably due to the low orbit which results in an increased Doppler rate and smaller footprint. AO-7 does provide for 6500km footprints on a daily basis.
Due to above "waffling" ... I intend to conduct a few QRP FM experiments on the mode-B morning passes. If you happen to hear an AO-7 'woodpecker' you might like to try switching to FM for a moment to see if you can hear some CW.
As long as you keep your power low ... (LIMA - OSCAR - WHISKEY folks) ... QRP PLEASE ... you signal won't be any more detrimental than a CW or SSB one. Of course, you *WILL* have to take the bananas out of your ears and use them as they were intended ... to listen !!!!!.
73 John. [email protected]
On Jan 15, 2008, at 3:25 AM, John Hackett wrote:
OBSERVATIONS FROM NORWAY LA2QAA 14 January 2008 An experiment,
As many of us are aware, the average age of Hams is creeping up and satellite operators are no exception - we're heading faster toward 'extinction' as opposed to distinction.
My own opinions on this matter fall somewhere between rosy optimism and dire pessimism. Amateur radio is certainly changing, but it would be a sad, sad thing if it were not. We should be concerned about the greying of our population, but we shouldn't panic about it. If we were really concerned about numbers, we'd remove licensing requirements entirely and find manufacturers to package radios to look like cell phones. That would help swell our numbers, but it wouldn't really be amateur radio any more.\
The much debated 'no code' exam - (to encourage more younger amateurs) - has, IMHO - had the complete opposite effect. With MSN and SMS why bother with Amateur Radio? ... the answer would be ... to do something you *CAN'T* do on your pet computer.
Morse code should have been dropped long ago. While a fun mode (for some at least), it occupied a special niche in the regulations which far exceeded any practical reason for its retention. On the other hand, the idea that Morse kept large numbers of young people _differentially_ from becoming hands is, I admit, rather absurd.
So what can be done to turn around the negative trend of this sad state of affairs?. I don't pretend to have all the answers ... however ...
One possible solution is to attract more of the 'FM only' amateurs onto linear satellites, to explore other means of communication so that they're not 'stuck' with the boring 'single user' solution.
I must admit that I'm a little dismayed by the constant barrage of negative comments that people seem to heap on the FM sats in this forum. I've been having a blast operating QRP style with a Kenwood TH-D7A and my trusty Arrow. From my QTH in CM87, I've worked Hawaii, Socorros Island, Fairbanks, Manitoba, South Carolina: it's been a blast. Yes, they are single user satellites, and they can be crowded, but I've also had to call CQ on AO-51 a couple of times in the past month (before it crashed, sigh) because nobody was on the bird.
The usual fly in the ointment excuse, here is ... "but I haven't got any gear capable of for example CW" ... which is of course an excuse that is as weak as 'hiss' with a capital P.
It is perfectly feasible to modulate an FM signal by switching on and off the carrier ... some people have used the PTT button to achieve this but a more elegant solution is to feed a controlled CW signal directly into the microphone input of an FM ... A.K.A. MCW modulation.
Ahh! ... anti-social behaviour you say, sending 'FM' on a linear satellite - due to the power budget, since FM is a 100% duty cycle mode ...
BUT !!! ... if one were to QRP by 25% as well as increase the aerial efficiency by 25% - (or any permutation giving the same results) - one would *NOT* be 'hogging' any more of the available transponder power than one normally would on a linear satellite.
I must admit, that's a novel suggestion that I had not heard of before. But doesn't this idea hog more of the available *bandwidth* on the transponder? I'd think that would be considered rather anti-social as well. Is this kind of operation considered kosher?
Remember, the difference between a satellite signal at the horizon and at TCA ( time of closest approach) - is quite dramatic ... (not that many people bother to regulate their power for ... "enough to do the job" ... or, as Bill used to say ... "Tis' vain to do with more, that which can be done with less".
("Bill" = William of Occam 1347).
Regular users of AO-7 will be aware that while activity has increased this last 12 months in the afternoon and evening passes, the morning passes are still for all intents and purposes devoid of any signal at all.
The increased use of AO-7 is most likely due to a lack of other 'linear' satellites,
Well, and the rather interesting "cool" factor of working on a 30+ year old satellite.
VO-52's apparent lack of activity is most probably due to the low orbit which results in an increased Doppler rate and smaller footprint. AO-7 does provide for 6500km footprints on a daily basis.
Which is another reason that it's pretty neat to work.
Due to above "waffling" ... I intend to conduct a few QRP FM experiments on the mode-B morning passes. If you happen to hear an AO-7 'woodpecker' you might like to try switching to FM for a moment to see if you can hear some CW.
I'll have a listen.
As long as you keep your power low ... (LIMA - OSCAR - WHISKEY folks) ... QRP PLEASE ... you signal won't be any more detrimental than a CW or SSB one. Of course, you *WILL* have to take the bananas out of your ears and use them as they were intended ... to listen !!!!!.
I'm curious though: you began this message with a cry that we need to get more young people involved in amateur radio, and this was apparently your suggestion. In what way do you think this suggestion accomplishes your goals? Yes, it allows people to work a different mode on a satellite that they may not be familiar with, but it isn't exactly the friendliest or even the most useful path to satellites, and I don't see how it addresses anything specifically of interest to young people. Did I miss something?
Mark
73 John. [email protected]
Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
Mark, You said ...
<I don't see how it addresses anything specifically <of interest to young people. Did I miss something?
I think you may have missed the point about being able to do something you 'couldn't' do on a computer with MSN or a mobile phone with SMS - (which seem to be the main tools of communication of the younger generation today).
Also ... I did specifically say ...
"I don't pretend to have all the answers ... however ... one possible solution is to attract more of the 'FM only' amateurs onto linear satellites, to explore other means of communication so that they're not 'stuck' with the boring 'single user' solution.
Further, I entitled the message - "SUGGESTION" - it wasn't meant as anything more than that.
BTW ... FM "bandwidth" isn't much of an issue if the transponder is 'empty' - (as I mentioned for the mid-morning passes). Excessive power is far more detremental.
73 John. [email protected] ..............................................................................................
CC: [email protected]; [email protected] From: [email protected] To: [email protected] Subject: Re: [amsat-bb] Observations From Norway. Date: Tue, 15 Jan 2008 08:40:04 -0800
On Jan 15, 2008, at 3:25 AM, John Hackett wrote:
OBSERVATIONS FROM NORWAY LA2QAA 14 January 2008 An experiment,
As many of us are aware, the average age of Hams is creeping up and satellite operators are no exception - we're heading faster toward 'extinction' as opposed to distinction.
My own opinions on this matter fall somewhere between rosy optimism and dire pessimism. Amateur radio is certainly changing, but it would be a sad, sad thing if it were not. We should be concerned about the greying of our population, but we shouldn't panic about it. If we were really concerned about numbers, we'd remove licensing requirements entirely and find manufacturers to package radios to look like cell phones. That would help swell our numbers, but it wouldn't really be amateur radio any more.\
The much debated 'no code' exam - (to encourage more younger amateurs) - has, IMHO - had the complete opposite effect. With MSN and SMS why bother with Amateur Radio? ... the answer would be ... to do something you *CAN'T* do on your pet computer.
Morse code should have been dropped long ago. While a fun mode (for some at least), it occupied a special niche in the regulations which far exceeded any practical reason for its retention. On the other hand, the idea that Morse kept large numbers of young people _differentially_ from becoming hands is, I admit, rather absurd.
So what can be done to turn around the negative trend of this sad state of affairs?. I don't pretend to have all the answers ... however ...
One possible solution is to attract more of the 'FM only' amateurs onto linear satellites, to explore other means of communication so that they're not 'stuck' with the boring 'single user' solution.
I must admit that I'm a little dismayed by the constant barrage of negative comments that people seem to heap on the FM sats in this forum. I've been having a blast operating QRP style with a Kenwood TH-D7A and my trusty Arrow. From my QTH in CM87, I've worked Hawaii, Socorros Island, Fairbanks, Manitoba, South Carolina: it's been a blast. Yes, they are single user satellites, and they can be crowded, but I've also had to call CQ on AO-51 a couple of times in the past month (before it crashed, sigh) because nobody was on the bird.
The usual fly in the ointment excuse, here is ... "but I haven't got any gear capable of for example CW" ... which is of course an excuse that is as weak as 'hiss' with a capital P.
It is perfectly feasible to modulate an FM signal by switching on and off the carrier ... some people have used the PTT button to achieve this but a more elegant solution is to feed a controlled CW signal directly into the microphone input of an FM ... A.K.A. MCW modulation.
Ahh! ... anti-social behaviour you say, sending 'FM' on a linear satellite - due to the power budget, since FM is a 100% duty cycle mode ...
BUT !!! ... if one were to QRP by 25% as well as increase the aerial efficiency by 25% - (or any permutation giving the same results) - one would *NOT* be 'hogging' any more of the available transponder power than one normally would on a linear satellite.
I must admit, that's a novel suggestion that I had not heard of before. But doesn't this idea hog more of the available *bandwidth* on the transponder? I'd think that would be considered rather anti-social as well. Is this kind of operation considered kosher?
Remember, the difference between a satellite signal at the horizon and at TCA ( time of closest approach) - is quite dramatic ... (not that many people bother to regulate their power for ... "enough to do the job" ... or, as Bill used to say ... "Tis' vain to do with more, that which can be done with less".
("Bill" = William of Occam 1347).
Regular users of AO-7 will be aware that while activity has increased this last 12 months in the afternoon and evening passes, the morning passes are still for all intents and purposes devoid of any signal at all.
The increased use of AO-7 is most likely due to a lack of other 'linear' satellites,
Well, and the rather interesting "cool" factor of working on a 30+ year old satellite.
VO-52's apparent lack of activity is most probably due to the low orbit which results in an increased Doppler rate and smaller footprint. AO-7 does provide for 6500km footprints on a daily basis.
Which is another reason that it's pretty neat to work.
Due to above "waffling" ... I intend to conduct a few QRP FM experiments on the mode-B morning passes. If you happen to hear an AO-7 'woodpecker' you might like to try switching to FM for a moment to see if you can hear some CW.
I'll have a listen.
As long as you keep your power low ... (LIMA - OSCAR - WHISKEY folks) ... QRP PLEASE ... you signal won't be any more detrimental than a CW or SSB one. Of course, you *WILL* have to take the bananas out of your ears and use them as they were intended ... to listen !!!!!.
I'm curious though: you began this message with a cry that we need to get more young people involved in amateur radio, and this was apparently your suggestion. In what way do you think this suggestion accomplishes your goals? Yes, it allows people to work a different mode on a satellite that they may not be familiar with, but it isn't exactly the friendliest or even the most useful path to satellites, and I don't see how it addresses anything specifically of interest to young people. Did I miss something?
Mark
73 John. [email protected]
Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
John - Why not do both, that is key the PTT and inject a tone into the audio, resulting in a MCW signal with no more duty cycle than a CW signal?
I remember a lot of keyed FM signals on Oscar 7 the first time around. Lots of chirp accompanied by enthusiasm. :^)= - Duffey -- James Duffey KK6MC/5 Cedar Crest NM 87008 DM65
James, That's what I meant but it looks like I didn't express myself very well, sorry! - however, in my defence, I do recall I mentioned MCW.
Already had a few negative "comments" re: my suggestion but I'm an old fart and I'm *not* going to apologise for it.
I've been telling people for years !!! my last remaining active braincell is on it's last legs ... like AO-7, I only operate in sunlight !!.
As long as it's fun and I'm not doing anybody any harm nor stepping on anyones toes other than verbally - why not !!!.
73 John. [email protected] ........................................................................................
CC: [email protected]; [email protected]; [email protected] From: [email protected] Subject: Re: [amsat-bb] Observations From Norway. Date: Tue, 15 Jan 2008 18:45:32 -0700 To: [email protected]
John - Why not do both, that is key the PTT and inject a tone into the audio, resulting in a MCW signal with no more duty cycle than a CW signal?
I remember a lot of keyed FM signals on Oscar 7 the first time around. Lots of chirp accompanied by enthusiasm. :^)= - Duffey -- James Duffey KK6MC/5 Cedar Crest NM 87008 DM65
participants (3)
-
James Duffey -
John Hackett -
Mark Vandewettering