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CX2SA > SATDIG 28.04.11 05:48l 885 Lines 31586 Bytes #999 (0) @ WW
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Sent: 110428/0342Z @:CX2SA.LAV.URY.SA #:2287 [Minas] FBB7.00e $:AMSATBB6245
From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: PayPal Embed Code (Zachary Beougher)
2. Re: searching advice on low pass filter for 146 MHz (i8cvs)
3. Re: VX-3 on FM Sats (Ronald Nutter)
4. Re: Hector CO6CBF EL92 (Patrick STODDARD (WD9EWK/VA7EWK))
5. Re: Surplus cavity bandpass filters from the AO-10 era? (i8cvs)
6. -Importations- CO6CBF Hector (hmartinez@xxx.xxx.xxx
7. Re: searching advice on low pass filter for 146 MHz (Jim Sanford)
8. Re: searching advice on low hpass filter for 146 MHz (i8cvs)
9. Re: Hector CO6CBF EL92 (saguaroastro@xxx.xxxx
10. Re: Hector CO6CBF EL92 an off-line reply (Gkcarr)
11. Re: Icom D-Star (Eric Christensen)
12. Re: Icom D-Star (Tony Langdon)
13. Re: Icom D-Star (Ben Jackson)
14. Re: VX-3 on FM Sats (Ronald Nutter)
----------------------------------------------------------------------
Message: 1
Date: Wed, 27 Apr 2011 15:02:12 -0400
From: "Zachary Beougher" <zack.kd8ksn@xxxxxxx.xxx>
Subject: [amsat-bb] Re: PayPal Embed Code
To: "Clint Bradford" <clintbradford@xxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <SNT111-DS186B0FECFA29BB27563DFDB3980@xxx.xxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Insert HTML.... They also gave you the option of Java script, but I did
HTML.
-----Original Message-----
From: Clint Bradford
Sent: Wednesday, April 27, 2011 2:42 PM
To: AMSAT BB
Subject: [amsat-bb] PayPal Embed Code
>> ... PayPal widget won;t show up ...
You have the "visitor globe" there - was that an "insert html" or an "insert
source code" task?
Does your blog admin panel have a "insert widget" choice?
Clint
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. 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
------------------------------
Message: 2
Date: Wed, 27 Apr 2011 21:49:45 +0200
From: "i8cvs" <domenico.i8cvs@xxx.xx>
Subject: [amsat-bb] Re: searching advice on low pass filter for 146
MHz
To: "Steve Meuse" <smeuse@xxxx.xxx>, "Werner Kullmann, HB9BNK"
<hb9bnk@xxxx.xx>
Cc: Amsat - BBs <amsat-bb@xxxxx.xxx>
Message-ID: <002f01cc0514$43a6ee40$0401a8c0@xxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Hi Steve, N1JFU
A tuned stub 1/4 wave long open to the other end and inline with
the feedline will be too large in responce and it will attenuate the
same amount of dB both 145.900 MHz and 147.300 MHz
73" de
i8CVS Domenico
----- Original Message -----
From: "Steve Meuse" <smeuse@xxxx.xxx>
To: "Werner Kullmann, HB9BNK" <hb9bnk@xxxx.xx>
Cc: <amsat-bb@xxxxx.xxx>
Sent: Wednesday, April 27, 2011 8:35 PM
Subject: [amsat-bb] Re: searching advice on low pass filter for 146 MHz
> Werner Kullmann, HB9BNK expunged (hb9bnk@xxxx.xxxx
>
> > What an amazing responsetime on this list !
> >
> > (post the question, go shopping, find valuable advice !)
> >
> > thank you all very much !
>
> Since you have plenty of gainr, one cheap alternative might be to try a
tuned stub inline with the feedline.
>
> -Steve
>
> N1JFU - http://n1jfu.blogspot.com - smeuse@xxxxxxx
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. 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
------------------------------
Message: 3
Date: Wed, 27 Apr 2011 15:05:59 -0500
From: "Ronald Nutter" <rnutter@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: VX-3 on FM Sats
To: "Clint Bradford" <clintbradford@xxx.xxx>
Cc: AMSAT BB <amsat-bb@xxxxx.xxx>
Message-ID:
<74255d9d6696fa895c79631c97c04455.squirrel@xxxxx.xxxxxx.xxx>
Content-Type: text/plain;charset=iso-8859-1
Clint:
I thought it would. I ran into someone who was adament that the mod had
to be done. I ahve the VX-3R in my hands and saw the specs in the book
that said it would work. Just trying to make sure that I have the T's
crossed and the I's dotted.
Ron
> Even the VX-3E for the European market transmits 144-146 / 430-440 and
> receives everything.
>
> Clint
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. 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
>
------------------------------
Message: 4
Date: Wed, 27 Apr 2011 13:11:31 -0700
From: "Patrick STODDARD (WD9EWK/VA7EWK)" <amsat-bb@xxxxxx.xxx>
Subject: [amsat-bb] Re: Hector CO6CBF EL92
To: amsat-bb@xxxxx.xxx
Message-ID: <BANLkTinGFY9CU=2AOR-=jrE874vi_u=X5g@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Hi Dave!
> ?I have a Yaesu FT-51R that I would be happy to give to Hector. Is there a
> Canadian ham that I can ship it to and have them reship to Hector?
Please make sure to get in touch with Hector *before* anything is sent
or taken to Cuba. It appears that there may be a permit or license that
is required before the radio can be legally imported in Cuba. See:
http://www.mycubatrip.com/info/customs.htm
The following link (in Spanish) from Cuban Customs:
http://www.aduana.co.cu/envios/noenvios.htm
backs up what is explained in English on the first link.
I'm no lawyer, and no expert on Cuban law or customs regulations, but
let's make sure we don't put Hector in hot water unintentionally. With
that said, maybe there is a way a radio like this one can get down there
so Hector can have an easier time working the FM birds.
73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
------------------------------
Message: 5
Date: Wed, 27 Apr 2011 22:46:31 +0200
From: "i8cvs" <domenico.i8cvs@xxx.xx>
Subject: [amsat-bb] Re: Surplus cavity bandpass filters from the AO-10
era?
To: "Bill Dzurilla" <billdz.geo@xxxxx.xxx>, "Amsat - BBs"
<amsat-bb@xxxxx.xxx>
Message-ID: <008c01cc051c$3088da00$0401a8c0@xxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
----- Original Message -----
From: "Bill Dzurilla" <billdz.geo@xxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Wednesday, April 27, 2011 7:00 PM
Subject: [amsat-bb] Surplus cavity bandpass filters from the AO-10 era?
> In attempting to make a list of ham equipment I have owned in the past, I
> recalled with fondness a surplus cavity bandpass filter I used with OSCAR
> 10. At the time, in the 1980s, these were cheap and quite popular with
> satellite users. I was living in downtown New Orleans, and the filter,
> which was mounted at the antenna next to the mast-mounted preamp, totally
> eliminated my problems with birdies and local cross-mod.
>
> Does anyone recall this filter and perhaps have a photo or info?
>
> 73, Bill NZ5N
Hi Bill, NZ5N
What you describes is exacly what I did for AO-10 and AO-13 mounting between
the 2 meter antenna and the preamplifier input a big passband cavity for FM
repeaters tuned on 145.900 MHz satellite center frequency and another
similar cavity tuned as a notch filter to 145.200 MHz to suck the strong
local signals desensing my receiver due to QRO Hams using high power for
local QSO's in FM.
I still use the above setup to receive VO-52 and OSCAR-7 and it works very
well. In addition I have homemade Norton circuit 2 meter preamplifiers
having high dinamic range and 2 meter convertes using MCL double balanced
mixers having very high -1 dB compression point to reduce overload and
intermodulation distorsion from very strong nearby signals.
To show local friends how it was nice to work satellites with the above
setup I remember I was able to receive OSCAR-13 at 145.950 MHz in SSB
and simultaneously retransmit this signal at 145.200 MHz FM using 10 watt
over another 2 meters antenna on my roof without to desense OSCAR-13
Actually no way to receive satellites in 2 meters band using a commercial
receivers or tranceivers here in the bay of Naples wich is full of powerfull
FM users ! !
73" de
i8CVS Domenico
------------------------------
Message: 6
Date: Wed, 27 Apr 2011 17:45:25 -0400 (EDT)
From: hmartinez@xxx.xxx.xx
Subject: [amsat-bb] -Importations- CO6CBF Hector
To: amsat-bb@xxxxx.xxx
Message-ID: <2446.10.14.32.18.1303940725.squirrel@xxxxxx.xxx.xxx.xx>
Content-Type: text/plain; charset="utf-8"
Thanks to everybody
for your help!!!
?
The restrictions
about the importation of amateur radios to my country are the same from all
countries of
the world. The problem consists:
?
The only way that I
can use for import a radio at my country is bringing it myself or bringing
it another
Ham of my country with amateur radio license active. Amateur radio equipment
importations are not permitted for common people neither by mailings.
?
Fortunately for me,
I have heard that here in my city a Ham will be visiting USA soon, and I
could ask to
him this help.
?
Thanks for your
help
?
Hector, CO6CBF
?
Hi Dave!
> ?I have a Yaesu
FT-51R that I would be happy to give to Hector. Is there a
> Canadian ham that
I can ship it to and have them reship to Hector?
Please make sure to get in
touch with Hector *before* anything is sent
or taken to Cuba. It appears that
there may be a permit or license that
is required before the radio can be legally
imported in Cuba. See:
http://www.mycubatrip.com/info/customs.htm
The following link (in Spanish) from Cuban Customs:
http://www.aduana.co.cu/envios/noenvios.htm
backs up what is explained in
English on the first link.
I'm no lawyer, and no expert on Cuban law or
customs regulations, but
let's make sure we don't put Hector in hot water
unintentionally. With
that said, maybe there is a way a radio like this one can
get down there
so Hector can have an easier time working the FM birds.
73!
Patrick WD9EWK/VA7EWK
http://www.wd9ewk.net/
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx. 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
***************************************
Genius is one per cent inspiration,
and ninety-nine per cent
perspiration.
-- Thomas A. Edison
***************************************
---
Free the Cuban Five!
http://www.injusticia.cubaweb.cu/, http://www.antiterroristas.cu/
Participe en Universidad 2012, del 13 al 17 de febrero de 2012. Habana, Cuba.
http://www.congresouniversidad.cu/
Consulte la Enciclopedia Colaborativa Cubana: http://www.ecured.cu/
------------------------------
Message: 7
Date: Wed, 27 Apr 2011 17:53:13 -0400
From: Jim Sanford <wb4gcs@xxxxx.xxx>
Subject: [amsat-bb] Re: searching advice on low pass filter for 146
MHz
To: "Werner Kullmann, HB9BNK" <hb9bnk@xxxx.xx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <4DB89049.9070009@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Werner:
I EMPHATICALLY agree with the advice to turn down the gain. Improving
your IMD will provide much more bang for the effort than trying to find
a filter with a loaded Q of over 100 at 2m.
An easy way (if imper
> thank you all very much !
>
> It will be a few days, until I can get at the antenna. I will
> report my findings here
>
> Thanks and
>
> 73 Werner, HB9BNK
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. 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
>
------------------------------
Message: 8
Date: Thu, 28 Apr 2011 00:07:37 +0200
From: "i8cvs" <domenico.i8cvs@xxx.xx>
Subject: [amsat-bb] Re: searching advice on low hpass filter for 146
MHz
To: "Werner Kullmann, HB9BNK" <hb9bnk@xxxx.xx>, "Amsat - BBs"
<amsat-bb@xxxxx.xxx>
Message-ID: <00d001cc0527$84f7d680$0401a8c0@xxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
----- Original Message -----
From: "Werner Kullmann, HB9BNK" <hb9bnk@xxxx.xx>
To: <amsat-bb@xxxxx.xxx>
Sent: Wednesday, April 27, 2011 3:41 PM
Subject: [amsat-bb] searching advice on low hpass filter for 146 MHz
> To improve the reception of the sats on 145.9xx MHz with my
> little yagi, I recently acquired a SSB-preamplifier SP-2000. To my
> dismay, the reception on my IC910H was intermittend heavily
> distorted.
>
> After a while I found, that a nearby located commercial
> transmitter (POCSAG) emitting bursts on 147.300 is so strong, that
> the frontend of the IC910H (or its AGC) practically quites the
> receiver on 145.900. When the bursts stop, reception resumes.
> Difficult to qso.
>
> I have experimented with a large cavity filter and found, that the
> impact of the bursts can be reduced, so that normal satellite work
> is possible again.
>
> Now I am looking for advice on how to build a steep low pass
> filter, eliminating everything above 146 MHz, to be mounted before
> the preamp on the mast. The filter must however be capable to
> accept the rf power, if I work in V/U mode.
>
> Thank you for any ideas !
>
> Werner, HB9BNK
Hi Werner , HB9BNK
Few years ago I was suffering the same problem and I fixed it using
cavity filters as passband filters and notch filters normally used in the
FM repeaters.
In addition I built high dinamic range Norton type preamplifiers and
high intercept point 2 meters converters using double balanced mixers.
At the end of the above succesfull experimentation I writes a few
technical articles covering the above matter published into the italian
Radio Rivista magazine of ARI that you can request as photocopy
at no cost to:
ARI Via Domenico Scarlatti, 31 20124 Milano Italy.
TEL 02 6692894 and FAX 02 67078923
Obviously the text is in italian but you will understand the drawings
the pictures and the schematic diagrams.
Radio Rivista march 1994 pagg 30 to 33
" " april " " 38 to 41
" " ch manufacturer STTA model FL.24.A .
it is 21 cm long and 22 mm in diameter including N connectors.
I have measured it with my spectrum analyser HP 8555A and tracking
generator HP 8444A and the results are the following:
Frequency (MHz) Insertion Loss (dB)
144 0.3
160 0.4
180 > 50
As you can realize even if the tubular filter rejects by more than 50 dB a
180 MHz signal from a 144 MHz signal it reject nothing between
144 MHz to 160 MHz and so in your case only a big passband cavity
filter tuned to 145.900 MHz plus another cavity filter tuned as a notch
to 147.200 MHz can do the job othervise you must remove the SP-2000
preamplifier wich in your situation is responsible to generate gain
compression and intermodulation distorsion.
Best 73" de
i8CVS Domenico
------------------------------
Message: 9
Date: Wed, 27 Apr 2011 18:47:37 -0400
From: <saguaroastro@xxx.xxx>
Subject: [amsat-bb] Re: Hector CO6CBF EL92
To: John Papay <john@xxxxxx.xxx>, amsat-bb@xxxxx.xxx
Message-ID: <20110427184737.06DSP.292059.imail@xxxxxxxxxxx>
Content-Type: text/plain; charset=utf-8
John,
The timing of your post was fortuitous. I'm just catching up on QSL's and I
had worked Hector on 2 Apr. I was about to send him an email asking how to
handle the QSL request. I'll keep my eyes on the mailbox.
Did you happen to note the calls he QSL'd? Might help someone who worked him
but doesn't get a card for whatever reason figure out the details.
It was nice to get Cuba in the books.
73
Rick K7TEJ
---- John Papay <john@xxxxxx.xxx> wrote:
> Hector, CO6CBF, made his first satellite QSO back on
> January 27th, 2011 on the AO-51 satellite. He didn't
> have much help getting started but he read and built an
> antenna and made that contact after he could successfully
> hear others on the satellite.
>
> I've only worked 3 Cuban stations, CO8TW in FL20, CO5LU in EL93
> and Hector CO6CBF in EL92. EL92 is rare. I did not have it and
> neither did KO4MA, K6YK or NI7P/exN7SFI. I sent the card to
> Hector before I did any research on the mail issues. It turns
> out that mail from Cuba to the USA has been suspended by the
> Cuban government due to delays with our TSA screening incoming
> mail. Cuba feels that this delay is unacceptable. You would
> think that mail from the USA to Cuba would be refused also but
> that is not the case. Hector reported being very surprised to
> receive a card from me with an IRC in tact. The mail from the
> USA to Cuba works. Sending IRC's is acceptable. Green stamps
> would not be acceptable.
>
> Now the problem was how to return cards from Cuba to the USA.
> Hector has friends that live in the US but visit Cuba from time
> to time. He was finally able to send a number of cards back with
> his friend and they in turn mailed them to me for distribution.
>
> There are 75 QSL cards in the mail now from Hector, CO6CBF. Just
> two of them are in envelopes received by Hector, however, he reports
> that since that time, he has received several envelopes from the US.
>
> There were a few cards with incorrect callsigns. I did my best to
> determine the intended recipient but there may be some errors on my
> part. If you get a card addressed to you for a contact you made with
> Hector but your callsign is wrong, simply send a card to him and he
> will send one back via the above mentioned process. Be patient.
>
> Please remember that Hector's first language is not English. If he gets
> your callsign wrong, it is likely due to your not using phonetics. There
> is no need to discuss phonetics; just use them when making a QSO with
Hector.
>
> The QSL cards are smaller than the standard QSL, 3-1/2" x 5-1/2". That is
> because the only printer that Hector has right now will not print that
> size. He is trying to fix another printer that will allow the full size
> card to be printed.
>
> Hector has shared his plans for future satellite grid operations. He
> will be trying to activate every grid in Cuba and may do some water grids
> as well. His biggest problem right now is a portable UHF radio. He has
> 2 meter portables but nothing to ild a uhf to 2meter downconverter that could be used with a 2m HT but the
> outcome is unknown. Anything you build for UHF receive has to be very
> sensitive as satellites run very low power. An HT would be the best
> solution.
>
> So if you are one of the lucky 73 who gets a QSL card from Hector,
unsolicited,
> please take the time to make one out and return it to him. He is trying to
> get his VUCC and it's a lot more difficult for him than it is for us. An
> IRC always helps. Please do not send cards to me.
>
> Thank you Hector for getting on the birds from Cuba. You have given many of
> us a new grid as well as a new DXCC entity!
>
> 73,
> John K8YSE
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. 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
------------------------------
Message: 10
Date: Wed, 27 Apr 2011 20:16:04 -0500
From: Gkcarr <gkcarr@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: Hector CO6CBF EL92 an off-line reply
To: "John Papay" <john@xxxxxx.xxx>, amsat-bb@xxxxx.xxx
Message-ID: <096e9f9dfd3eac34931df8d5a2f9503f@xxxxxxxxxx.xxx>
Content-Type: text/plain; charset="utf-8"
John, I worked Hector on 3/3 and 21/4.
I am sitting her wondering......I don't know anything about being a qsl
manager but wonder if I can help him out. Particularly if it helps him
achieve VUCC.
I could receive e-mail logs and check and respond to mail requests.
I keep up with my own cards, though the volume has dropped as more get EM30
and now abother station is in this grid.
And you know I am serious about the hamsats. I'd even pay for his batch of
qsl cards. That would not break me. Hi!
>From your post, it seems you have a relationship with Hector.
What do you think?
73
George
WA5KBH
-----Original message-----
From: saguaroastro@xxx.xxx
Date: Wed, 27 Apr 2011 22:47:37 -0500
To: John Papay john@xxxxxx.xxxx amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Hector CO6CBF EL92
> John,
>
> The timing of your post was fortuitous. I'm just catching up on QSL's and
I had worked Hector on 2 Apr. I was about to send him an email asking how to
handle the QSL request. I'll keep my eyes on the mailbox.
>
> Did you happen to note the calls he QSL'd? Might help someone who worked
him but doesn't get a card for whatever reason figure out the details.
>
> It was nice to get Cuba in the books.
>
> 73
> Rick K7TEJ
>
> ---- John Papay <john@xxxxxx.xxx> wrote:
> > Hector, CO6CBF, made his first satellite QSO back on
> > January 27th, 2011 on the AO-51 satellite. He didn't
> > have much help getting started but he read and built an
> > antenna and made that contact after he could successfully
> > hear others on the satellite.
> >
> > I've o7P/exN7SFI. I sent the card to
> > Hector before I did any research on the mail issues. It turns
> > out that mail from Cuba to the USA has been suspended by the
> > Cuban government due to delays with our TSA screening incoming
> > mail. Cuba feels that this delay is unacceptable. You would
> > think that mail from the USA to Cuba would be refused also but
> > that is not the case. Hector reported being very surprised to
> > receive a card from me with an IRC in tact. The mail from the
> > USA to Cuba works. Sending IRC's is acceptable. Green stamps
> > would not be acceptable.
> >
> > Now the problem was how to return cards from Cuba to the USA.
> > Hector has friends that live in the US but visit Cuba from time
> > to time. He was finally able to send a number of cards back with
> > his friend and they in turn mailed them to me for distribution.
> >
> > There are 75 QSL cards in the mail now from Hector, CO6CBF. Just
> > two of them are in envelopes received by Hector, however, he reports
> > that since that time, he has received several envelopes from the US.
> >
> > There were a few cards with incorrect callsigns. I did my best to
> > determine the intended recipient but there may be some errors on my
> > part. If you get a card addressed to you for a contact you made with
> > Hector but your callsign is wrong, simply send a card to him and he
> > will send one back via the above mentioned in Cuba and may do some water grids
> > as well. His biggest problem right now is a portable UHF radio. He has
> > 2 meter portables but nothing to take on the road for UHF. It is
unfortunate
> > that we cannot send him a radio due to restrictions, however, other
countries
> > like Canada and Mexico could. If there is anyone outside the US that has
> > a UHF portable that would cover the satellite band and would like to help
> > Hector, please consider sending it to him. He is trying to
> > build a uhf to 2meter downconverter that could be used with a 2m HT but
the
> > outcome is unknown. Anything you build for UHF receive has to be very
> > sensitive as satellites run very low power. An HT would be the best
> > solution.
> >
> > So if you are one of the lucky 73 who gets a QSL card from Hector,
unsolicited,
> > please take the time to make one out and return it to him. He is trying
to
> > get his VUCC and it's a lot more difficult for him than it is for us. An
> > IRC always helps. Please do not send cards to me.
> >
> > Thank you Hector for getting on the birds from Cuba. You have given
many of
> > us a new grid as well as a new DXCC entity!
> >
> > 73,
> > John K8YSE
> >
> > _______________________________________________
> > Sent via AMSAT-BB@xxxxx.xxx. 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
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. Opinions expressed are those of the author.
> Not an AMSAT-NA member? Join now to supporontent-Type: text/plain; charset="UTF-8"
On Wed, 2011-04-27 at 09:00 -0500, Gregg Wonderly wrote:
> This is one of those experimentation moments. Not everyone is happy with
where
> it is at, but without some more participation, those experimenting now
will be
> the ones setting the standards, and if you are not happy with those
results, it
> will be your fault not theirs, because you chose not to participate.
I'd like to point out that it's difficult, at best, to participate when
you can't "roll your own". There are many codecs available out there
today that don't require purchasing a license to use. The biggest
problem right now is that D-Star isn't backward compatible or you could
implement one of those freely-licensed codecs now and let people design
their own implementation.
Packet radio, however, is a good example of an open project. AX25 is
the basis for packet radio and since the specification was released it
allowed anyone to design and develop their own software and hardware
systems. Take a subset of that project, APRS, and you'll see this even
more. How many software clients are out there that use the APRS
specification as a means to communicate with other APRS users? Kenwood,
Byonics, and Yaesu, among others, have all made hardware devices
utilizing the APRS and AX25 open specifications and more will come.
Open is better and until all the pieces are freely available you won't
catch one of these devices on my side.
--Eric W4OTN
------------------------------
Message: 12
Date: Thu, 28 Apr 2011 12:33:47 +1000
From: Tony Langdon <vk3jed@xxxxx.xxx>
Subject: [amsat-bb] Re: Icom D-Star
To: amsat-bb@xxxxx.xxx
Message-ID: <4db8d212.c93a440a.1e62.56c1@xx.xxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
At 11:33 AM 4/28/2011, you wrote:
>I'd like to point out that it's difficult, at best, to participate when
>you can't "roll your own". There are many codecs available out there
>today that don't require purchasing a license to use. The biggest
>problem right now is that D-Star isn't backward compatible or you could
>implement one of those freely-licensed codecs now and let people design
>their own implementation.
Tell that to the likes of G4KLX, KI4LKF, the ircDDB team, PA4YBR, the
designers and builders of various GMSK modems, and even AA4RC and
Moe, who designed the DV Dongle hardware (not to mention those who
are building their own Dongles). Sure, the codec is proprietary, but
there are implementations available, from a bare chip (at around $20)
to the DV Dongle for people to play with. And there's a LOT of
tinkering to be done without even decoding the audio, as many of the
above people can attest to first hand. As far as I'm concerned, this
argument is a furphy. There are open source implementations for just
about everything else - gateways, repeaters, GMSK modem (using a
soundcard), routing advertisements (ircDDB), everything except DPlus
(though there is an open source functional equivalent - DExtra).
73 de VK3JED / VK3IRL
http://vkradio.com
------------------------------
Message: 13
Date: Wed, 27 Apr 2011 22:42:49 -0400
From: Ben Jackson <bbj@xxxxxxxx.xxx>
Subject: [amsat-bb] Re: Icom D-Star
To: Eric Christensen <eric@xxxxxxxxxxxxxxxx.xx>
Cc: amsat-bb@xxxxx.xxxx Gordon JC Pearce <gordonjcp@xxxx.xxx>
Message-ID: <4DB8D429.9010909@xxxxxxxx.xxx>
Content-Type: text/plain; charset=UTF-8; format=flowed
On 04/27/2011 09:33 PM, Eric Christensen wrote:
> On Wed, 2011-04-27 at 09:00 -0500, Gregg Wonderly wrote:
>> This is one of those experimentation moments. Not everyone is happy with
where
>> it is at, but without some more participation, those experimenting now
will be
>> the ones setting the standards, and if you are not happy with those
results, it
>> will be your fault not theirs, because you chose not to participate.
>
> I'd like to point out that it's difficult, at best, to participate when
> you can't "roll your own".
See, while I don't like AMBE, that's a bunch of shenanigans. You can
roll your own stuff with D-STAR:
http://www.gmskhotspot.com/
http://www.w9arp.com/hotspot/
http://www.d-star.asia/index.html.en
> Packet radio, however, is a good example of an open project. AX25 is
> the basis for packet radio and since the specification was released it
> allowed anyone to design and develop their own software and hardware
> systems. Take a subset of that project, APRS, and you'll see this even
> more. How many software clients are out there that use the APRS
> specification as a means to communicate with other APRS users? Kenwood,
> Byonics, and Yaesu, among others, have all made hardware devices
> utilizing the APRS and AX25 open specifications and more will come.
D-STAR *is* an open protocol. D-STAR Audio, however, has a codec that is
encumbered by patents, I'm not touching AMBE, but I enjoy the idea of a
digital data mode developed within the past decade. Don't throw the baby
out with the bathwater.
--
Ben Jackson - N1WBV - New Bedford, MA
bbj <at> innismir.net - http://www.innismir.net/
------------------------------
Message: 14
Date: Wed, 27 Apr 2011 22:38:31 -0500
From: Ronald Nutter <rnutter@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: VX-3 on FM Sats
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Cc: Clint Bradford <clintbradford@xxx.xxx>
Message-ID: <4DB8E137.60709@xxxxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Got the VX-3R configured and charged before a near 90 degree pass from
SO-50. I figured this would be a good worst case scenario test to start
with.
I was able to hear about a 1/3 of the pass (I had heavy foliage on both
horizons).
I worked a station in Tx doing a sat demo and heard several others.
Used the Smiley whip antenna that was recommended to me.
Never really expected that to work as well as it did.
Using a Pelican 1120 case, I now have a very portable satellite kit also
including a TH-F6A, an iPod touch and a digital recorder.
Will be updating my website in a few days with pictures.
Makes a very nice travel kit to use instead of having to take larger
handhelds and an arrow antenna.
Ron
On 4/27/11 3:05 PM, Ronald Nutter wrote:
> Clint:
>
> I thought it would. I ran into someone who was adament that the mod had
> to be done. I ahve the VX-3R in my hands and saw the specs in the book
> that said it would work. Just trying to make sure that I have the T's
> crossed and the I's dotted.
>
> Ron
>
>> Even the VX-3E for the European market transmits 144-146 / 430-440 and
>> receives everything.
>>
>> Clint
>> _______________________________________________
>> Sent via AMSAT-BB@xxxxx.xxx. 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
>>
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. 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
>
------------------------------
_______________________________________________
Sent via amsat-bb@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
http://amsat.org/mailman/listinfo/amsat-bb
End of AMSAT-BB Digest, Vol 6, Issue 245
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