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CX2SA > SATDIG 15.03.08 23:00l 350 Lines 13035 Bytes #999 (0) @ WW
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Subj: AMSAT-BB-digest V3 135
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From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. Lo-19 beacon (Auke de Jong, VE6PWN)
2. 220 MHz Radios and Region 2 Hams (James Duffey)
3. Pass prediction software requirement (David)
4. 220 MHz Radios and Region 2 Hams (G8IFF/KC8NHF)
5. NZ5N/HR status ?? (Alvaro de Leon Romo)
6. Re: 220 MHz Radios and Region 2 Hams - 219 to 220 MHz data
only? (Tyler Harpster)
7. Re: 220 MHz Radios and Region 2 Hams - 219 to 220 MHz data
only? (Jim Jerzycke)
8. Re: Opinion regarding satellite radios (Edward Cole)
----------------------------------------------------------------------
Message: 1
Date: Sat, 15 Mar 2008 08:26:58 -0600
From: "Auke de Jong, VE6PWN" <sparkycivic(AT)shaw.ca>
Subject: [amsat-bb] Lo-19 beacon
To: AMSAT-BB <amsat-bb(AT)amsat.org>
Message-ID: <001701c886a8$a0913e00$6400a8c0(AT)sparkys>
Content-Type: text/plain; charset="iso-8859-1"
I was listening to the inspiring beacon from LO-19, "lusathihi", and noticed
something on my screen in speclab: The carrier seems to continue faintly,
after the transmission is over. During the 20 second pause between telemetry
frames, I can see the carrier continue but very faintly, all the way through
to the start of the next frame. I can only see this when the bird is right in
my beam, as I can't adjust my elevation, and only have a small yagi/preamp, so
that the transmissions are at least S-7, then the carrier is just visible on
my display.
Can someone explain how this is possible? Shouldn't the transmitter be off
ehen it's not keyed?
Thanks,
Auke
Auke de Jong
VE6PWN
DO33go
Edmonton, AB
------------------------------
Message: 2
Date: Sat, 15 Mar 2008 09:03:59 -0600
From: James Duffey <JamesDuffey(AT)comcast.net>
Subject: [amsat-bb] 220 MHz Radios and Region 2 Hams
To: G8IFF/KC8NHF <nigel(AT)ngunn.net>
Cc: AMSAT <amsat-bb(AT)amsat.org>
Message-ID: <A6D0E937-5F76-4C4E-8E0D-919630E1A062(AT)comcast.net>
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
Nigel - ITU Region 2 includes all of what geographers call the western
hemishpere, including South America. As you surmise, the US has about
3/4 of the hams in Region 2. Region 2 has about a third of the World's
hams.
I suspect that several thousand 220 MHz multimode rigs could be sold,
enough to recoup development costs and have a bit left over for
profit. If an existing platform were used as a basis for the rig, or
220 MHz incorporated into other VHF/UHF multimode rigs development
costs would be low.
US Ham gear manufacturers Elecraft and DEMI both make 222MHz
transverters and in Elecraft's case they integrate nicely with the K2
to provide what nearly transparent operation controlled by the K2.
They still are separate boxes though.
The US manufacturers are victims of the return on investment paradigm
embraced by many modern companies. They have limited resources and
those resources are used to address the big markets, high performance
do everything HF transceivers and smart HF linears. The development
funds never make it down to the demand for secondary ham markets like
VHF/UHF multi mode rigs, nor to tertiary or niche markets like 220 MHz.
The trend towards putting lots of functions into firmware that can be
revised also drains resources away from development resources for the
secondary markets. The Ten-Tec 6N2, a nice duo band rig, was dropped
by Ten-Tec when resources were diverted to support the Orion, even
though the 6N2 was well thought of by hams and sold reasonably well.
With this happening to a reasonably popular rig, imagine the
difficulty in getting development of a 220 MHz rig started. The 6N2
was leveraged from the Argonaut.
The 222 MHz band suffers in the USA from an uncertain future and has
for the last 25 or 30 years. This uncertainty has limited interest in
the band, both by potential users and by potential manufacturers. It
enjoyed a brief stint of popularity in the late 70s as a refuge from
the crowded 144 MHz band during the FM explosion of the 70s. A number
of companies dipped their toe into the 1.25 M waters including
Vibroplex and Sears Roebuck. Then UPS made a proposal to the FCC to
take the band for a communication, location, and tracking service.
This pretty much stopped any manufacturer interest in producing 220
MHz equipment. And that slowed interest in the band by hams. The FCC
finally gave UPS the bottom 2 MHz of the band and they promptly
abandoned any plan for it. People are atill unusre of what the future
holds for the band.
Not all Americans that reside in the USA are the jingoistic egotists
you imagine. Most are not. The current low exchange rate has made that
painfully clear to most of us, as have rising energy costs. We live in
a global economy. In the long run, that benefits everybody. I would
like a 220 MHz multimode rig. I don't care where it comes from. I
realize that most of the World's hams, including you, could care less
about this. I don't have a problem with this. The rise of Japanese
radio manufacturers was a contributing cause of the demise of ham
radio manufacturing in this country. Some of us would like them to
realize that they have most of the ham radio market here and that
providing a rig that provides 220 MHz capabilities for an area in
which they dominate the market is not too much to ask. They could
probably make a buck or two on the deal in the meantime. - Duffey
--
KK6MC
James Duffey
Cedar Crest NM
------------------------------
Message: 3
Date: Sat, 15 Mar 2008 11:24:36 -0400
From: David <m0zlb(AT)btinternet.com>
Subject: [amsat-bb] Pass prediction software requirement
To: AMSAT BB <amsat-bb(AT)amsat.org>
Message-ID: <DADACD74-6410-4576-B606-41000BE30080(AT)btinternet.com>
Content-Type: text/plain; charset=US-ASCII; format=flowed
Can anyone suggest a program that is suitable for a 32gig Apple iTouch?
Thanks in advance
David
KG4ZLB/M0ZLB
Amsat UK
m0zlb(AT)btinternet.com
david.m0zlb(AT)gmail.com
------------------------------
Message: 4
Date: Sat, 15 Mar 2008 15:52:10 +0000
From: G8IFF/KC8NHF <nigel(AT)ngunn.net>
Subject: [amsat-bb] 220 MHz Radios and Region 2 Hams
To: Amsat-Bb <amsat-bb(AT)amsat.org>
Message-ID: <47DBF0AA.9010009(AT)ngunn.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Duffy.
Your e-mail system is broken. It doesn't accept incoming mail so I've
had to reply via the reflector.
Hi Duffey
Most of what you say has basically been observed here.
Britain makes very little these days. The far east does it far more
cheaply and has pushed our manufacturing businesses out of the market.
Those tat do survive tend towards the expensive niche markets.
We've got your 222MHz problem on 70MHz. We've got 500KHz of band that we
share with the military. There is very little, if any, commercial gear
available for that band although several European countries have
recently been given access so the market may open up.
I do actually have reason to be concerned with the future of the
American 220MHz allocation. Come this summer, I will be emigrating from
the UK to the US to spend my retirement in your country. I have a wife
from Dayton OH who wants to go home. I've held a US license since 1999
and am a VE, conducting exams in the UK. I guess the US will be
something of an adventure.
------------------------------
Message: 5
Date: Sat, 15 Mar 2008 11:49:14 -0600
From: Alvaro de Leon Romo <xe2at(AT)hotmail.com>
Subject: [amsat-bb] NZ5N/HR status ??
To: <amsat-bb(AT)amsat.org>
Message-ID: <BAY108-W1064F05272BC9515FF67BCF50B0(AT)phx.gbl>
Content-Type: text/plain; charset="iso-8859-1"
Was Bill NZ5N/HR in the morning this Saturday ????
Which grid is he now ??
GL all
Al XE2AT
_________________________________________________________________
Dos categor?as, incre?bles premios, un ganador. ?Quieres ser t??
http://cine.prodigymsn.com/nanometraje
------------------------------
Message: 6
Date: Sat, 15 Mar 2008 13:58:31 -0400
From: "Tyler Harpster" <tyler881(AT)comcast.net>
Subject: [amsat-bb] Re: 220 MHz Radios and Region 2 Hams - 219 to 220
MHz data only?
To: "James Duffey" <JamesDuffey(AT)comcast.net>, "G8IFF/KC8NHF"
<nigel(AT)ngunn.net>
Cc: AMSAT <amsat-bb(AT)amsat.org>
Message-ID: <002101c886c6$3061edf0$14f23a47(AT)DD9MR751>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
So what is this rumored spectrum from 219 to 220 that I see every once in a
while? I think I saw that it's for data link use only? Does anyone use
that 1 MHz worth of spectrum?
Tyler
KM3G
------------------------------
Message: 7
Date: Sat, 15 Mar 2008 11:27:05 -0700 (PDT)
From: Jim Jerzycke <kq6ea(AT)pacbell.net>
Subject: [amsat-bb] Re: 220 MHz Radios and Region 2 Hams - 219 to 220
MHz data only?
To: Tyler Harpster <tyler881(AT)comcast.net>, James Duffey
<JamesDuffey(AT)comcast.net>, G8IFF/KC8NHF <nigel(AT)ngunn.net>
Cc: AMSAT <amsat-bb(AT)amsat.org>
Message-ID: <522521.75787.qm(AT)web80603.mail.mud.yahoo.com>
Content-Type: text/plain; charset=iso-8859-1
The 220 spectrum management group here in SoCal has it
listed as point-to-point, 100kHz spacing.
http://www.220sma.org/bandplan.htm
73, Jim
--- Tyler Harpster <tyler881(AT)comcast.net> wrote:
> So what is this rumored spectrum from 219 to 220
> that I see every once in a
> while? I think I saw that it's for data link use
> only? Does anyone use
> that 1 MHz worth of spectrum?
>
> Tyler
> KM3G
>
> _______________________________________________
> Sent via AMSAT-BB(AT)amsat.org. Opinions expressed are
> those of the author.
> Not an AMSAT-NA member? Join now to support the
> amateur satellite program!
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>
------------------------------
Message: 8
Date: Sat, 15 Mar 2008 11:51:14 -0800
From: Edward Cole <kl7uw(AT)acsalaska.net>
Subject: [amsat-bb] Re: Opinion regarding satellite radios
To: G8IFF/KC8NHF <nigel(AT)ngunn.net>, Nate Duehr <nate(AT)natetech.com>
Cc: AMSAT <amsat-bb(AT)amsat.org>
Message-ID: <200803151951.m2FJpFRH069451(AT)hermes.acsalaska.net>
Content-Type: text/plain; charset="us-ascii"; format=flowed
Perhaps instead of a plug-in cage, snap on external modules that
would stack on the bottom; use a daisy chain control cable between
each module and individual RF connectors for antenna? That way one
could modify the radio to personal requirements and not have "extra
stuff" hanging on. Basically this is a packaging issue.
At 02:14 AM 3/15/2008, you wrote:
>Nate Duehr wrote:
> >
> > I think what you meant to say is... "only little old ITU Region 2 has
> > that band". Canada, Mexico... etc...
> >
>
>I guess so but I would suspect that the USA has the majority of the
>amateurs in Region 2.
>I suppose my gripe is that too many Americans appear to believe that the
>USA is the centre of the universe and the rest of the world should cater
>for their needs.
>If there really is demand for a VHF/UHF multimode satellite capable
>radio with 220 and 1296 then there are several American manufacturers
>(TenTec, Elecraft for example) perfectly capable of the task. They
>obviously don't see it as a viable product.
>
> > Yeah, yeah... so they can build modules for the bands you guys have
> > that WE don't, too. (GRIN)
> >
>Band modules are a great idea.
>It's a pity more rigs don't come with bays for plug in transverters but
>it leads to a larger chassis that many wouldn't need or be prepared to
>pay for.
>Tektronix have made 'scopes for centuries with plug in modules so it's
>hardly a new idea. The Ft-736 had transverters but it needs to be a
>front panel plug in to allow for easy selection of facilities.
>
>--
><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
>Nigel A. Gunn. 59 Beadlemead, Milton Keynes, MK6 4HF, England.
>Tel +44 (0)1908 604004 mobile +44 (0)7951079089
>e-mail nigel(AT)ngunn.net www http://www.ngunn.net
>Amateur radio stations G8IFF, KC8NHF
>Member of ARRL, GQRP #11396, QRPARCI #11644, SOC #548, Flying Pig #385,
> Dayton ARA #2128, AMSAT-NA LM-1691, MKARS, RAYNET
><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><>
>
>_______________________________________________
>Sent via AMSAT-BB(AT)amsat.org. 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
*****************************************************
73, Ed - KL7UW BP40iq, 6m - 3cm
144-EME: FT-847, mgf-1801, 4x-xp20, 185w
http://www.kl7uw.com AK VHF-Up Group
NA Rep. for DUBUS: dubususa(AT)hotmail.com
*****************************************************
------------------------------
_______________________________________________
Sent via amsat-bb(AT)amsat.org. 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 3, Issue 135
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