[amsat-bb] Re: VHF UHF Rig

[Andrew Harris]

Hi Bob,

   Thanks for the info.  I actually own a Kenwood TH-D7.  Is that what
you're referring to?  I was under the impression that the TNC on the
TH-D7 is permanently crippled and I couldn't use it to effectively
communicate in both directions to a pacsat.

-andrew

On Fri, Jul 25, 2008 at 5:55 PM, Robert Bruninga <bruninga at usna.edu> wrote:
>> Is there a radio that is small and lightweight
>> that I could interface to a computer easily to
>> receive and transmit packets to AO-51?
>> I want to use the radio (and the AO-51 pacsat)
>> as the primary means to communicate with an
>> ocean-deployed robot.
>
> Use any of the APRS radios (D7, D70, D710).  They all have 9600
> baud TNC's built in... Operate in UI digipeat mode assuming your
> command/telemetry is sparse and infrequent and not high volume..
>
> Bob, WB4APR
>
>  Obviously my hand would not
>> be there to correct for doppler, etc.
>>
>> -andrew
>>
>> On Fri, Jul 25, 2008 at 12:55 PM, i8cvs
> <domenico.i8cvs at tin.it> wrote:
>> > Hi All,
>> >
>> > My Kenwood TS-790E has absolutely no "birdies" in 2 m ,70
>> cm and 23 cm
>> > and this is why I like it very much.
>> >
>> > Tanks very much the OM that sold it to me as used to buy a
>> new TS-2000X
>> > and his "birdies" !
>> >
>> > 73" de
>> >
>> > i8CVS Domenico
>> >
>> > ----- Original Message -----
>> > From: "John Price" <n4qwf1 at gmail.com>
>> > To: "Andrew Glasbrenner" <glasbrenner at mindspring.com>;
>> <amsat-bb at amsat.org>
>> > Sent: Friday, July 25, 2008 4:54 PM
>> > Subject: [amsat-bb] Re: VHF UHF Rig
>> >
>> >
>> >> My 847 has a number of birdies in the satellite band. I use
> a magic
>> >> notch to silence them. It is
>> >> not the perfect solution but it works.
>> >>
>> >> 73's << John
>> >>
>> >> On Fri, Jul 25, 2008 at 10:32 AM, Andrew Glasbrenner
>> >> <glasbrenner at mindspring.com> wrote:
>> >> > The TS2000 generates an internal signal (a "birdie") on
>> the downlink of
>> >> > SO-50 and AO-27. This signal overwhelms the satellite
>> signal in most
>> > cases,
>> >> > making it difficult if no impossible to use on those two
>> very popular
>> >> > satellites.
>> >> >
>> >> > 73, Drew KO4MA
>> >> >
>> >> > ----- Original Message -----
>> >> > From: "Terry Dillard" <tdillard at gmail.com>
>> >> > To: <AMSAT-BB at amsat.org>
>> >> > Sent: Friday, July 25, 2008 9:55 AM
>> >> > Subject: [amsat-bb] Re: VHF UHF Rig
>> >> >
>> >> >
>> >> >> Pardon my ignorance, but what the heck is a "birdy
> problem"?
>> >> >>
>> >> >> --
>> >> >> Terry Dillard, KI4YZI
>> >> >> www.ki4yzi.com
>> >> >> "Veritas Vos Liberabit"
>> >> >>
>> >> >>
>> >> >> On 7/24/08, Sebastian <w4as at bellsouth.net> wrote:
>> >> >>>
>> >> >>> Oh boy, and here I just bought a used dual band mobile
>> on the cheap
>> >> >>> (no transmit) to take care of the birdy problem.
>> >> >>>
>> >> >>> Do you have any idea why the birdy would show up on a
> different
>> >> >>> radio?  Could it be a matter of a lack of shielding?
>> It just doesn't
>> >> >>> make any sense to me why a different rig would get
>> that interference
>> >> >>> on receive, and even when using a different antenna.
>> >> >>>
>> >> >>> Others have suggested using a preamp on 440, and
>> turning off the
>> >> >>> 2000's internal preamp and lowering the rf gain,
>> therefore using the
>> >> >>> preamp to get rid of most of the birdy.
>> >> >>>
>> >> >>> But I guess I'll find out for sure when my other rig
> gets here.
>> >> >>>
>> >> >>> 73 de W4AS
>> >> >>> Sebastian
>> >> >>>
>> >> >>> On Jul 24, 2008, at 7:00 PM, Bruce Robertson wrote:
>> >> >>>
>> >> >>> > On Wed, Jul 23, 2008 at 11:31 PM, Mike Miller
>> <mmiller at nctc.com>
>> >> >>> > wrote:
>> >> >>> >> Thinking about selling 847.....Which rig is best for
>> >> >>> >> satellite..work.?
>> >> >>> >>
>> >> >>> >> ICOM 910 H
>> >> >>> >> Kenwood 2000
>> >> >>> >>
>> >> >>> >> opinions ....your 2 cents
>> >> >>> >
>> >> >>> > I own a TS-2000. The birdie problem on SO-50 and
>> AO-27 is quite
>> > real,
>> >> >>> > and there is no fix I know of. I find that the
>> birdie is so bad that
>> >> >>> > even if I use a different receiver on UHF, I pick up
>> the birdie on
>> > it
>> >> >>> > as well! So it is a worse radio regarding satellite
>> work than the
>> > ICOM
>> >> >>> > if you care to work these birds.  However, if you
>> consider the fact
>> >> >>> > that a fine HF radio is thrown in at no extra cost,
>> that there is
>> >> >>> > continuously adjustable filtering also at no cost,
>> you might prefer
>> >> >>> > that trade-off. I'm reasonably pleased with mine.
>> >> >>> >
>> >> >>> > However, if money were no issue, I would get the
>> ICOM for satellite
>> >> >>> > work and a different HF radio with even better
>> characteristics.
>> >> >>> >
>> >> >>> > HTH,
>> >> >>> >
>> >> >>> > 73, Bruce
>> >> >>> > VE9QRP
>> >> >>>
>> >> >> _______________________________________________
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> those of the
>> > author.
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>> >> > _______________________________________________
>> >> > Sent via AMSAT-BB at amsat.org. Opinions expressed are
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>> >>
>> >>
>> >>
>> >> --
>> >> N4QWF Amateur Radio Operator
>> >> AO-7,AO-27,SO-50,AO-51,VO-52,ISS
>> >> Internet N4QWF at AMSAT.ORG
>> >> Echolink nodes #110903 -L #388463
>> >> Formerly KC4AHW VK3FEZ
>> >> Amsat Member #27845
>> >> DXCC #33,478
>> >> VUCC SAT #135
>> >> WAS SAT #296
>> >> 51 on AO-51 #13
>> >> LON -79.256 LAT 37.459 Grid FM07il
>> >> >From the Foothills of the Blueridge
>> >>
>> >> *Life should not be a journey to the grave with the
> intention of
>> >> arriving safely in a pretty and well preserved body, but
> rather to
>> >> skid in broadside, thoroughly used up, totally worn out,
> and loudly
>> >> proclaiming - "WOW, What a ride!"
>> >> _______________________________________________
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>> of the author.
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>> >
>> >
>> > _______________________________________________
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>> _______________________________________________
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