[amsat-bb] Fox, "Easy Sats"....et al....
Joe
nss at mwt.net
Sat Jul 4 18:38:39 UTC 2015
I have a 12 foot tape here that when coiled up is less than a inch in
diameter MAX,
Joe WB9SBD
Sig
The Original Rolling Ball Clock
Idle Tyme
Idle-Tyme.com
http://www.idle-tyme.com
On 7/4/2015 1:31 PM, Paul Stoetzer wrote:
> A 10m dipole is almost 17 feet long. You could fit it in a cubesat,
> but where are the batteries, transmitter, receiver, IHU, etc going to go?
>
> NO-83 and NO-84 have 10m uplinks that use a 72' wire antenna for
> reception. That depends on the ground station to supply a bit more
> uplink power. With a cubesat, you don't have adequate power to
> overcome a poor downlink antenna.
>
> 73,
>
> Paul, N8HM
>
> On Sat, Jul 4, 2015 at 2:22 PM, Joe <nss at mwt.net <mailto:nss at mwt.net>>
> wrote:
>
> tape measure dipole worked in the past.
> Joe WB9SBD
>
> The Original Rolling Ball Clock
> Idle Tyme
> Idle-Tyme.com
> http://www.idle-tyme.com
> On 7/4/2015 1:10 PM, Paul Stoetzer wrote:
>> Because of the difficulty of putting an adequate antenna for a
>> 10m downlink on a cubesat.
>>
>> 73.
>>
>> Paul, N8HM
>>
>> On Sat, Jul 4, 2015 at 2:07 PM, Joe <nss at mwt.net
>> <mailto:nss at mwt.net>> wrote:
>>
>> Why don't they have mode "A" anymore? even the single channel
>> FM could be mode a true?
>>
>> The Original Rolling Ball Clock
>> Idle Tyme
>> Idle-Tyme.com
>> http://www.idle-tyme.com
>> On 7/4/2015 12:48 PM, Paul Stoetzer wrote:
>>> Well, you are partially right. With OSCAR 6 and 7 and their strong ten
>>> meter downlinks, it was just a matter of adding two meter transmit
>>> capability to an HF station. Now it does take a little more work to
>>> receive and transmit at VHF and UHF with SSB or CW and the prevalence
>>> of man-made noise on VHF and UHF these days generally requires a beam.
>>>
>>> I am quite certain that many of the people that worked OSCARs, 6, 7,
>>> 8, and the RS birds never graduated from Mode A. Just like many of the
>>> FM satellite users never graduate from FM.
>>>
>>> People tend to think it's more difficult than it is. I've made over
>>> 2,000 linear transponder contacts with nothing more than two Yaesu
>>> FT-817s (for a few hundred of those I used an Icom IC-R10 receiver)
>>> and an Arrow antenna handheld.
>>>
>>> The radios for operating via a linear transponder are widely available
>>> and inexpensive. A Yaesu FT-100, FT-817, FT-857, FT-897, FT-991 or an
>>> Icom IC-706MkII(g), Icom IC-7000, or any of those plus a FUNcube
>>> dongle and computer to receive the downlink are all the radio you need
>>> and an Arrow or Elk antenna will get you going.
>>>
>>> 73,
>>>
>>> Paul, N8HM
>>>
>>>
>>> On Sat, Jul 4, 2015 at 1:19 PM, Joe<nss at mwt.net> <mailto:nss at mwt.net> wrote:
>>>> Funny how a linear bird is a technical challenge, wow, as a novice in 1975 I
>>>> listened to Oscar 6 & 7 all the time. and once up graded used them also all
>>>> the time. Sad to think that 1970's technology is high tech to anyone.
>>>> Joe WB9SBD
>>>> Sig
>>>> The Original Rolling Ball Clock
>>>> Idle Tyme
>>>> Idle-Tyme.com
>>>> http://www.idle-tyme.com
>>>>
>>>> On 7/4/2015 12:10 PM, Paul Stoetzer wrote:
>>>>> Michael,
>>>>>
>>>>> The idea is to get people hooked on satellite operating and then have
>>>>> them "graduate" to more challenging aspects of satellite operating.
>>>>>
>>>>> AMSAT is, of course, working on projects that be more of a technical
>>>>> challenge than FM satellites, like Fox-1E with a linear transponder
>>>>> and the geosynchronous P4B project.
>>>>>
>>>>> 73,
>>>>>
>>>>> Paul, N8HM
>>>>>
>>>>> On Sat, Jul 4, 2015 at 1:02 PM, Michael<Mat_62 at charter.net> <mailto:Mat_62 at charter.net> wrote:
>>>>>> Once again I feel the need to say that we have gone in the wrong
>>>>>> direction
>>>>>> by trying to convince everyone how easy a "sat" is to work with a
>>>>>> handheld
>>>>>> antenna. I got into satellite communication because of the technical
>>>>>> challenge involved, not by how "easy it was".
>>>>>> This whole half or full duplex issue is a symptom of "dumbing down"
>>>>>> There
>>>>>> should never be any question on it. Full duplex should ALWAYS be used.
>>>>>> 73,
>>>>>> Michael, W4HIJ
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