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 <[email protected] mailto:[email protected]> 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 <[email protected]
<mailto:[email protected]>> 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<[email protected]>  <mailto:[email protected]>  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<[email protected]>  <mailto:[email protected]>  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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    _______________________________________________
    Sent [email protected]  <mailto:[email protected]>. AMSAT-NA makes this open forum available
    to all interested persons worldwide without requiring membership. Opinions
    expressed
    are solely those of the author, and do not reflect the official views of
    AMSAT-NA.
    Not an AMSAT-NA member? Join now to support the amateur satellite program!
    Subscription settings:http://www.amsat.org/mailman/listinfo/amsat-bb

    _______________________________________________
    Sent [email protected]  <mailto:[email protected]>. AMSAT-NA makes this open forum available
    to all interested persons worldwide without requiring membership. Opinions
    expressed
    are solely those of the author, and do not reflect the official views of
    AMSAT-NA.
    Not an AMSAT-NA member? Join now to support the amateur satellite program!
    Subscription settings:http://www.amsat.org/mailman/listinfo/amsat-bb