[amsat-bb] Link budgets for upcoming HEO/GEO sats
jbarbre at xmission.com
Sun Apr 10 23:30:46 UTC 2016
Has anyone considered this? It is a bit more expensive, but it
looks like it will deliver 4W (36dBm) with 100mW (20dBm) input.
On 4/10/2016 2:43 PM, Edward R Cole wrote:
> John, etal:
> Hope someone tests this and gives a report. Cost is quite reasonable
> for this kind of power at 5-GHz. Note that the DEMI 5670-144
> transverter output is +16 dBm (200mw) so one could obtain 2w with
> drive from one. ERA-5 was common mmic used for this level. Getting
> 600mw is a bit harder.
> Most of these run class-A so do dissipate a lot of heat; most of the
> power becomes heat and not RF. 10-dB RF gain is respectable at microwave.
> Comment on az-el suitable for 1m dishes at 5 and 10-GHz. The Yaesu
> satellite rotators do not resolve pointing angle less than 7-1/2
> degree so probably not adequate. There are some inexpensive telescope
> drives that might work at reasonable prices.
> 73, Ed - KL7UW
> Date: Sun, 10 Apr 2016 13:24:40 -0500
> From: John Toscano <tosca005 at umn.edu>
> To: n1jez at burlingtontelecom.net
> Cc: AMSAT BB <amsat-bb at amsat.org>
> Subject: Re: [amsat-bb] Link budgets for upcoming HEO/GEO sats
> Looking forward to testing mine too. I found another web site that claims
> that 600mW of input drive would give nearly 5W of output.
> He has a few pictures showing him taking power measurements himself,
> this a bit more believable. Would have to watch the heat dissipation
> closely, since they quote 20 watts of supply power (so 15 or more
> watts of
> 73, Ed - KL7UW
> "Kits made by KL7UW"
> Dubus Mag business:
> dubususa at gmail.com
> Sent via AMSAT-BB at amsat.org. 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
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
More information about the AMSAT-BB