[amsat-bb] Link budgets for upcoming HEO/GEO sats
n1jez at burlingtontelecom.net
Mon Apr 11 12:41:30 UTC 2016
Quick correction, the devices are 'combined' not push/pull. They use a
That's what I get for posting before i had my morning coffee....
"A closed mouth gathers no feet"
On 2016-04-11 06:00, Mike Seguin wrote:
> This has been tested already. A fellow ham has done it and shared
> findings with me. The 600 mW drive is with a pad still inline on the
> input. If you bypass it, drive drops to 10-12 dBm range.
> The devices used are from Skyworks. SE5004L. There are two in
> We have been discussing this amp on the phase4ground list for use as a
> test bed.
> Ed, this would make a very nice amp for portable 5760 use.
> On 4/10/2016 5:43 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
>> from one. ERA-5 was common mmic used for this level. Getting 600mw
>> 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
>> 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
>> 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
>> 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
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