Re: [amsat-bb] Link budgets for upcoming HEO/GEO sats
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 [email protected] To: [email protected] Cc: AMSAT BB [email protected] 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.
http://www.aliexpress.com/item/Free-Shipping-Power-Microwave-TXPA58002W5-5-8...
He has a few pictures showing him taking power measurements himself, making 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 heat).
John
73, Ed - KL7UW http://www.kl7uw.com "Kits made by KL7UW" Dubus Mag business: [email protected]
Hello all,
Has anyone considered this? It is a bit more expensive, but it looks like it will deliver 4W (36dBm) with 100mW (20dBm) input. http://www.ebay.com/itm/SUNHANS-5-8GHz-4000mW-36dBm-Router-WiFi-Signal-Boost...
73 Jim Barbre KB7YSY
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 [email protected] To: [email protected] Cc: AMSAT BB [email protected] 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.
http://www.aliexpress.com/item/Free-Shipping-Power-Microwave-TXPA58002W5-5-8...
He has a few pictures showing him taking power measurements himself, making 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 heat).
John
73, Ed - KL7UW http://www.kl7uw.com "Kits made by KL7UW" Dubus Mag business: [email protected]
Sent via [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
Everyone,
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 push/pull.
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.
Mike
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 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 [email protected] To: [email protected] Cc: AMSAT BB [email protected] 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.
http://www.aliexpress.com/item/Free-Shipping-Power-Microwave-TXPA58002W5-5-8...
He has a few pictures showing him taking power measurements himself, making 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 heat).
John
73, Ed - KL7UW http://www.kl7uw.com "Kits made by KL7UW" Dubus Mag business: [email protected]
Sent via [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
Quick correction, the devices are 'combined' not push/pull. They use a Wilkinson.
That's what I get for posting before i had my morning coffee....
--- 73, Mike, N1JEZ "A closed mouth gathers no feet"
On 2016-04-11 06:00, Mike Seguin wrote:
Everyone,
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 push/pull.
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.
Mike
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 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 [email protected] To: [email protected] Cc: AMSAT BB [email protected] 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.
http://www.aliexpress.com/item/Free-Shipping-Power-Microwave-TXPA58002W5-5-8...
He has a few pictures showing him taking power measurements himself, making 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 heat).
John
73, Ed - KL7UW http://www.kl7uw.com "Kits made by KL7UW" Dubus Mag business: [email protected]
Sent via [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
participants (3)
-
Edward R Cole -
Jim Barbre -
Mike Seguin