ERP is not QRP . . . . . . I never saw anything in FCC exams about QRP or ERP but it has been a long time for me since I was last examined . . .
folks are confusing ERP and QRP . . . 5 watts out QRP driving an amp . . . get real . . . it is 5 watts out of the final stage feeding the antenna . . . the gain of the antenna does not have anything to do with QRP it has to do with ERP . . . one is apples and the other is oranges . . . the original issue arose out of someone feeling that folks using the AO 51 QRP channel were not using QRP . . . well I use 5 watts on the QRP channel but I only have fairly big yagis for satellites . . . If the goal is to have HT users with compromised antennas use the "QRP" channel then drop the QRP designation and ask the users to keep the power to 5 watts out from the final stage of the transmitter and then WHAT ? ? ? 5 watts many can compute but that is it . . . ERP is guess work by most . . . that is my point . . . seems senseless to me but surprising the responses . . . ERP is not QRP different concepts . . . apples and oranges . . . .
Jim W9VNE
Is anyone in the know able to explain the _intent_ of "QRP" on AO-51?
TIA and 73, Scott N1AIA
Amen, brother.
Something occurred to me earlier today in thinking about this ongoing discussion that includes a few different threads.
Given all the information I can find about the nominal transmitter powers of the satellites I have worked [AO-7, AO-16, AO-27 (currently inactive), AO-51, FO-29, SO-50 and VO-52], at least half of every satellite contact I've made has been QRP - the half coming this way from space. Most of mine - but not all - have been 2-way QRP.
73, Merry Christmas and Happy New Year to all,
Tim - N3TL
-------------- Original message from "Jim Danehy" [email protected]: --------------
ERP is not QRP . . . . . . I never saw anything in FCC exams about QRP or
ERP but it has been a long time for me since I was last examined . . . folks are confusing ERP and QRP . . . 5 watts out QRP driving an amp . . . get real . . . it is 5 watts out of the final stage feeding the antenna . . . the gain of the antenna does not have anything to do with QRP it has to do with ERP . . . one is apples and the other is oranges . . . the original issue arose out of someone feeling that folks using the AO 51 QRP channel were not using QRP . . . well I use 5 watts on the QRP channel but I only have fairly big yagis for satellites . . . If the goal is to have HT users with compromised antennas use the "QRP" channel then drop the QRP designation and ask the users to keep the power to 5 watts out from the final stage of the transmitter and then WHAT ? ? ? 5 watts many can compute but that is it . . . ERP is guess work by most . . . that is my point . . . seems senseless to me but surprising the responses . . . ERP is not QRP different concepts . . . apples and oranges . . . .
Jim W9VNE _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
Hi
I built an antenna for AO-51 which works well
I just cant seem to find the dimensions on the net
Here is a picture
http://www.tech-software.net/antennae/images/yagi_001.jpg
I want ot scale it and make one for 1090 MHz
Andrew VK4TEC
On Dec 19, 2008, at 6:17 PM, Andrew Rich wrote:
Hi
I built an antenna for AO-51 which works well
I just cant seem to find the dimensions on the net
Here is a picture
http://www.tech-software.net/antennae/images/yagi_001.jpg
I want ot scale it and make one for 1090 MHz
This is the WA5VJB Yagi, a good performer that is cheap and easy to make. Here is a link:
< http://www.wa5vjb.com/yagi-pdf/cheapyagi.pdf >
There are plans for a 902/903 version which should scale nicely to 1090 MHz. Let us know how it works out. - Duffey -- KK6MC James Duffey Cedar Crest NM
Thats the one !
Thank you ----- Original Message ----- From: James Duffey To: Andrew Rich Cc: James Duffey ; [email protected] Sent: Saturday, December 20, 2008 3:03 PM Subject: Re: [amsat-bb] 70 cm YAGI
On Dec 19, 2008, at 6:17 PM, Andrew Rich wrote:
Hi
I built an antenna for AO-51 which works well
I just cant seem to find the dimensions on the net
Here is a picture
http://www.tech-software.net/antennae/images/yagi_001.jpg
I want ot scale it and make one for 1090 MHz
This is the WA5VJB Yagi, a good performer that is cheap and easy to make. Here is a link:
< http://www.wa5vjb.com/yagi-pdf/cheapyagi.pdf >
There are plans for a 902/903 version which should scale nicely to 1090 MHz. Let us know how it works out. - Duffey -- KK6MC James Duffey Cedar Crest NM
------------------------------------------------------------------------------
No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.176 / Virus Database: 270.9.19/1857 - Release Date: 12/19/2008 10:09 AM
Are those spacings between the elements, or form the reference 0 ? ----- Original Message ----- From: James Duffey To: Andrew Rich Cc: James Duffey ; [email protected] Sent: Saturday, December 20, 2008 3:03 PM Subject: Re: [amsat-bb] 70 cm YAGI
On Dec 19, 2008, at 6:17 PM, Andrew Rich wrote:
Hi
I built an antenna for AO-51 which works well
I just cant seem to find the dimensions on the net
Here is a picture
http://www.tech-software.net/antennae/images/yagi_001.jpg
I want ot scale it and make one for 1090 MHz
This is the WA5VJB Yagi, a good performer that is cheap and easy to make. Here is a link:
< http://www.wa5vjb.com/yagi-pdf/cheapyagi.pdf >
There are plans for a 902/903 version which should scale nicely to 1090 MHz. Let us know how it works out. - Duffey -- KK6MC James Duffey Cedar Crest NM
------------------------------------------------------------------------------
No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.176 / Virus Database: 270.9.19/1857 - Release Date: 12/19/2008 10:09 AM
element spacings are normally cumulative and start at the reflector.
Andrew Rich wrote:
Are those spacings between the elements, or form the reference 0 ?
Those are cumulative spacings from 0, the reflector. - Duffey On Dec 19, 2008, at 11:09 PM, Andrew Rich wrote:
Are those spacings between the elements, or form the reference 0 ? ----- Original Message ----- From: James Duffey To: Andrew Rich Cc: James Duffey ; [email protected] Sent: Saturday, December 20, 2008 3:03 PM Subject: Re: [amsat-bb] 70 cm YAGI
On Dec 19, 2008, at 6:17 PM, Andrew Rich wrote:
Hi
I built an antenna for AO-51 which works well
I just cant seem to find the dimensions on the net
Here is a picture
http://www.tech-software.net/antennae/images/yagi_001.jpg
I want ot scale it and make one for 1090 MHz
This is the WA5VJB Yagi, a good performer that is cheap and easy to make. Here is a link:
< http://www.wa5vjb.com/yagi-pdf/cheapyagi.pdf >
There are plans for a 902/903 version which should scale nicely to 1090 MHz. Let us know how it works out. - Duffey -- KK6MC James Duffey Cedar Crest NM
No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.176 / Virus Database: 270.9.19/1857 - Release Date: 12/19/2008 10:09 AM
-- KK6MC James Duffey Cedar Crest NM
participants (6)
-
Andrew Rich -
James Duffey -
Jim Danehy -
n3tl＠bellsouth.net -
Nigel Gunn G8IFF/W8IFF -
Scott Richardson