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byoungplumbing(at)gmail.c
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 Posted: Sat Nov 07, 2015 8:48 am Post subject: voodoo antenna magic |
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quarter wave antenna systems has developed a little better than voodoo magic. I will admit there are some antenna designs that defy logic, but quarter wave systems are pretty much a science.
the ignition and alternator noise is generally introduced into the mix through the power to the radio.
on a antenna with poor shielding the received signal can be compromised...but on tx. the signal to noise ratio. (at least the noise getting into the antenna and coax) is minimal.
but the noise getting into the radio power system, and the radio directly gets amplified by the radio and becomes part of the signal amplified by the radio.
double or 100 % shielded coax and an antenna father from the source of noise should clean up the received signal, keeping the noise from getting into and amplified by the radio is the best way to clean up the transmitted signal.
Boyd Young
amateur extra N7WFM
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Kirkds
Joined: 07 Apr 2009
Posts: 52
Location: Michigan
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| Posted: Sat Nov 07, 2015 9:08 am Post subject: voodoo antenna magic |
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Yep....WB8ZMY
From: B Young (byoungplumbing(at)gmail.com)
Sent: Saturday, November 7, 2015 11:47 AM
To: Charlie England (ceengland7(at)gmail.com) ; kolb-list(at)matronics.com (kolb-list(at)matronics.com)
Subject: voodoo antenna magic
quarter wave antenna systems has developed a little better than voodoo magic. I will admit there are some antenna designs that defy logic, but quarter wave systems are pretty much a science.
the ignition and alternator noise is generally introduced into the mix through the power to the radio.
on a antenna with poor shielding the received signal can be compromised...but on tx. the signal to noise ratio. (at least the noise getting into the antenna and coax) is minimal.
but the noise getting into the radio power system, and the radio directly gets amplified by the radio and becomes part of the signal amplified by the radio.
double or 100 % shielded coax and an antenna father from the source of noise should clean up the received signal, keeping the noise from getting into and amplified by the radio is the best way to clean up the transmitted signal.
Boyd Young
amateur extra N7WFM
| | - The Matronics Kolb-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Kolb-List |
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_________________
Kirk Smith
Columbiaville, MI
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