loft antenna

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loft antenna

Postby gerald » Sun Jul 30, 2017 1:28 am

hi can someone tell me the best scanning antenna to put in the loft. to purchase ...or even better to make to scan from 145=160 mhz...thanks
gerald
 
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Re: loft antenna

Postby Chris P » Sun Jul 30, 2017 6:37 am

A simple dipole cut for the marine band ( vertically polarised ) having an element length of around 50cm for each section will be a reasonable compromise antenna for the bands you are interested in but other possibilities are a bowtie( shown below) or slim jim, both of which can be constructed from readily available materials such as small bore copper tube or wire . I use 2.5 Twin and Earth cable as a source for elements and 20mm white pvc conduit as supports if the antenna is to be mounted outside

Image

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the length of each arm is 40CM ( I bend an 80cm length in half to form each V shaped piece )and the distance across the open end is 34CM the centre of the antenna can be a so239 socket as shown or a piece of choc block

Image
Regards Chris aka G8FFF nipper or tazmin88
Chris P
 
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Location: 6.5nM west of 06 threshold marham

Re: loft antenna

Postby Chris P » Sun Jul 30, 2017 6:55 am

simple dipole is shown below that can be mounted externally

Image
Regards Chris aka G8FFF nipper or tazmin88
Chris P
 
Posts: 363
Joined: Sun Nov 02, 2014 12:20 pm
Location: 6.5nM west of 06 threshold marham

Re: loft antenna

Postby gerald » Sun Jul 30, 2017 2:40 pm

ok thanks for that Chris P ... lets get the tool box out.
gerald
 
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Joined: Sat Feb 18, 2017 2:45 am


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