[OZAPRS] 10.147 MHz antenna

Andrew Rich vk4tec at tech-software.net
Sun Dec 10 18:04:27 AEDT 2017


I am now considering making a vhf 4G hybrid instead 

Sent from my iPhone

> On 10 Dec 2017, at 4:59 pm, Andrew Rich <vk4tec at tech-software.net> wrote:
> 
> So I drove around all afternoon and heard nothing on 10.147.600 MHz 
> 
> Sent from my iPhone
> 
>> On 10 Dec 2017, at 4:47 pm, Glen English VK1XX <glenlist at pacificmedia.com.au> wrote:
>> 
>> Hi Peter
>> 
>> Good numbers !
>> 
>> was the feedpoint short-open-load compensated, or is this measured down some coax, if so , how long approx ?
>> 
>> 
>>> On 10/12/2017 4:05 PM, Peter Dodd wrote:
>>> Hi Andrew,
>>> 1.34:1 at 10.147 MHz
>>> R= 57 Ohms
>>> X=13.7 Ohms
>>> Dip in X is a bit higher in frequency but can't shorten antenna without cutting.
>>> A bit more work on earthing connections required
>>> Peter
>>> 
>>>   ----- Original Message -----
>>>   *From:* Andrew Rich <mailto:vk4tec at tech-software.net>
>>>   *To:* Australian APRS Users <mailto:ozaprs at aprs.net.au>
>>>   *Sent:* Saturday, December 09, 2017 9:49 AM
>>>   *Subject:* Re: [OZAPRS] 10.147 MHz antenna
>>> 
>>>   Is your antenna grounded
>>> 
>>>   Have you done vswr sweeps
>>> 
>>>   Sent from my iPhone
>>> 
>>>   On 9 Dec 2017, at 8:21 am, Peter Dodd <dodd.pc at bigpond.com
>>>   <mailto:dodd.pc at bigpond.com>> wrote:
>>> 
>>>>   Hi,
>>>>   Diamond HF30FX mounted on Rhino Rack on canopy of my DMax.
>>>>   With 30W tx heard by VK2ZZM and and VK2OL-5 this morning at about
>>>>   900 km
>>>>   Ignore mycall report that is my rx and multipsk software.
>>>>   $65000 and counting for mobile antenna mount
>>>>   Regards
>>>>   Peter VK7KPC-15
>>>> 
>>>>       ----- Original Message -----
>>>>       *From:* vk4tec at tech-software.net
>>>>       <mailto:vk4tec at tech-software.net>
>>>>       *To:* 'Australian APRS Users' <mailto:ozaprs at aprs.net.au>
>>>>       *Sent:* Friday, December 08, 2017 8:36 PM
>>>>       *Subject:* [OZAPRS] 10.147 MHz antenna
>>>> 
>>>>       Hello
>>>> 
>>>>       I can go up but not out
>>>> 
>>>>       Looking for suggestion for HF vertical for 10 MHz please
>>>> 
>>>>       Andrew
>>>> 
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>>> 
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>> 
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