[OZAPRS] Need a hand

[Andrew Rich]

Both a bonnet mount and maggy mount in center of roof

Diamond 30 meter vertical

Radio is only connected via cigarette lighter

Getting 6:1 and 9:1

Vna dips but vswr is 6:1 

Might try my vhf whip on vna

Not sure car and antenna base are grounded

Like something is floating

I need to measure ohms to chassis

Rg58 only 4 Meters

Radio ground only by power lead

Vna is floating

Not tried any ground straps yet

A


Sent from my iPhon

> On 3 Dec 2017, at 5:56 pm, Glen English VK1XX <glenlist at pacificmedia.com.au> wrote:
> 
> hi Andrew
> 
> Please do ya best to answer the following barrage of questions and I may be able to assist :
> 
> but all questions need to be answered to solve the crossword...
> 
> 1) what is the whip.
> 
> 2) where is it located, precisely
> 
> 3) does the ground on the base of the whi[ measure 0 ohms to the chassis ?
> 
> 4) how long RG58 lead in ?
> 
> 5) Is the radio grounded via a local ground short strap/thick wire to earth bolt or only its negative power lead ?
> 
> 6) does it dip below 2:1 VSWR anywhere when you sweep it with a VNA ?
> 
> 7) With the VNA, is the VNA grounded, or floating on the end of the  coax?
> 
> 8) With the VNA, if floating, does the VNA indicated sweep/match change if you ground the outer of the VNA coax connector to a local ground like ground bolt ona  door hinge etc
> 
> 
> 
> 
>> On 3/12/2017 6:42 PM, Andrew Rich wrote:
>> I bought a 30 m whip for the car
>> 
>> Can’t get better than vswr 6:1
>> 
>> I was told I need to ground the base
>> 
>> Also cigarette lighter maybe not enough current ?
>> 
>> 10.147 MHz
>> 
>> Andrew
>> 
>> Sent from my iPhone
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> 
> 
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