[TowerTalk] Temporary Coax on the ground

[Roger (K8RI) on TT]

Er...MATCHING network!

73

Roger (K8RI)


On 1/28/2016 Thursday 9:01 PM, Roger (K8RI) on TT wrote:
> Try a choke in the coax just before the batching network. Use Jim 
> Brown's (K9YC) RFI tutorial for the specifications.  To me, it sounds 
> like feed line pick up.
>
> 73
>
> Roger (K8RI)
>
>
> On 1/28/2016 Thursday 4:13 PM, dw wrote:
>> I have two wire antennas.
>> One is a classic 135' doublet up 55' favoring E/W
>> The other is a 40m dipole I put up last fall which is slightly
>> North-West facing.. for working JA(s) on grey-line.
>> Since the 40m Dipole was a "throw-up" I simply left the 100 feet of
>> RG-213 lying on the ground going to it.
>> Both wire antenna are fed with external L-Networks and ladder-line.
>> I've noticed the doublet is much quieter on 40 than the dipole.
>> And I don't know why.
>> Could be the dipole has that 100 feet of coax laying on the surface of
>> the ground picking up noise.
>> while most of the 30 feet of coax feeding the doublet is under ground.
>> Could be simply the difference in 30' vs 100' of coax.
>
>


-- 

73

Roger (K8RI)


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