[TowerTalk] Shunt Feed vs. Inv. L vs. Inv. V on 160-m

Roger (K8RI) on TT K8RI-on-TowerTalk at tm.net
Tue Dec 3 14:11:31 EST 2013


On 12/3/2013 1:50 PM, Jim Brown wrote:
> On 12/3/2013 10:37 AM, Roger (K8RI) on TT wrote:
>> ry narrow band and IIRC the impedance is about 25 ohms. I've used the 
>> Palstar AT5K tuner in the shack successfully with the legal limit and 
>> no RF in the shack. Although probably not the best arrangement it's 
>> convenient. 
>
> It's probably better than you think.  Loss in decent coax is minimal 
> at 2 MHz unless it's a VERY long line, even with 4:1 SWR off 
> resonance.  Matched loss about 0.25 dB/100 ft for #10 copper center 
> and equivalent robust copper braid.

All feed lines are LMR-600

73

Roger (K8RI)
>
> 73, Jim K9YC
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