[TowerTalk] 160m Slopers

[Roger (K8RI) on TT]

160 half sloper (quarter wave) on 100' tower with TH-5. 7L C3i 6-meter 
yagi. 2 11L 440 C3i and 2 12L 144 C3i antennas on top. excellent match 
connected to center conductor of coax. Shield grounded to tower at feed 
point.  BW @ 2:1 SWR < 50 KHz..  With ant resonant near 1.875 and tuner 
I could work the whole band. Antenna resonant neat the bottom of the 
band, I could only operate the bottom half of the band at 1.5KW.  Higher 
and a 5 KW tuner would arc.

73 Roger (K8RI)



On 1/31/2017 9:42 AM, Chuck Dietz wrote:
> Follow up on feeding two slopers with one feedline.  It did NOT work.
> Impedence way off (probably because they were close to the same length). I
> cut one off and the other one worked great. I didn't even need to adjust
> the length! Getting about 100 kHz bandwidth with the top at about 130' on a
> 150' tower.
>
> Chuck W5PR
>
> On Wed, Jan 25, 2017 at 6:42 PM, Chuck Dietz <w5prchuck at gmail.com> wrote:
>
>> I have a 140' tower with several beams on it and I want to get back on
>> 160m.  I want to put up a 1/4 WL sloper, but my experience has been that it
>> will only barely cover 1/2 the band.  I have measured out two slopers, one
>> 133' long and the other 127' long. Can I feed both together with the same
>> feedline? (Adjusting the longer one first.)  Or, should I just "bite the
>> bullet" and make two slopers to the antenna switch? I only have 4 ports on
>> the switch so I want to only use one for this if its not going to be a
>> compromise.
>>
>> Thanks!
>>
>> Chuck W5PR
>>
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-- 

73

Roger (K8RI)


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