[TowerTalk] 80 Meter beam

[Edward Mccann]

Jim:
What is spacing between your two wire elements?
Ed McCann
AG6CX

Sent from my iPhone

> On Mar 31, 2017, at 10:00 AM, Jim Brown <jim at audiosystemsgroup.com> wrote:
> 
>> On Fri,3/31/2017 5:00 AM, Martin Pelt wrote:
>> I am putting a 80 meter 2 element inverted vee beam up. It will be at 120
>> feet with 39 foot boom.
>> 
>> I have 2 questions dealing with switching from phone to cw without lowering
>> elements and using jumpers.
> 
> I have a 2-element flat Yagi for 80/75 at 140 ft. It consists of two wure dipoles strung between trees, fed with low loss RG11. I retune the antenna from CW to SSB by switching in sections of line in the shack on the dipole that is the reflector. My design is based on a 2-part NCJ piece by W6AM, who rigged two wires, fed them with a half wave of open wire line or twin lead, and switched in L or C in a tuning enclosure at ground level. In my implementation, the L and C are provided by those lengths of coax acting as open and shorted stubs.
> 
> I strongly agree with the advice by others that you MUST model whatever you plan to do.
> 
> 73, Jim K9YC
> 
> _______________________________________________
> 
> 
> 
> _______________________________________________
> TowerTalk mailing list
> TowerTalk at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk