blog:2021-03-08:cq_dx_2021
Differences
This shows you the differences between two versions of the page.
Both sides previous revisionPrevious revision | |||
blog:2021-03-08:cq_dx_2021 [2021/03/08 17:34] – ve7tbn | blog:2021-03-08:cq_dx_2021 [2021/03/09 09:01] (current) – ve7tbn | ||
---|---|---|---|
Line 5: | Line 5: | ||
SWR were mostly ~ 1.5 or lower with occasional spikes, reflected power was low. I operated from a deep cycle battery. Though the coax feed line was less than 30' (including amount on choke), assuming there was some common mode current present, a 1:1 toroid type choke might improve antenna system efficiency more than the air wound choke. Choke is about 3' away from feed point. Locating it closer to feed point seemed to hinder performance. | SWR were mostly ~ 1.5 or lower with occasional spikes, reflected power was low. I operated from a deep cycle battery. Though the coax feed line was less than 30' (including amount on choke), assuming there was some common mode current present, a 1:1 toroid type choke might improve antenna system efficiency more than the air wound choke. Choke is about 3' away from feed point. Locating it closer to feed point seemed to hinder performance. | ||
- | Though I used insulated wire, there might be a risk of someone or animal getting RF burn. But, area was at a dead end with lots of brush around and I had a clear view of vertical and radials while operating. | + | Though I used insulated wire, there might be a risk of someone or animal getting RF burn. But, area was at a dead end with lots of brush around and I had a clear view of vertical and radials while operating. |
Antenna: | Antenna: | ||
Line 17: | Line 17: | ||
- 1/2" (IIRC) grey PVC sections to join bamboo stake poles; at least 1/2 the poles fit; they vary in OD. | - 1/2" (IIRC) grey PVC sections to join bamboo stake poles; at least 1/2 the poles fit; they vary in OD. | ||
- | - 16.5' #28 vertical wire direct to coax | + | - 16.5' #20 vertical wire direct to coax |
- 4 ground radials direct to coax shield; two radials are ~ 7' others ~ 4' | - 4 ground radials direct to coax shield; two radials are ~ 7' others ~ 4' |
blog/2021-03-08/cq_dx_2021.txt · Last modified: 2021/03/09 09:01 by ve7tbn