brmlab

User Tools

Site Tools

You are here: Hackerspace Prague » Projects » OK1RBM aka HAM radio » SX 600 simple user guide
project:ok1rbm:sx-600

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revisionPrevious revision
Next revision		Previous revision
project:ok1rbm:sx-600 [2017/01/19 11:26] – yanproject:ok1rbm:sx-600 [2017/04/23 17:17] (current) – [measuring china NA-771] yan
Line 45: Line 45:
 === results === === results ===
 <table> <table>
-<caption>table 1 NA-701 144/430 frequency-SWR valuse measured by SX-600</caption>+<caption>table 1 NA-701 144/430 frequency-SWR values measured by SX-600</caption>
 |frq| |SWR {a}|SWR {b}| |frq| |SWR {a}|SWR {b}|
 | | | | | | | | | |
Line 53: Line 53:
 </table> </table>
 notes: notes:
 +
 a) antena freely hangs from table a) antena freely hangs from table
 +
 b) cable which was connected to antena was held just under antenna to simulate real world enviroment b) cable which was connected to antena was held just under antenna to simulate real world enviroment
 +
 c) SWR start's to be pretty unprecise in those values c) SWR start's to be pretty unprecise in those values
  
 +<table>
 +<caption>table 2 NA-701 144/430 frequency-Pf,Pr values measured by SX-600</caption>
 +|frq| | Pforw | Prefl | SWR |
 +| | | | | |
 +|172.000| | 2.6 | 0.9  | 12.8{a} |
 +|172.000| | 4.5 | 3.2  | 11.8{a,b} |
 +|446.000| | 1.7 | 0.4  | 2.9{a} |
 +</table>
 +notes:
  
 +a) calculated by equation from documentation SWR = [sqrt(Pf) + sqrt(Pr)]/[sqrt(Pf) - sqrt(Pr)]
 +
 +b) measured another day, antena hanging freely
 +
 +==== measuring original baofeng antenna ====
 +
 +<table>
 +<caption>table 3 - measuring original baofeng antenna frequency-Pf,Pr values measured by SX-600</caption>
 +|frq| | Pforw | Prefl | SWR |
 +| | | | | |
 +|172.000| | 4.8 | 3  | 8.6{a} |
 +|446.000| | 3.2 | 0  | 1{a} |
 +</table>
 +notes:
 +a) calculated by equation from documentation SWR = [sqrt(Pf) + sqrt(Pr)]/[sqrt(Pf) - sqrt(Pr)]
 +
 +==== measuring china NA-771 =====
 +<table>
 +<caption>table 3 - measuring china RH771 antenna frequency-Pf,Pr values measured by SX-600</caption>
 +|frq| | Pforw | Prefl | SWR |
 +| | | | | |
 +|172.000| | 3.8 | 2.4  | 8.7{a} |
 +|446.000| | 2.4 | 1.3  | 6.6{a} |
 +</table>
 +notes:
 +a) calculated by equation from documentation SWR = [sqrt(Pf) + sqrt(Pr)]/[sqrt(Pf) - sqrt(Pr)] , measured "hanging freely"
 +
 +
 +==== measuring taiwan NA-701 =====
 +<table>
 +<caption>table 3 - measuring china NA-771 antenna frequency-Pf,Pr values measured by SX-600</caption>
 +|frq| | Pforw | Prefl | SWR |
 +| | | | | |
 +|172.000| | 4 | 3.5  | 30{a} |
 +|446.000| | 1.8 | 0.4  | 2.8{a} |
 +</table>
 +notes:
 +a) calculated by equation from documentation SWR = [sqrt(Pf) + sqrt(Pr)]/[sqrt(Pf) - sqrt(Pr)] , measured "hanging freely" - looked same from hand
 +
 +==== original wouxun antenna =====
 +<table>
 +<caption>table 3 - measuring original wouxun antenna frequency-Pf,Pr values measured by SX-600</caption>
 +|frq| | Pforw | Prefl | SWR |
 +| | | | | |
 +|172.000| | 2.6 | 1.1  | 4.72{a} |
 +|446.000| | 1.9 | 0.9  | 5.4{a} |
 +</table>
 +notes:
 +a) calculated by equation from documentation SWR = [sqrt(Pf) + sqrt(Pr)]/[sqrt(Pf) - sqrt(Pr)] , measured "hanging from hand"
project/ok1rbm/sx-600.txt · Last modified: 2017/04/23 17:17 by yan