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 [2017/04/23 09:19] – [measuring of Nagoya NA-701 from CN distributor] yanproject:ok1rbm:sx-600 [2017/04/23 17:17] (current) – [measuring china NA-771] yan
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
  
Line 67: Line 69:
 </table> </table>
 notes: notes:
 +
 a) calculated by equation from documentation SWR = [sqrt(Pf) + sqrt(Pr)]/[sqrt(Pf) - sqrt(Pr)] a) calculated by equation from documentation SWR = [sqrt(Pf) + sqrt(Pr)]/[sqrt(Pf) - sqrt(Pr)]
 +
 b) measured another day, antena hanging freely b) measured another day, antena hanging freely
  
Line 84: Line 88:
 ==== measuring china NA-771 ===== ==== measuring china NA-771 =====
 <table> <table>
-<caption>table 3 - measuring china NA-771 antenna frequency-Pf,Pr values measured by SX-600</caption>+<caption>table 3 - measuring china RH771 antenna frequency-Pf,Pr values measured by SX-600</caption>
 |frq| | Pforw | Prefl | SWR | |frq| | Pforw | Prefl | SWR |
 | | | | | | | | | | | |
Line 94: Line 98:
  
  
-==== measuring taiwan NA-771 =====+==== measuring taiwan NA-701 =====
 <table> <table>
 <caption>table 3 - measuring china NA-771 antenna frequency-Pf,Pr values measured by SX-600</caption> <caption>table 3 - measuring china NA-771 antenna frequency-Pf,Pr values measured by SX-600</caption>
Line 100: Line 104:
 | | | | | | | | | | | |
 |172.000| | 4 | 3.5  | 30{a} | |172.000| | 4 | 3.5  | 30{a} |
-|446.000| | 1.8 | 0.15  | 1.8{a} |+|446.000| | 1.8 | 0.4  | 2.8{a} |
 </table> </table>
 notes: notes:
-a) calculated by equation from documentation SWR = [sqrt(Pf) + sqrt(Pr)]/[sqrt(Pf) - sqrt(Pr)] , measured "hanging freely"+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-600.1492939172.txt.gz · Last modified: 2017/04/23 09:19 by yan