Jamez_Warner 0 Report post Posted February 3, 2005 Can bnc ( should it be 50 or 75 ohm ? ) be used at 2.4ghz ? I have lots laying around but no SMA for the GPP James Share this post Link to post Share on other sites
Mr.RC-Cam 123 Report post Posted February 3, 2005 BNC's are available in 50 and 75 ohm. The choice depends on your application (50 ohms for GPP is typical). High quality versions are good to about 4Ghz. Just check the mfg's specs. Share this post Link to post Share on other sites
Jamez_Warner 0 Report post Posted February 4, 2005 thanks, yes specs are up to 4ghz, ok to use a short length of rg58u ( about a foot ) ? James Share this post Link to post Share on other sites
Terry 5 Report post Posted February 4, 2005 I used BNC until I found unreliable results when I was using my helical one day, I found the signal strength would change when I reconected the aerial some times. I use 'N' type now and the results are perfect every time ! Terry Share this post Link to post Share on other sites
Mr.RC-Cam 123 Report post Posted February 4, 2005 ok to use a short length of rg58u ( about a foot ) Loss is 3dB per foot. Skip the coax. Share this post Link to post Share on other sites
Jamez_Warner 0 Report post Posted February 5, 2005 ok first tests were disappointing - slightly less range than old antenna will post some pics tomorrow to see if anything obvious is wrong will also try removing all coax James Share this post Link to post Share on other sites
Mr.RC-Cam 123 Report post Posted February 5, 2005 ok first tests were disappointing - slightly less range than old antenna What was your old Rx antenna? Share this post Link to post Share on other sites
Jamez_Warner 0 Report post Posted February 5, 2005 standard 5cm-ish stick Share this post Link to post Share on other sites
Mr.RC-Cam 123 Report post Posted February 5, 2005 Then there is definately something wrong if your range did not change. Are you sure your system is 2.4Ghz? Share this post Link to post Share on other sites
Jamez_Warner 0 Report post Posted February 7, 2005 yup most definately I just realised the test was a little unfair - it was running at 9v instead of 12v - will this cause a big RF output difference ? James Share this post Link to post Share on other sites
