RG6 measurement: RG6 Double Shield Flooded CopperClad center
Source: ebay CommScope Underground RG6 Coaxial Cable Burial 1000ft ( 180974083483 ) Product Code 4844003 DJT061220121 Measured Data - 1000ft +/- 2.5 % Spool#1 DC Ohms Shield 7.7 Center 26.3 Spool#2 DC Ohms Shield 7.9 Center 27.9 Connectors installed Spool#1 Shield resistance 8.6 Ohms Spool#2 Shield resistance 9.3 Ohms RF measurement HP 8753B 50Ohms |s21|- insertion loss Spool#2 Freq/loss[dB] 1.8/4.17, 3.5/4.82, 7.0/5.8, 10/7.3 Spool#1 Freq/loss[dB] 1.8/4.13, 3.5/4.80, 7.0/5.75, 10/7.27 Inserted two 5filliar 50/75 transformers < 0.1 dB loss and recalibrated VNA |s21| in 75Ohms system Spool#1 Freq/loss[dB] 1.8/4.4, 3.5/5.0, 7.0/5.8, 10/6.5 Spool#2 Freq/loss[db] 1.8/4.5, 3.5/5.17, 7.0/5.9, 10/6.6 |s11| Return loss - floor >50dB with calibration 75 Ohms load Spool#1 Freq/RL[dB] 1.8/ 30, 3.5/32, 7.0/33, 10/34 Spool#2 Freq/RL[dB] 1.8/29, 3.5/33, 7.0/42, 10/34 Conclusion: Could not find Commscope Product code 4844003, the product is more like 4843003 but black. Double shield not as good as quad especially at low frequencies, may not be a issue for me. Need to figure out how to install connectors without the additional shield resistance increase. Ref: http://www.commscope.com/catalog/broadband/product_details.aspx?id=46933 73, Jerry, na0m _________________ Topband Reflector