16-03-2016, 09:16 AM
Hi.
I've found it very difficult to tell if one type of coax is actually better than another on Medium & Long waves.
Although a magic eye can give a rough indication of signal levels I would say an "S" meter is more accurate as is using a scope with a receiver with the AGC switched off.
I have actually used good quality audio screened cable over 5 or 6 meters of unknown impedance with no signal drop vs quality 50 ohm feeder.
Where you do find the difference is on an extended run 10 meters and more, then all cables due to loss and capacitance require proper matching.
As an aside I was greeted by a few US stations in the "X" band (1611-1700 Khz) on Monday and also Greenland on 570Khz, this was on the modded Wellbrook, switching to the frame aerial resulted in noise over these stations and no audible results.
US is difficult for me as I am in a built up area albeit at a good height, I have heard US MW stations before but not at this signal level.
I've found it very difficult to tell if one type of coax is actually better than another on Medium & Long waves.
Although a magic eye can give a rough indication of signal levels I would say an "S" meter is more accurate as is using a scope with a receiver with the AGC switched off.
I have actually used good quality audio screened cable over 5 or 6 meters of unknown impedance with no signal drop vs quality 50 ohm feeder.
Where you do find the difference is on an extended run 10 meters and more, then all cables due to loss and capacitance require proper matching.
As an aside I was greeted by a few US stations in the "X" band (1611-1700 Khz) on Monday and also Greenland on 570Khz, this was on the modded Wellbrook, switching to the frame aerial resulted in noise over these stations and no audible results.
US is difficult for me as I am in a built up area albeit at a good height, I have heard US MW stations before but not at this signal level.
