[TenTec] OT: Question to the group -tuner and dipoles

[Darrell Bellerive]

How do you know this? Did you make comparisons with dipoles at greater 
heights? Low power enthusiasts (QRP'ers and QRPp'ers) make lots of 
contacts with very little power, so just because you made contacts 
doesn't mean your antenna was efficient and not affected by ground losses.

100 watts into an antenna system with 13 dB loss is 5 watts effective 
radiated power (ERP).

100 watts into an antenna system with 20 dB loss is 1 watt ERP.

Either case will still make lots of contacts. Any antenna is better than 
no antenna. Just don't think that a very low antenna height is helping 
your transmit signal. You are succeeding in spite of it.

73, Darrell VE7IU



On 16-07-18 03:02 PM, Stuart Rohre wrote:
> Surprisingly, we found the ground losses to NOT affect adversely our 
> use of 100 watt transmitters at Field Days for NVIS to our target 
> areas in state of TX and nearby states.


-- 
Darrell Bellerive
VE7IU