Re: Topband: 9Q0HQ
The flag, EWW, K9AY and others loaded loop antenna are indeed two non-resonant phased vertical phased 180 degree resulting in a cardioid pattern that provide directivity and a good F/B. When you have another resonant element nearby the interaction changes the pattern, depending on the new resonant element acting as a director or a reflector the new pattern can be very distorted, and it could be any shape. Any loaded loop RX antenna near a resonant antenna has useless pattern and most of the time the signal to noise ratio is the same on the flag or on the resonant antenna. Detuning fiscally the resonant antenna is a must to improve signal to noise ratio. No free beef here. Another factor is the feed line of the flag, Coax does not work well because the common mode current outside the braid works like a vertical if no choked properly, twisted pair unshielded is the only way to avoid use of chokes. Horizontal flag does help but needs to be high above ground. Regards JC N4IS -Original Message- From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Guido Tedeschi Sent: Thursday, March 19, 2015 11:37 AM To: topband@contesting.com Subject: Re: Topband: 9Q0HQ John, the Diamond they used is quite similar to the Pemnant... 73 de Guido, ik2bcp Il giorno 19/mar/2015, alle ore 15:39, "j...@kk9a.com" ha scritto: > I am not sure what supplies that you have available in the Republic of > Congo. A Pennant should fit in your operating area. It is pretty easy > to build and it is not ground dependent. > > John KK9A > > > To:topband@contesting.com > Subject:Topband: 9Q0HQ > From:"alfeo...@tin.it" > Reply-to:"alfeo...@tin.it" > > > Dear friends, we are doing our best effort on the low bands. Being at > the end of the rain season, there is a storm almost every day in the > afternoon.The soil here is very dark and moist, often we need to tune > the high band antennas as the resonance shifts according to water > content.On low bands the noise from static is high, 7 - 9 on 80 and > 160. It is a little better when we are close to the sunrise.On top > band we use a inverted L and on 80m a vertical with a parasite > reflector.We have the feeling that ous signal is strong enough but the > major problem is our capability to cautch the signals out of the > noise. We used a DHDL for few days, no big help. Yesterday we change > with a Diamond, no better result. We still use the verticals on > receiving as it grants the better result in spite of the noise.I am > afraid that a beverage would not help us due to the soil propriety. > Also, there is no enough room to lay a 200m beverage.We are rather > limitaded in resources (wires, cables) as it is no easy and fast to > find the stuff locally.I kindly ask for your suggestion to improve our > receiving capability. > Best 73 > (sorry for my bad English!) > Alfeo I1HJT 9Q0HQ crew > > _ > Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: 9Q0HQ
John, the Diamond they used is quite similar to the Pemnant... 73 de Guido, ik2bcp Il giorno 19/mar/2015, alle ore 15:39, "j...@kk9a.com" ha scritto: > I am not sure what supplies that you have available in the Republic of > Congo. A Pennant should fit in your operating area. It is pretty easy to > build and it is not ground dependent. > > John KK9A > > > To:topband@contesting.com > Subject:Topband: 9Q0HQ > From:"alfeo...@tin.it" > Reply-to:"alfeo...@tin.it" > > > Dear friends, we are doing our best effort on the low bands. Being at the > end > of the rain season, there is a storm almost every day in the afternoon.The > soil > here is very dark and moist, often we need to tune the high band antennas as > the resonance shifts according to water content.On low bands the noise from > static is high, 7 - 9 on 80 and 160. It is a little better when we are > close to > the sunrise.On top band we use a inverted L and on 80m a vertical with a > parasite reflector.We have the feeling that ous signal is strong enough > but the > major problem is our capability to cautch the signals out of the noise. We > used > a DHDL for few days, no big help. Yesterday we change with a Diamond, no > better > result. We still use the verticals on receiving as it grants the better > result > in spite of the noise.I am afraid that a beverage would not help us due to > the > soil propriety. Also, there is no enough room to lay a 200m beverage.We are > rather limitaded in resources (wires, cables) as it > is no easy and fast to find the stuff locally.I kindly ask for your > suggestion to improve our receiving capability. > Best 73 > (sorry for my bad English!) > Alfeo I1HJT 9Q0HQ crew > > _ > Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: 9Q0HQ
I am not sure what supplies that you have available in the Republic of Congo. A Pennant should fit in your operating area. It is pretty easy to build and it is not ground dependent. John KK9A To: topband@contesting.com Subject:Topband: 9Q0HQ From: "alfeo...@tin.it" Reply-to: "alfeo...@tin.it" Dear friends, we are doing our best effort on the low bands. Being at the end of the rain season, there is a storm almost every day in the afternoon.The soil here is very dark and moist, often we need to tune the high band antennas as the resonance shifts according to water content.On low bands the noise from static is high, 7 - 9 on 80 and 160. It is a little better when we are close to the sunrise.On top band we use a inverted L and on 80m a vertical with a parasite reflector.We have the feeling that ous signal is strong enough but the major problem is our capability to cautch the signals out of the noise. We used a DHDL for few days, no big help. Yesterday we change with a Diamond, no better result. We still use the verticals on receiving as it grants the better result in spite of the noise.I am afraid that a beverage would not help us due to the soil propriety. Also, there is no enough room to lay a 200m beverage.We are rather limitaded in resources (wires, cables) as it is no easy and fast to find the stuff locally.I kindly ask for your suggestion to improve our receiving capability. Best 73 (sorry for my bad English!) Alfeo I1HJT 9Q0HQ crew _ Topband Reflector Archives - http://www.contesting.com/_topband
Re: Topband: 9Q0HQ
Try an insulated wire, 66 meters long, on the ground (BOG antenna) If a transformer is not available, connect directly to the receiver auxillary antenna port. Signals will be weak, but noise should be much weaker. Hope this works, It is easy to try. 73 Bruce-K1FZ www.qsl.net/k1fz/bogantennanotes/index.html .I am afraid that a beverage would not help us due to the soil propriety. Also, there is no enough room to lay a 200m beverage.We are rather limitaded in resources (wires, cables) as it is no easy and fast to find the stuff locally.I kindly ask for your suggestion to improve our receiving capability. Best 73 (sorry for my bad English!) Alfeo I1HJT 9Q0HQ crew _ Topband Reflector Archives - http://www.contesting.com/_topband _ Topband Reflector Archives - http://www.contesting.com/_topband
Topband: 9Q0HQ
Dear friends, we are doing our best effort on the low bands. Being at the end of the rain season, there is a storm almost every day in the afternoon.The soil here is very dark and moist, often we need to tune the high band antennas as the resonance shifts according to water content.On low bands the noise from static is high, 7 - 9 on 80 and 160. It is a little better when we are close to the sunrise.On top band we use a inverted L and on 80m a vertical with a parasite reflector.We have the feeling that ous signal is strong enough but the major problem is our capability to cautch the signals out of the noise. We used a DHDL for few days, no big help. Yesterday we change with a Diamond, no better result. We still use the verticals on receiving as it grants the better result in spite of the noise.I am afraid that a beverage would not help us due to the soil propriety. Also, there is no enough room to lay a 200m beverage.We are rather limitaded in resources (wires, cables) as it is no easy and fast to find the stuff locally.I kindly ask for your suggestion to improve our receiving capability. Best 73 (sorry for my bad English!) Alfeo I1HJT 9Q0HQ crew _ Topband Reflector Archives - http://www.contesting.com/_topband
