Profile cover photo
Profile photo
Paolo Borsa
403 followers -
There are 10 types of people in the world: those who understand the binary system and those who doesn't understand it
There are 10 types of people in the world: those who understand the binary system and those who doesn't understand it

403 followers
About
Paolo's posts

Post has shared content
Nuovo dipolo, installazione temporanea. 40 metri monobanda, balun ruthroff 1:1. Il dipolo e' installato sulla linea est-ovest, in discesa verso il lato ovest, quindi i lobi di irradiazione dovrebbero essere nord-sud, e un pochino piu' verso ovest che est. La foto panoramica non rende giustizia, quindi ho aggiunto anche una normale.

I report di ricezione WSPR pero' mostrano diversamente (non ho fatto TX, non ho ancora costruito un cavo pc-microfono).
Il nord Europa e' ben coperto. Inaspettati risultati dagli USA e perfino dalla Nuova Zelanda. Devo ancora provare in TX e forse sulla terza armonica, sui 15 metri... dovrebbe funzionare.

Ma... sono quasi sordo a sud... vedi il report WSPR ingrandito. Come mai? So che ci sono tanti radioamatori in Italia. Se prendo un nominativo a caso tra quei pochi che ho ricevuto, e visualizzo il loro report WSPR, ne posso essere certo.
Forse il dipolo e' troppo basso? (Dopo tutto, una delle sue estremita' quasi tocca il tetto). O forse il palo che lo sostiene all'altra estremita' influisce?

PhotoPhotoPhotoPhoto
22/04/17
4 Photos - View album

Post has shared content
New dipole, temporary installation. 40m monoband, 1:1 voltage balun. The dipole is installed on the line east-west, sloping down on the west side, so the irradiation lobe should be north-south, and a bit more west than east. The panoramic photo don't do justice, so I also added a normal one.

The WSPR RX report shows otherwise (I didn't do TX, I still have to build a computer-microphone cable).
North Europe is quite well covered. Unexpected results from USA and even New Zealand. I still have to try TX and perhaps a third harmonic on the 15 meter, it should work.

But... I am almost deaf on the south, see the WSPR enlarged detail. How come? I know for sure there are many HAMs in Italy. If I take one of them and plot their WSPR map, I can be sure of that. May it be the dipole is too low? (After all, the end of it almost touch the roof)...


PhotoPhotoPhotoPhoto
22/04/17
4 Photos - View album

Post has attachment
Nuovo dipolo, installazione temporanea. 40 metri monobanda, balun ruthroff 1:1. Il dipolo e' installato sulla linea est-ovest, in discesa verso il lato ovest, quindi i lobi di irradiazione dovrebbero essere nord-sud, e un pochino piu' verso ovest che est. La foto panoramica non rende giustizia, quindi ho aggiunto anche una normale.

I report di ricezione WSPR pero' mostrano diversamente (non ho fatto TX, non ho ancora costruito un cavo pc-microfono).
Il nord Europa e' ben coperto. Inaspettati risultati dagli USA e perfino dalla Nuova Zelanda. Devo ancora provare in TX e forse sulla terza armonica, sui 15 metri... dovrebbe funzionare.

Ma... sono quasi sordo a sud... vedi il report WSPR ingrandito. Come mai? So che ci sono tanti radioamatori in Italia. Se prendo un nominativo a caso tra quei pochi che ho ricevuto, e visualizzo il loro report WSPR, ne posso essere certo.
Forse il dipolo e' troppo basso? (Dopo tutto, una delle sue estremita' quasi tocca il tetto). O forse il palo che lo sostiene all'altra estremita' influisce?

PhotoPhotoPhotoPhoto
22/04/17
4 Photos - View album

Post has attachment
New dipole, temporary installation. 40m monoband, 1:1 voltage balun. The dipole is installed on the line east-west, sloping down on the west side, so the irradiation lobe should be north-south, and a bit more west than east. The panoramic photo don't do justice, so I also added a normal one.

The WSPR RX report shows otherwise (I didn't do TX, I still have to build a computer-microphone cable).
North Europe is quite well covered. Unexpected results from USA and even New Zealand. I still have to try TX and perhaps a third harmonic on the 15 meter, it should work.

But... I am almost deaf on the south, see the WSPR enlarged detail. How come? I know for sure there are many HAMs in Italy. If I take one of them and plot their WSPR map, I can be sure of that. May it be the dipole is too low? (After all, the end of it almost touch the roof)...

PhotoPhotoPhotoPhoto
22/04/17
4 Photos - View album

Post has attachment
New dipole, temporary installation. 40m monoband, 1:1 voltage balun. The dipole is installed on the line east-west, sloping down on the west side, so the irradiation lobe should be north-south, and a bit more west than east. The panoramic photo don't do justice, so I also added a normal one.

The WSPR RX report shows otherwise (I didn't do TX, I still have to build a computer-microphone cable).
North Europe is quite well covered. Unexpected results from USA and even New Zealand. I still have to try TX and perhaps a third harmonic on the 15 meter, it should work.

But... I am almost deaf on the south, see the WSPR enlarged detail. How come? I know for sure there are many HAMs in Italy. If I take one of them and plot their WSPR map, I can be sure of that. May it be the dipole is too low? (After all, the end of it almost touch the roof)...


PhotoPhotoPhotoPhoto
22/04/17
4 Photos - View album

Auguri, buona Pasqua

Happy Easter

Frohe Oster

Post has shared content
Dipolo OCF "Windom" per i 40m, auto costruito.

A causa delle restrizioni che ho a casa, l'ho installata in discesa da un palo di 6 metri verso la fine del tetto. Balun Ruthroff 4:1 su Amidon T200-2, circa 3.2 metri di coassiale, quindi Guanella choke coassiale su FT240-43, scaricatore di fulmini e finalmente la linea di discesa verso la stazione.

Sono abbastanza sicuro che le grondaie metalliche interferiscono, e forse le lunghezze delle due braccia non sono corrette, perché il ROS è molto alto su tutto lo spettro HF e l'antenna è sorda, mentre invece mi aspettavo una miglioria, ricevevo molto meglio con 20 metri di random wire.

PhotoPhotoPhotoPhotoPhoto
14/04/17
6 Photos - View album

Post has shared content
OCF "Windom" dipole for 40m, self made.

Due to my house constraints I installed it sloping down from a 6 meters tall pole towards the end of the roof. Balun Ruthroff 4:1 on Amidon T200-2, about 3.2 meters coax line, then Guanella coax choke on FT240-43, lightning suppressor and at last line for the rig.

I am quite sure the metal gutters interfere, and perhaps the length of the dipole arms aren't correct, because the SWR is very high on all the HF spectrum and the antenna is deaf, while I was expecting improvements, I could receive much more and much better before with a 20 meters random wire.

PhotoPhotoPhotoPhotoPhoto
14/04/17
6 Photos - View album

Post has attachment
Dipolo OCF "Windom" per i 40m, auto costruito.

A causa delle restrizioni che ho a casa, l'ho installata in discesa da un palo di 6 metri verso la fine del tetto. Balun Ruthroff 4:1 su Amidon T200-2, circa 3.2 metri di coassiale, quindi Guanella choke coassiale su FT240-43, scaricatore di fulmini e finalmente la linea di discesa verso la stazione.

Sono abbastanza sicuro che le grondaie metalliche interferiscono, e forse le lunghezze delle due braccia non sono corrette, perché il ROS è molto alto su tutto lo spettro HF e l'antenna è sorda, mentre invece mi aspettavo una miglioria, ricevevo molto meglio con 20 metri di random wire.

PhotoPhotoPhotoPhotoPhoto
14/04/17
6 Photos - View album

Post has attachment
OCF "Windom" dipole for 40m, self made.

Due to my house constraints I installed it sloping down from a 6 meters tall pole towards the end of the roof. Balun Ruthroff 4:1 on Amidon T200-2, about 3.2 meters coax line, then Guanella coax choke on FT240-43, lightning suppressor and at last line for the rig.

I am quite sure the metal gutters interfere, and perhaps the length of the dipole arms aren't correct, because the SWR is very high on all the HF spectrum and the antenna is deaf, while I was expecting improvements, I could receive much more and much better before with a 20 meters random wire.

PhotoPhotoPhotoPhotoPhoto
14/04/17
6 Photos - View album
Wait while more posts are being loaded