Re: [digitalradio] Re: Using JT65A and W4CQZ RB for radiation pattern studies.
Hi Julian, What are you using to analyze the WSPR data after downloading? Thank you. 73... Jon W1MNK g4ilo wrote: I don't think you can impute anything meaningful from one set of reports. Normal QSB will make a difference of from several to many dB which can only be averaged out over a period of time. WSPR is much better IMO for this sort of thing. You can leave it running, go and do something interesting, then come back later and download all the spots and take an average. You can also transmit simultaneously on two different frequencies using the test antenna and a reference one and compare the reports each one gets. (You have to start the transmit cycles manually in that case, there is no facility in the software for two copies of the program to use the same pattern of transmissions.) Julian, G4ILO --- In digitalradio@yahoogroups.com mailto:digitalradio%40yahoogroups.com, Andy obrien k3uka...@... wrote: While transmitting on 20M today , using JT65HF software and monitoring the W4CQZ Reverse Beacons for JT65A,, I was lucky enough to get 9 stations report my signal strength from one 45 second transmission. Take a look at the report each station noted at 2136 Europe. I was using my home made ground plane vertical mounted at 17ft (1/4 wave). Southern US stations (mostly SW of me) averaged several dB better signals from me than the Europeans. So can I assume anything meaningful aabout the radiation pattern from this antenna or is the key factor to examine the distance ? The Europeans were twice as far away from my QTH. ES2MA-1 (KO29HI) Heard K3UK on 14076.12 KHz -19dB at 21:36:00Z using JT65A (6755 kms) G4ENZ-1 (IO81vv) Heard K3UK on 14076.11 KHz -17dB at 21:36:00Z using JT65A (3514 miles) F6DKQ-1 (JN37BI) Heard K3UK on 14076.13 KHz -11dB at 21:36:00Z using JT65A (3986 miles) Southern USA KD5JGA-1 (EM16rb) Heard K3UK on 14076.11 KHz -10dB at 21:36:00Z using JT65A N5LYJ-1 (EM03rv) Heard K3UK on 14076.08 KHz -9dB at 21:36:00Z using JT65A (1191 miles) KC5NYJ-1 (EL09rn) Heard K3UK on 14076.11 KHz -11dB at 21:36:00Z using JT65A (1380 miles) N4ABN-1 (DM59pd) Heard K3UK on 14076.10 KHz -17dB at 21:36:00Z using JT65A (1545 miles) WY5R-1 (DM95be) Heard K3UK on 14076.11 KHz -7dB at 21:36:00Z using JT65A (1307 miles) Local VE3CDX-1 (DM26ic) Heard K3UK on 14076.09 KHz -9dB at 21:36:00Z using JT65A (30 miles) Andy K3UK
[digitalradio] Re: Using JT65A and W4CQZ RB for radiation pattern studies.
My own brain, pencil and paper. :) I just average out the reports from different stations. I use two different transmitters to send two WSPR transmissions at the same time and using the same power on different frequencies using the antenna under test and the one I am comparing it to. Julian, G4ILO --- In digitalradio@yahoogroups.com, Jon Maguire w1...@... wrote: Hi Julian, What are you using to analyze the WSPR data after downloading? Thank you.
Re: [digitalradio] Re: Using JT65A and W4CQZ RB for radiation pattern studies.
Julian, I didn't consider the brain. Oh my :-) Excellent information. Brain 1 computer 0. 73... Jon W1MNK g4ilo wrote: My own brain, pencil and paper. :) I just average out the reports from different stations. I use two different transmitters to send two WSPR transmissions at the same time and using the same power on different frequencies using the antenna under test and the one I am comparing it to. Julian, G4ILO --- In digitalradio@yahoogroups.com mailto:digitalradio%40yahoogroups.com, Jon Maguire w1...@... wrote: Hi Julian, What are you using to analyze the WSPR data after downloading? Thank you.
[digitalradio] Re: Using JT65A and W4CQZ RB for radiation pattern studies.
I call it the Meat Computer. --- In digitalradio@yahoogroups.com, Jon Maguire w1...@... wrote: Julian, I didn't consider the brain. Oh my :-) Excellent information. Brain 1 computer 0. 73... Jon W1MNK g4ilo wrote: My own brain, pencil and paper. :) I just average out the reports from different stations. I use two different transmitters to send two WSPR transmissions at the same time and using the same power on different frequencies using the antenna under test and the one I am comparing it to. Julian, G4ILO --- In digitalradio@yahoogroups.com mailto:digitalradio%40yahoogroups.com, Jon Maguire w1mnk@ wrote: Hi Julian, What are you using to analyze the WSPR data after downloading? Thank you.
[digitalradio] Re: Using JT65A and W4CQZ RB for radiation pattern studies.
I don't think you can impute anything meaningful from one set of reports. Normal QSB will make a difference of from several to many dB which can only be averaged out over a period of time. WSPR is much better IMO for this sort of thing. You can leave it running, go and do something interesting, then come back later and download all the spots and take an average. You can also transmit simultaneously on two different frequencies using the test antenna and a reference one and compare the reports each one gets. (You have to start the transmit cycles manually in that case, there is no facility in the software for two copies of the program to use the same pattern of transmissions.) Julian, G4ILO --- In digitalradio@yahoogroups.com, Andy obrien k3uka...@... wrote: While transmitting on 20M today , using JT65HF software and monitoring the W4CQZ Reverse Beacons for JT65A,, I was lucky enough to get 9 stations report my signal strength from one 45 second transmission. Take a look at the report each station noted at 2136 Europe. I was using my home made ground plane vertical mounted at 17ft (1/4 wave). Southern US stations (mostly SW of me) averaged several dB better signals from me than the Europeans. So can I assume anything meaningful aabout the radiation pattern from this antenna or is the key factor to examine the distance ? The Europeans were twice as far away from my QTH. ES2MA-1 (KO29HI) Heard K3UK on 14076.12 KHz -19dB at 21:36:00Z using JT65A (6755 kms) G4ENZ-1 (IO81vv) Heard K3UK on 14076.11 KHz -17dB at 21:36:00Z using JT65A (3514 miles) F6DKQ-1 (JN37BI) Heard K3UK on 14076.13 KHz -11dB at 21:36:00Z using JT65A (3986 miles) Southern USA KD5JGA-1 (EM16rb) Heard K3UK on 14076.11 KHz -10dB at 21:36:00Z using JT65A N5LYJ-1 (EM03rv) Heard K3UK on 14076.08 KHz -9dB at 21:36:00Z using JT65A (1191 miles) KC5NYJ-1 (EL09rn) Heard K3UK on 14076.11 KHz -11dB at 21:36:00Z using JT65A (1380 miles) N4ABN-1 (DM59pd) Heard K3UK on 14076.10 KHz -17dB at 21:36:00Z using JT65A (1545 miles) WY5R-1 (DM95be) Heard K3UK on 14076.11 KHz -7dB at 21:36:00Z using JT65A (1307 miles) Local VE3CDX-1 (DM26ic) Heard K3UK on 14076.09 KHz -9dB at 21:36:00Z using JT65A (30 miles) Andy K3UK
