Return to KLUBNL.PL main page
| To: | [email protected] |
|---|---|
| Subject: | Re: VLF: Outdoor test for different places for active E-field antennas for VLF |
| From: | "Roelof Bakker" <[email protected]> |
| Date: | Thu, 13 May 2010 19:27:07 -0000 |
| In-reply-to: | <[email protected]> |
| References: | <003501caf1fd$9d39a0e0$0401a8c0@xphd97xgq27nyf> <[email protected]> <[email protected]> <[email protected]> |
| Reply-to: | [email protected] |
| Sender: | [email protected] |
| User-agent: | Opera Mail/10.53 (Win32) |
Hello Stefan, Many thanks for sharing your findings. I have done similar tests at 137 kHz and 400 kHz.In a nutshell, it did not pay off to raise the antenna 6 meter ( total height 12 meter) above the semi flat roof of my house, compared to 5 metre high in the garden as the signal to noise ratio did not improve. Unfortunately, I did not monitor the Russian Alpha signals at the time.I did find a 15 dB lower signal level at 11.906 kHz at my city location compared to a a free field location, though. Both antennas were at the same height.I have a few chestnut trees 20 metre away which are full with new leaves and blossom. At 400 kHz they have a screening effect of 1.5 to 2 dB!Maybe you can check the signal to noise issue again when you have a real signal for comparison, to make sure that your assumptions are valid. Enjoy your weekend! 73, Roelof, pa0rdt |
| <Prev in Thread] | Current Thread | [Next in Thread> |
|---|---|---|
| ||
| Previous by Date: | Re: LF: MET Office, Roger Lapthorn |
|---|---|
| Next by Date: | RE: VLF: Outdoor test for different places for active E-field antennas for VLF, Laurence KL1X |
| Previous by Thread: | VLF: Outdoor test for different places for active E-field antennas for VLF, Stefan Schäfer |
| Next by Thread: | RE: VLF: Outdoor test for different places for active E-field antennas for VLF, Laurence KL1X |
| Indexes: | [Date] [Thread] [Top] [All Lists] |