Mail Archive Search: <+subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*LF\:\s+Who\s+needs\s+antennas\!\s+\-\s+success\s+with\s+ground\s+electrodes\s+on\s+500kHz\s*$/>

Results:

References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*LF\:\s+Who\s+needs\s+antennas\!\s+\-\s+success\s+with\s+ground\s+electrodes\s+on\s+500kHz\s*$/: 3 ]

Total 3 documents matching your query.

1. Re: LF: Who needs antennas! - success with ground electrodes on 500kHz (score: 1): Author: Roger Lapthorn <[email protected]>; Date: Wed, 16 Jun 2010 21:24:57 +0100; Three people copied me - M0BMU, G7NKS and M0JXM with reports between -21 and -28dB S/N. The wire to the furtherest ground rod is at most 20m long and most of the way it is 1.5m above ground. Once aga; /rsgb_lf_group-archives/html/rsgb_lf_group/2010-06/msg00310.html (13,786 bytes)
2. LF: Who needs antennas! - success with ground electrodes on 500kHz (score: 1): Author: Roger Lapthorn <[email protected]>; Date: Wed, 16 Jun 2010 20:10:50 +0100; Well, I'm amazed. This evening I connected my 500kHz transverter straight to the two connections of my sub-9kHz grounded electrodes and TXed WSPR. No attempt was made to match anything on the assumpt; /rsgb_lf_group-archives/html/rsgb_lf_group/2010-06/msg00506.html (12,146 bytes)
3. Re: LF: Who needs antennas! - success with ground electrodes on 500kHz (score: 1): Author: "Markus Vester" <[email protected]>; Date: Thu, 17 Jun 2010 07:42:17 +0200; Dear Roger, this is interesting! I wonder if you attempted to estimate ERP or antenna efficiency. A measurement of effective height (ie. volts per fieldstrength for RX, or sqrt (EMRP) per current for; /rsgb_lf_group-archives/html/rsgb_lf_group/2010-06/msg00586.html (11,667 bytes)

Current List: 1 - 3
Page: [1]