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| To: | [email protected] |
|---|---|
| Subject: | LF: 73KHz notes |
| From: | "g3ldo" <[email protected]> |
| Date: | Mon, 30 Jun 2003 21:38:03 +0100 |
| References: | <000001c33ed1$d6f25ac0$5967fea9@p4o2b7> <001401c33ee5$b2c08460$2602a8c0@WorkGroup> <001001c33ef0$5ff6f880$5967fea9@p4o2b7> <000a01c33f10$1af38760$d9c428c3@erica> <000401c33f1e$2ef6c980$d3d0fc3e@p4o2b7> <000401c33f3a$2cb02420$de1686d4@erica> |
| Reply-to: | [email protected] |
| Sender: | <[email protected]> |
When I put up the antenna and switched on the 73kHz station at around 1730 local I later heard/saw Jim BMU but his signal was down. The band seemed quiet and as I tuned across the band there was a change in the pitch of the noise - the sort of thing you get when the receiver is connected to a high Q loop. It turned out that the receiver had been left connected to the HF minibeam, which is only 6m away from the end of the LF antenna. A good example of antenna coupling. When the LF antenna is connected directly to the receiver the QRN masks the change in noise pitch with tuning. LF transmitter/loading coil/antenna performing well on the last day with 4.3 amps antenna current. Jim is clearly audible in beacon mode - time 2030z Regards, Peter, G3LDO |
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