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| To: | rsgb <[email protected]> |
|---|---|
| Subject: | LF: 500kHz Distance |
| From: | "lawrence mayhead" <[email protected]> |
| Date: | Tue, 22 May 2007 09:30:25 +0100 |
| Delivered-to: | [email protected] |
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The problem with an erp limit as low as 0.1W is that there is no incentive to develop better antennas. We can easily develop enough power to drive even the most inefficient of antennas. Not like 136 where it needed 1000w to achieve 1W erp even with quite a large ant. so there was an incentive and a challenge to develop better antennas. Attenuation by trees/buildings etc can easily be compensated for by more power so long as we can measure erp accurately at a suitable distance and direction. I think this low power limit may lead to the demise of 500kHz at least among those of us whose interest is in design and development The only compensation is that this limit has created a level playing field on which everyone can play, but where is the challenge? I think that a far better rule would have been to limit the power to say 10W (if it needs to be this low, and I dont think it does , we are all responsible amateurs and should be trusted more ). Then we could work on our own designs , so that developments like Finbars spiral would have a purpose. It will be interesting to see how many are operating still in 9 months time, I think there is already a falling off in interest and activity. As far as Mals comments are concerned no doubt QRSS is not necessesary for UK and near European contacts, but it is essential if greater distance are to be covered so it should be encouraged not denigrated. 73 Laurie G3AQC |
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