To: | <tentec@contesting.com> |
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Subject: | [TenTec] 60M |
From: | geraldj@isunet.net (Dr. Gerald N. Johnson, electrical engineer) |
Date: | Fri May 16 16:59:04 2003 |
You could use an antenna analysis program like ELNEC or EZNEC or the other NEC products to determine true antenna gain (but they are all 3 dB off when the gain is computed with ground in place because with ground present the reference is only half the energy from the isotropic reference source) at the 5 MHz frequencies. The 10 dB gain claim for the windom is definitely an exaggeration (the trouble with using manufacture antenna gains) and might be approached only at 10 or 6m, not at 60m. Besides 10 dB down from 50 watts is 5 watts, not 20 watts. Presuming the FCC is talking peak watts since there aren't any other kind with a SSB signal. 73, Jerry, K0CQ -- Entire content copyright Dr. Gerald N. Johnson, electrical engineer. Reproduction by permission only. |
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