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| The URLs of web sites outside of the Tonne Software site are offered for your convenience in accessing related technical information. Please be aware that when you exit this site, the privacy policy stated on our web sites may NOT be the same as that on other web sites. We can't attest to the accuracy of information provided by these other sites. Providing access to a given site does not constitute an endorsement by Tonne Software of that site or its contents. |
| RealHamRadio | Extensive info on GPS frequency standards, 6-meter amplifier and filter, other amateur radio items. |
| 4NEC2 | An antenna analysis program (URL updated 2MAR13) |
| EZNEC | A well-established antenna analysis program |
| NEC2GO | A site featuring a simplified-interface Windows version of NEC2 |
| L. B. Cebik | L. B. Cebik's site for antenna information - a standard of comparison for this field |
| Circuit Sage | The Circuit Sage with a large collection of technical links and references |
| U. K. Microwave Group | U. K. Microwave Group - software and links page |
| Bausch-Gall | A concise listing of computer-aided engineering links |
| Amateur Radio ND2X | A serious amateur radio site with an emphasis on power amplifiers and Russian tubes |
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