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mrf458 [2013/03/18 18:57] n1eu |
mrf458 [2013/03/18 18:58] n1eu |
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| //(comments posted by W9GB to qrz.com forum)// | //(comments posted by W9GB to qrz.com forum)// | ||
| - | TEN TEC OMNI-V Final AMP MRF-458 burned out several days ago, so I replaced them with 2SC2879, readjusted bias. | + | AG6JU commented: TEN TEC OMNI-V Final AMP MRF-458 burned out several days ago, so I replaced them with 2SC2879, readjusted bias. |
| It worked OK, except at the 10 meter band the RF output was 75 watts instead of 100 watts. | It worked OK, except at the 10 meter band the RF output was 75 watts instead of 100 watts. | ||
| Just in case somebody have same problem. MRF-458 is difficult to obtain. | Just in case somebody have same problem. MRF-458 is difficult to obtain. | ||
| - | Niko - | ||
| - | The Toshiba 2SC2879 is a well known RF transistor as well .... | + | |
| + | W9GB responded: The Toshiba 2SC2879 is a well known RF transistor as well .... | ||
| The difference between the Toshiba 2SC2879 and the 2SC2879A is that the “A” version is RoHS compliant, | The difference between the Toshiba 2SC2879 and the 2SC2879A is that the “A” version is RoHS compliant, | ||
| and uses an Aluminum Nitrite insulator (color gray) on the header vs. Berillium Oxide (color white). | and uses an Aluminum Nitrite insulator (color gray) on the header vs. Berillium Oxide (color white). | ||
