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525finals [2007/04/30 17:22] n5na created |
525finals [2007/05/21 00:42] |
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| - | ====== Argosy Final Transistors ====== | ||
| - | **From the Ten-Tec Reflector October 1, 2006** | ||
| - | The Argosy uses the following transistors in the final amplifier: | ||
| - | |||
| - | 1 x MJE-520 (Q3) | ||
| - | 2 x MRF-476 (Q1, Q2) | ||
| - | 2 x MRF-477 (Q4, Q5) | ||
| - | |||
| - | The hard ones to find will be the MRF-476's and -477's. Cross Ref. for the MJE-520 is an NTE-124 at $2.29 ea. at Mouser | ||
| - | |||
| - | JT Croteau - W6FO | ||
| - | |||
| - | ---- | ||
| - | **October 1, 2006** | ||
| - | |||
| - | The final transistors are MRF 477. RF Parts still has them available. One pair per customer limit. Kind of pricey but available. | ||
| - | |||
| - | This is one radio you definitely want to protect with the Airpax circuit breaker. | ||
| - | |||
| - | The drivers are MRF 476 and RF Parts suggests substituting 2SC2166. | ||
| - | |||
| - | I understand there is a company producing many of the Motorola MRF transistors including the MRF 477 used in the Argosy. Don't remember the name of the company at the moment. At one time I sent an email to them asking about the MRF 477 but have not heard from them. | ||
| - | |||
| - | 73, | ||
| - | |||
| - | -Lee-\\ | ||
| - | WA3FIY | ||
| - | |||
| - | ---- | ||
| - | **October 1, 2006** | ||
| - | |||
| - | Found it. The company is Advanced Semiconductor, Inc. An Internet search will find them. I do not know anything about the company and I am not endorsing them in any way. | ||
| - | |||
| - | 73, | ||
| - | |||
| - | -Lee-\\ | ||
| - | WA3FIY | ||
