Deleted
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Post by Deleted on Jan 7, 2017 11:57:44 GMT -5
My Imax (about 10 years old) is slowly going kaput. The SWR had climbed to 1.9 a few months ago. Now, it is 2.2. If I use an analyzer, the lowest is 1.7 around 29 MHz, so it is definitely not going any lower with adjustment. I am going to replace it in the spring.
My question is, I am using a TRC-422A with a RM Italy KL-200P. Will the 2.2 damage the amp. Or can I make it til the spring when I replace the antenna?
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Sandbagger
Administrator/The Boss
Posts: 6,250
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Post by Sandbagger on Jan 7, 2017 17:42:54 GMT -5
My Imax (about 10 years old) is slowly going kaput. The SWR had climbed to 1.9 a few months ago. Now, it is 2.2. If I use an analyzer, the lowest is 1.7 around 29 MHz, so it is definitely not going any lower with adjustment. I am going to replace it in the spring. My question is, I am using a TRC-422A with a RM Italy KL-200P. Will the 2.2 damage the amp. Or can I make it til the spring when I replace the antenna? Is the amp tube? If so, you can adjust the loading to compensate for small impedance changes in the antenna, and the tubes will be just fine. Transistor amps, on the other hand, don't like a lot of reflected power, especially if they're already being driven to the max. You can "protect" a transistor amp from high SWR damage by reducing the output power. Or you can temporarily use an antenna tuner to bring the match down.
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Deleted
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Post by Deleted on Jan 7, 2017 18:40:00 GMT -5
Transistor. Small amp. Like 25-30W DK and about 70-100 swing
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