Re: "active antenna preamplifiers" in ham radio May 1986
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If you want unbelievable nulls, that happen in about 5 seconds, buy a Perseus 22. You can also manually steer the signals with it to. If you are using verticals they need to be spaced about 200' apart. If you are using loops they need to be at least 55' apart.
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I just finished building a Modified version of the AMRAD eProbe antenna which uses 4 2SK932 JFETs in parallel. I draws 50mA at 13.8VDC and works great. I am not able to hear WWBV much better than my loop and so far in testing it works well up to 30MHz. It is a lot more quiet then the loop on the VLF and LF frequencies.
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Everett N4CY
In a message dated 3/14/2025 2:41:02 PM Central Daylight Time, martin_ehrenfried@... writes: ?
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Everett N4CY