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License Free, legal, low-power radio broadcasting

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Carl Blare

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@carl-blare

Active 3 years, 9 months ago
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2nd FM25B

Posted on October 9, 2009

I spent the day assembling our second Ramsey FM25B.

I spent the day assembling our second Ramsey FM25B.

The first one we had was good but I gave it to someone who wanted FM in the house. The only thing I remember about it that I’d criticize is poor low frequency in the audio. Otherwise it was frighteningly powerful even with the antenna retracted and the power control minimized.

Although also called 25B, this new one seems different somehow, and better! The audio is spectacular. The strength is way beyond the C.Crane, which I purchased as a guidepost so that a certified transmitter could be used as a point of reference. Unfortunately it’s been raining for three days, so I can’t walk the neighborhood with a portable.

Earlier this week I toyed with the C.Crane FM transmitter and found that adding 1/2
wave or full wave antenna lengths finally gets it to the rooms of the house with a minimum of dropouts. I have a hunch that the output is intentionally reduced to safeguard against people who add antenna length.

Thoughts?

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