transmit on 472 and 137 KHz bands

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  • Updated 4 years ago
I am looking for a power amplifier for the 137 and 472 KHz bands, similar to the DEM for 144 MHz, see
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Peter Driessen

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Posted 4 years ago

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Photo of Andrew Russell

Andrew Russell

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Not many commercial option that I am aware of.

I have used a 100W amp from a junked HF transceiver with 50W out for a mW in at 475KHz. Home made filters.

I am cloning a SpilsburyNDB as I have the bits.

0.1MHz to 1MHz. Some are sometimes available on eBay.

Minicircuits may have a brick amp but will not be cheap and you will still need filters and switching.

Andrew VK5CV