This is definitely something I’d like to try out https://www.ebay.com/itm/336122632627
 
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This is the same ebay seller that sold the dodgy 15w NRG fm transmitter kit to radio brian that had tons of problems from his post on necks.

I can't see this am transmitter being upto much if he was selling other kits that didn't work, i'm sure brian said the ebay ads disapeared after he contacted them.