Epever Tracer 4210AN MPPT Charge Controller MOSFET Repair

Here’s some damage to a 1-week old Epever Tracer 4210AN MPPT Charge Controller, where some of the power FETs have decided they’ve had enough of this world. These are Alpha & Omega AON6512 N-Channel Enhancement devices, rated at 30V 150A. From probing around, these seem to be on the battery

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Test Equipment Upcycling – Variable Attenuator Module

A while back I found myself in the need of an adjustable RF attenuator capable of high-GHz operation. As luck would have it I had an old Spectrum analyser on the shelf at work, which we had retired quite some time ago. Spectrum analysers being quite capable test instruments, I

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Covid-19 Lockdown Projects – Extracting Diesel Heater Exhaust Waste Heat

Since I fitted the new “8kW” diesel heater to the camping power trolley, it has occurred to me that there is a lot of energy in the exhaust gas stream that ordinarily would be wasted into the atmosphere. Since we’re all still on lockdown here in the UK, I figured

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Covid-19 Lockdown Experiments – eBay 1-1000MHz 3W Wideband Amplifier Power Test

Since the entire country is on Coronavirus lockdown at the moment, I figured it was time to get round to finishing off a couple of small blog posts while waiting for the restrictions to be lifted 😉 This is a small two-stage linear amplifier module available on eBay fairly cheap

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