Re: Dummy load and wattmeter
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Look forward to seeing that, I need one!
Colin – M5FRA
From: QRPLabs@groups.io <QRPLabs@groups.io> On Behalf Of jjpurdum via Groups.Io
Sent: 19 June 2018 15:04
Subject: [QRPLabs] Dummy load and wattmeter
Al (AC8GY) and I had our Builders' Group build an old fashioned dummy load, but with a power meter, too, as seen here:
We tested it for 5 minutes @ 200W and while the mineral oil got pretty toasty, no damage to the parts. The nice thing is you don't need to tether it to a PC and the meter unit unplugs easily from the DL. It costs about $20 to make and uses a Nano to drive the meter. The meter is one of those 0.96" OLED's. No PCB is needed; just a small piece of perf board because it's so simple. There's a builder's manual for the project, too. If you calibrate it with a know power source, it's reasonably accurate. It will be coming out in the Nov. QST.
On Tuesday, June 19, 2018, 9:24:24 AM EDT, Steve Nichols via Groups.Io <infotechcomms@...> wrote:
Well done Colin,