Re: Adafruit booster cables and 5V powerbanks as ATS/MTR power sources
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I put my contraption in a hammond die cast box with common mode chokes on the in and out wires. I don't hear it in the RX but while I was testing it open on the bench I certainly did, but that was educational. I know some designs run a fixed switching frequency but what I discovered with mine was that if a birdie came on the shoulder of my filter I could make it fly off by simply tweaking the pot for the output voltage of the switcher because in doing so the switching frequency would change. This gave me the confidence to keep going and put it in a box. The nice thing about it is the USB battery pack can stay in an inner pocket and stay warm and I can tune up at low voltage to save the finals and the change in DC supply voltage which sits outside or in my outer pocket at least, it also allows me to vary my output power by a full S unit. This makes it easy to see if they can still hear you when you QRPp.
On Mon, Mar 4, 2019 at 4:11 PM ajparent1/kb1gmx <kb1gmx@...> wrote: