Barb,
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Read the 7806 datasheet, you definitely need a cap at the output to ground.
You may already have the required cap for the input pin close enough, but also check that.
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Jerry
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On Sat, Apr 12, 2025 at 07:55 AM, Barb WB2CBA wrote:
I got couple of emails how to power 7408 with 6V in QMX+.?
This is how I modified mine, lift pin 14 of 7408 from pcb carefully. Add a 7806 voltage regulator to 12V input and connect lifted up pin14 to that 6V regulator. That’s all. This will improve your high bands dramatically.
