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Help with Amp tuning
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Wmalgren
- Super Mud-Duck
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Help with Amp tuning
Hello all, sorry I wasn’t very specific about this topic. So I’ve built a few amps now, a few 2 pills, and a few , straight 4 pills, from scratch. With plans from the internet, plus some YouTube videos. I’ve added a few twist of my own. The one thing I can’t figure out is, how to come up with the input and output capacitance. The schematics show a specific value, and those values work very well. But, I don’t like variables, I don’t run class c because I like to talk ssb. Changing anything, changes the tune. I’ve been tuning by trial and error. That’s kind of messy. I do manage to get them perfect, but, I need to know the math! Any thoughts?
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Lost Ram
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Re: Help with Amp tuning
I just use a variable cap on the input so the radio is happy. Its easy to tune with a meter. Not sure on the math, I might have it written down, if I do I will post it.
CB: TRC-450, Imax
Ham: FTDX101MP, FT-991A ,FT8900-2 meter crossband rig
Ham Antennas: 570', 500', wire loops, 2M Copper Slim Jim X2, CG-144 mobile
"The two enemies of the people are criminals and government. So let us tie the second down with the chains of the Constitution so that the second will not become the legal version of the first."
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Ham: FTDX101MP, FT-991A ,FT8900-2 meter crossband rig
Ham Antennas: 570', 500', wire loops, 2M Copper Slim Jim X2, CG-144 mobile
"The two enemies of the people are criminals and government. So let us tie the second down with the chains of the Constitution so that the second will not become the legal version of the first."
Thomas Jefferson.
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Wmalgren
- Super Mud-Duck
- Posts: 9
- Joined: December 5th, 2018, 12:20 am
- Real Name: Wayne malgren
- Contact:
amps ar Help with Amp tuning
thank you for your input, i do use Arco tuning caps on the input. the output on the other hand< ive noticed that a 150 pf is pretty standerd, its ballpark.
the tuning caps wont handle the power of more then 2 pills.
150 is not always the sweet spot, its time consuming to add or subtract from the output value. i have found a lot of lost watts< in more then a few amps ive played with.
To me, building and tuning linear Amps, is like building hotrods, and a lot cheeper.
the tuning caps wont handle the power of more then 2 pills.
150 is not always the sweet spot, its time consuming to add or subtract from the output value. i have found a lot of lost watts< in more then a few amps ive played with.
To me, building and tuning linear Amps, is like building hotrods, and a lot cheeper.
