Isoprenoid

joined 1 year ago
[–] [email protected] 6 points 1 week ago

Yes, people didn't exist back then.

[–] [email protected] 28 points 1 week ago

Using Twitter was the mistake.

[–] [email protected] 12 points 1 week ago

Erm, actually 🤓 potatoes that are fried will have a different texture even in the stomach.

[–] [email protected] 1 points 2 weeks ago* (last edited 2 weeks ago) (1 children)

Efficiency might not be the point, but not frying your amp is good.

I don't want to break the amp, but I'm expecting my first attempt to be non-ideal.

I’d guess that the know-how to do that would amount to a good crash course in many of the other analog concepts you might need, like what near-field means.

Yes, that is exactly why I am asking here. I was hoping someone could point me in a direction.

MW is defined as being over 100m wavelength, so any antenna below 25m is electrically short in those frequencies.

Yes, I would likely use a Hertzian dipole. Which is inefficient. So not likely to cause much distant interference.

[–] [email protected] 1 points 2 weeks ago (3 children)

This came across as someone who might not know what they’re doing.

Yup, that's why I'm here. I thought that was the point of "IWTL"?

What’s your plan to manage the resulting SWR?

I have a NanoVNA so could build a small dipole. High efficiency isn't really the point.

I'm not going for anything fancy, I just want to know the basics of how to design and build an RF amplifier.

What this device’s output, exactly?

It's only in the mW region. The effective transmission is only within a metre (3 feet) of the device.

how many dB

Gain can be small, even if it's 10 or 20 dB. I want to learn the principles of design and then I can work from there.

[–] [email protected] 1 points 2 weeks ago* (last edited 2 weeks ago) (6 children)

Using somebody else’s band, besides being a crime, is just kind of a dick move.

This depends on the jurisdiction, and the amount of interference. I'm not from the US.

The amount of power I'll be using won't even interfere with suburban neighbours.

https://en.wikipedia.org/wiki/Short-range_device

What’s your use case, exactly?

Transmitting music to AM receiver radios in a house.

[–] [email protected] 7 points 2 weeks ago

It helps to discuss problems with someone, even if they aren't an adult. It helps with getting different perspectives, because we all have blind spots.

If you're determined to go it alone, I at least recommend Rubber Duck Debugging.

I couldn't tell you how many times this technique has helped me work out what was wrong my code / problem. The majority of the time it's something simple.

[–] [email protected] 25 points 2 weeks ago

And think about the savings in road rage stress, and time wasted commuting.

[–] [email protected] 11 points 2 weeks ago

Did you watch only the first hour of the first movie?

Dude, if someone's opening pitch sucks then they have failed as a creative. That's a skill issue and indicates that the rest of the work sucks.

You should only need to watch the opening to the LOTR movies to gauge if you'll like it or not.

That's a five minute investment before you continue watching a 9+ hour work.

[–] [email protected] 4 points 2 weeks ago (2 children)

Video is not available in your country.

[–] [email protected] 10 points 3 weeks ago (44 children)

Can someone explain the joke?

[–] [email protected] 58 points 3 weeks ago

That officer has a history of other complaints, including from his former colleagues, according to the sheriff.

"There was no way that we could have prevented this."

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