Hacker Read

galangalalgol · 2019-12-20 20:10:57+00:00

I'll add that there are no SDRs from ettus, lime, or hackrf that put out even .25w without a separate amp. So he won't break the limit by accident.

raverbashing | karma 22421 | avg karma 1.64 · | 2021-07-08 18:17:53+00:00

> Surprisingly, this amplifier only produced 20 watts of power, not much more than a handheld walkie-talkie.

Humm I thought actual radio power of walkie-talkies were in the mW range (for regulation and power consumption reasons).

But yes, 20W of radio power is not little (actually it is a lot)

reply

sidewndr46 | karma 3744 | avg karma 1.78 · | 2023-11-15 08:34:14

The power limit would be 15 W EIRP under that provision. It's basically useless to amateurs

JustSomeNobody | karma 7775 | avg karma 1.58 · | 2018-12-19 16:24:17+00:00

Are you missing a 0? I thought the FCC limited it to less than 1000mW.

Aloha | karma 12950 | avg karma 2.76 · | 2016-02-02 21:36:07+00:00

the power limit is 1/2 watt.

recursive | karma 9788 | avg karma 2.06 · | 2021-01-25 11:55:28

750W is a lower bound.

numpad0 | karma 6056 | avg karma 1.35 · | 2021-07-28 19:35:08

It’s absurd, as a microcontroller. Like ~300mA max which is like 1W. Though only in short bursts if planned wisely, and also there are worse ones. I believe Nordic nRF does 2A bursts that are to be taken care of by a larger than usual bypass cap.

MR4D | karma 5981 | avg karma 2.58 · | 2023-05-19 16:30:47

Also, nothing was said about the maximum design power of this device. For all we know, they could ramp it up to 10x the power with a different power unit.

simcop2387 | karma 5031 | avg karma 2.25 · | 2013-05-09 02:28:44

Looking at the hardware he's got there, 10-15 mW max.

RhysU | karma 1607 | avg karma 1.41 · | 2023-01-04 20:02:04

"Shouldn't" and "can't" are different things.

I can power a couple of radios with far less than a full generator.

reply

numlock86 | karma 1989 | avg karma 2.65 · | 2021-12-06 12:35:07

1kW? Are you crazy??? Let's see 25mW, which is the maximum you are allowed to use in Germany for 868 MHz ...

swebs | karma 5051 | avg karma 3.02 · | 2018-09-30 14:22:08+00:00

There are exemptions below a certain wattage. I believe 1kw.

xxpor | karma 8959 | avg karma 2.97 · | 2019-03-05 21:28:16+00:00

750W is the legal limit in the US, so the market for anything over that will be relatively small.

cptskippy | karma 9386 | avg karma 2.4 · | 2019-04-23 23:17:52

> The redundant Tesla setup by comparison pulls 100 watts total. [2]

Hmm... I recalled him saying 72w in the presentation compared to 54w in the previous hardware. Then he said this was within the allotted power envelope and wouldn't impact range.

reply

mobilio | karma 920 | avg karma 1.46 · | 2022-01-05 06:35:27

That's i'm afraid too.

If on paper their TDP is 250W, but on real-life scenario jump to 350W or even over then situation will be screwed.

reply

aosmith | karma 415 | avg karma 1.15 · | 2022-07-09 05:04:29

Nobody cares about the ism band, I doubt anyone has ever been "busted" using under a watt.

nullc | karma 17907 | avg karma 3.08 · | 2022-04-27 12:05:43

I had a single AV receiver that was using over 100w in its "off" state, one device alone easily blowing past that £30 figure.

endless1234 | karma 495 | avg karma 2.56 · | 2021-10-04 09:09:41

I don't think 18 watts is enough to do everything.

LesZedCB | karma 2238 | avg karma 2.38 · | 2022-03-03 14:56:04

100W tho.

point being a lot can be done with specialized equipment. this was a 43km transmission with a usb dongle and basically a pringles cantenna from almost 20 years ago.

reply

PetahNZ | karma 406 | avg karma 1.91 · | 2020-09-18 14:43:35+00:00

Well I can supply plenty of watts, but at some point I reach the limit of performance.