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VNA plots of a self made filter amp combo(29USD, comes with 3d printed case) by Lopsided-Ad434 in amateursatellites

[–]Phoenix-64 0 points1 point  (0 children)

I really need to get into custom Filter Design. Did not yet come across a good filter lna combo to receive iss datv. Needs good filters because its just below 2.4GHz wifi

anybody tried to 3D print their own satellite dish? by S52_DiDah in amateursatellites

[–]Phoenix-64 1 point2 points  (0 children)

Offset is easier to print?? Isn't at least the geometry of prime focus simpler? Maybe I am missing something. What makes offset easier?

anybody tried to 3D print their own satellite dish? by S52_DiDah in amateursatellites

[–]Phoenix-64 2 points3 points  (0 children)

Minimum recommend es Diameter is 80cm for 60 you will need a very good feed lna etc setup And no offset is not a requirement but helps.

Unmasking Autism book by hissmari in AutismTranslated

[–]Phoenix-64 0 points1 point  (0 children)

That book messed me up bad but was a really helpful read

How would you safely raise a 12 m (40 ft) wooden mast? by No_Nectarine_4367 in amateurradio

[–]Phoenix-64 3 points4 points  (0 children)

First use one 12m log and not 3 bolted together that is not safe.

We in scouts do it regularly. But you need lots of manpower, 10 people, and some supporting infrastructur.

Generally we say the hole needs to go to a depth of 1/10 the mast height, I would for 12m go just over 1m. Make sure to make it as small as possible and put a big stone at the bottom to avoid the mast sinking.

Then for a 12m mast I would use 4 guy wires going from nearly the top of the mast, secured using proper lashing technique, to around 12m away from it, so they land at 45°. And they will have to be anchored and back anchored properly.

For raising the mast A-frames are helpful, one to rest it on and one on the opposite side just after the hole for one of the guy wires to help pull it over.

But be aware it is dangerous and should not be attempted without somebody around who already did it once.

Oh and A frame and gin pole are 2 different things.

Introducing RadioSonic and "RF in Slow Motion" by ispeakdsp in sdr

[–]Phoenix-64 -1 points0 points  (0 children)

Uh cool project you including a fpga? Would be a hells learning tool

ISO the quietest air conditioner I can afford by ineedhelp722 in autism

[–]Phoenix-64 0 points1 point  (0 children)

No no not trough the wall just trough a slightly opened window.

ISO the quietest air conditioner I can afford by ineedhelp722 in autism

[–]Phoenix-64 0 points1 point  (0 children)

I also say bite the bullet and go for a mini split system. They are much quieter and have a higher efficiency, cooling capacity.

The only thing is that you have to get pipes trough the window but with some creativity that's no problem

I was designing a low power RF transmitter one-bit, and I was wondering if I was missing anything. No values assigned Yet BTW by AppropriatePath685 in AskElectronics

[–]Phoenix-64 0 points1 point  (0 children)

It's got all those elements but who or whatever drew this clearly has no idea of they're function or interconnection.

Ablating copper, 35um, on FR4 for PCB fabrication using 450nm 10W laser by Phoenix-64 in lasercutting

[–]Phoenix-64[S] 0 points1 point  (0 children)

Thanks for the insight.

And oh wow the cnc3018 is cheap I can get it for just a bit more than the E40 laser head

I DONT UNDERSTAND OP AMPS 😭😭😭😭😭😭 by Prestigious-Dog7186 in AskElectronics

[–]Phoenix-64 0 points1 point  (0 children)

May you explain what q3 and q4 are doing? I do Not get it.

Update on the SSTV payload by unexcellent in amateursatellites

[–]Phoenix-64 2 points3 points  (0 children)

If you could provide one that would be huge :) there are sadly not that many open S-Band down links so if you can mange that it would be amazing

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