No, ghosts are scared of strong electromagnetic fields. However, if you operathe the device long enough, the devel might appear. Not in person but through representatives like the FCC 😂

The biasing point of this amp has been calculated for 9V supply voltage. It might work with 3V but I haven't tested it. If you do end up testing it with 3V, please let us know what your results were.

Yes, the signal will be inverted. However, this should not have any audible effects at all. Now that said, the output of the amplifier is fairly high-impedance and is thus not suitable for direct connection to a speaker.

Using phantom power from a mixer for this circuit will require a major re-design. So the short answer is: No, not without modifications.

The amplifier shown in the video works perfectly fine for string instruments, such as a guitar. However, there will be a video showing an improved version soon.

Noted

Yes, that's the likely culprit.

Unfortunately, I don't know. Possible workaround: Measure one of the remeining ones in circuit and guess from there. My assumptions (and the things I would try in that order): Either it's just a simple pull-down resistor where any value like 10K or 1K would work, or it's actually a real bridge with a 0 Ohm resistor. Of course there are no real 0 Ohm resistors but they're sold under that name as pick-and-place machine compatible versions of a permanent jumper. Given the fact that the resistors all connect to the ground-plane, I'd try the 10K from ground to the other side first. With steady hands you can try that without actually soldering anything in place.

​@BalticLab awesome, I'll give that a try

@BalticLab an instagram follower looked up the service manual and found out it's zero ohms. So I'm going to jump the second to last points out

@@gargamel7127 Yes, absolutely, the link can be found in the video description

What you describe should work. There are many different architectures for spark gap transmitters and the version I showed was the best architecture to explain all relevant parts of the circuit. It is, however, not the most clean type. VHF with a spark gap transmitter is challenging, especially if you'd like to achieve relevant power densities for an EMP generator.

@@BalticLab I did it by using parallel connected 1/4 wave pieces of co-ax cable as a resonator, with a plain wire antenna on the end. It was a bit scruffy, but worked, and managed to disrupt unshielded devices around 5 metres away. I was quite surprised at the effect when only feeding the device with around 1500V from a disposable camera flash charger feeding a cockroft-walton multiplier and running from two AA batteries. The secret is to get the frequency high and the spark gap small and fast, but a pressurised gap would be even better with a single low impedance line as resonator. Operating frequency was around 70MHz. I had to dismantle it in the end as two laptops died unexpectedly in quick succession - whether it was the device or not I'm not sure, but I stopped with the experiments just in case. For an EMP generator it is only the peak power that you need to worry about.

Can you help me get an image like yours?

I suspect you didn't get a valid signal or decode because the map is generated from the software, it's not coming from the satellite. Did you hear the tones of the data transmission?

A Wilkinson is not very broadband. Your project sounds like you need to split a large frequency range, correct? In that case, the Wilkinson divider would not be a good design choice.

@BalticLab Thanks. I enjoyed your lesson. I have realized the relatief constraint, as you work with a resonant circuit. Most of the time I use the 20m band though. But yes, not ideal solution indeed. Before this I was thinking about a simple source follower with an hf fet, but I need to figure it out, as I don't want to degrade the signal from the antenna to this SDR receiver.... Any other ideas?

Yes, you will get cancer now and might have less than 1 week to live 😅

The developer solution is 10g of NaoH in 1 liter of water.

You ptobably could get away with it but I would only recommend trying if you never want to undo the mod as this will likely damage the associated PCB traces

It's a VEVOR 50W CO2 power supply

So we're you able to control only voltage with this without changing the current? I'd like to use this for an ion experiment in a vacuum, but my fear is that once the gas ignites the voltage will drop drastically to maintain the current setting when voltage is what I care about more than current.

The Radiacode detects Beta and Gamma. Alpha traces are optained through secondary x-ray emissions or Bremsstrahlung

Exactly that was my intent, easy replication without highly specialized equipment. Let me know how it goes!

@@ralfschooneveld3186 Unfortunately, no. I think you'd have to go through some multiplication stages to go up that high.

@@BalticLab Ive got a paper where thery went up to 0.1Thz and 0.48Thz, but no details. ''Frequency multiplier units based on SBDs, impact ionization avalanche transit-time devices (IMPATTs), tunneling transit time diodes (TUNNETT), and resonant tunneling diodes (RTDs).

@@ralfschooneveld3186 That would be 100 GHz to 480 GHz, no need to express that in THz. Though many research papers want to push THz, so they use stuff like "near THz" to push keywords.

I lice my PCB traces intact :-)

Thanks for your comment. Especially for DIY, electronics (and other science related) topics, it'd be hard for creators to post highly original content that hasn't appeared anywhere else in some shape or form. And I think it's perfectly fine to post ones own version as every creator has a different take on things, a different presentation style and focuses on different aspects. Also, topics such as this are easily researchable if the person is aware of what to look for. Many people do not know that they can receive weather satellite images themselves. So of course this is interesting for people who never stumbled across this before. That others have done something similar, or highly adjacent, is something I frequently mention in my videos because - unlike other creators - I actively encourage viewers to look around other channels. People like different presentation styles and formats. So if someone finds a different creator after watching this video, who better matches their prefered style, I am happy for them. From my research I am the only one showing a very simple V-dipole directly into a RTL-SDR on a Windows PC. So while the topic isn't new, this is a differen take on things.

Eagerly anticipating your video.

Wow. You are a bore.

The output is the desired signal, the counter-pin, or reference pin, is ground.

I honestly don't know but some viewers indicated that its the same for tue 8900

You can limit the current to 1 mA by adding a current limiting resistor in series. Just make sure its appropriately rated for the voltage and the dissipated power.

@@BalticLab Okay I'll give it a go! Thanks for the reply!

Unfortunately, that is true. I now have a Radiacode 103 and the differences are quite significant: kzbin.infoAVM8EzvVCiI

@@robert48719 Basically 😅