Відео

just use a quality microphone capsule like the WM 52-BT from Panasonic. It has more gain than the Mic you used. No PCB adapterboard needed

boing boing boing boing

You may be able to synchronise it with some kind of optical sensor

This would be helpful if you recorded what you were doing - most of the video is a desk and Christmas decoration because you weren’t holding your work within sight of the camera lens. It can be helpful to set up your camera and mark the area on your desk that will be within shot to guide you where to position your work and hands.

Hi nice video, can you make video or give me please advice how to make the permanent Magnets (neodymium) Finder? Like how detect the magnetic field of the magnet from few centimeter?

looks total easy..... not

ببخشید کارایی اصلی این دسگاه چیست؟؟ برای یافتن ژلادرزیرزمین هم کارایی دارد،❤❤❤

Hi, what is the size of shrink tube you use?

😮

I think you want to select "Iambic B" or "Iambic A" to have Vail respond to the way you are keying :) Or my personal favorite, Ultimatic.

Thank you for this. I have an RT95 with low TX power (<1W on both VHF and UHF) and I'm getting the runaround from Retevis. I'm going to try and change the final myself. Any tips for working around the heatsink? Can it be temporarily removed from the bottom of the PCB? I have a hot air solder rework station and it would be nice just remove the final from the top but I think the heatsink will fight me. Also, I love your work mat; It looks like the innards from a Sinclair ZX81.

Could you share schematic diagram and code?

Thanks for the video and battery information!

is it worth to replace SO239 to N type antenna connector?

dude! The audio track is to much man., Im out of here

A very good presentation, especially explaining the swr side of things. Most others on UA-cam seem to forget this and concentrate on just achieving 50 ohms. Its a very neat compact design, most would be going for the traditional empty syrup can 😂. Cheers.

How did you do that😮show me steps please😮😊❤

1. Tube Arrester 2. It oscillates whn the capacitor charges and builds enough voltage to discharges through the tube 3. Time it takes for the capacitor to reach the breakdown voltage of the gap in the tube, in this case, your bulb, the capacitor in series(yellow), the capacitor(brown) value and the input voltaage u have given 4. you added the bulb in series so it takes longer for the capacitor to build up voltage 5. Diodes rectifier, capacitor in parallel to the tube to set frequency, capacitor in series to the circuit probably to limit the current flow into the circuit same for the bulb 6. No, capacitors don't have path to discharge

Is it a spark gap?

can i use 12.4V on it? ( i do not know at what point saying 12 is the limit for these kits... most of 12v transformers give a bit more +0.4. Is it safe ? Thanks!

1: I don't know what kind of tube this is, but it behaves like a unipolar sidac it seems. I really would like to know which tube it is! Is it a surge/lightning arrestor maybe? 2: The brown capacitor is charged until the breakdown voltage of the tube is reached, at that point the energy inside the capacitor is dumped in the arc. When the voltage is low enough, the arc breaks and the capacitor charges again. This takes some time. Then it all happens again => oscillation. 3: The frequency is limited by the current through the 60W bulb and the value of the capacitors. 4: If you use a small wattage bulb in series it probably will be slower. Lowering the input voltage can also lower the rate (until it's too low). Radiating the tube might increase the frequency. 5: The diodes and capacitors form a voltage multiplier, the 470nF capacitor stores the energy. 6: Only after discharging the capacitors first!

Where can I buy this replacement battery?

Ich suche das Schaltbild für CASIO SA-10

Can you please post the details of the syntax that you used to accomplish the “steps” you usually do? I am trying to learn both Linux and how to use the VLF Receiver ToolKit. I can’t get vtread to accept the .WAV files that I recorded during the eclipse on 4/8/2024. Thanks for any help you can offer.

Do you think it would be feasible to replace the faceplate ribbon cable with a longer one and use it detached?

Nice QMX video! Thanks! 73 de EXØQKT!

Shame about the crap music. Yes I turn off the sound and use CC if available.

Good video, with good information. Definitely could do without the doinky repetitive drum beat in the background.

Where did you get the JPC-12 vertical?

Hi Adam, I actually planned some similar setup. I think it's a good idea to combine a) battery, b) active speaker, c) paddle and d) QMX in one unit as it increases the failure safety in the field. But on the other hand, I already own ready made battery boxes and active speakers. And for the paddle, I thought of mounting a Puttikeg or similar keyer on a leg / knee strap, so I can operate it slip free. I once keyed CW >30 WPM, but those days I've used a homebrew sensor paddle with no moving parts. Testing even top-notch finest mechanical paddles recently, I'm disappointed with the "delay" introduced by the mechanical movement of the contacts, even when it's very short in time. So I might revert to the sensor design.

nice work!

Hello. I guess you gave up on the idea. You haven't posted the second part.

Great project thanks for sharing. Now, the Iambic paddle has two outputs to determine the Dits and Dats, the straight key only one output, how is the straight key connected to produce the different sounds?

You are using resistors that give you 50.9Ohms but the standard calls for 50Ohms. If I use 20-1K Ohm resistors I would have 50Ohms load. By using your equations I can’t calculate the VSWR 0:34

Seriously. I hate (and scared) to see this kind of signal. It's like the movie about an al*en invasion scrambled our earth signal 😂😂. Pardon me ✌️

Very interesting! You probably already know this- petroleum jelly or beeswax work very well on gaskets and seals for this sort of thing. David.

hello. are there any marks on battery? I'm looking for replacement too.

i like

a może być dobrze zepsute ?

For a cheap radio it's not that bad

I don't know if this is the best or worst thing ever

VERY VERY GOOD WORK MAN VERY GOOD WORK 😊😮❤

Awesome video! Great work!

I am about to make an adaptor to use a headset with my Anytone variant.

Excellent video and explanation, well done. What confuses me is that the crt space u which is a cheaper and less capable set contains a menu option to adjust the microphone gain whilst this more advanced set does not.

"PoLoZ oFIArE" 😹

Or are there just too many over modulated radios ?

Can you not just up the gain???

Is this CRT V1 version without VOX or V2 version with VOX? I heard that in the second version they improved the modulation and maybe you don't need to replace the electret microphone?

Interesting and inspiring!!! Thanks!!!