Bir sstv yapmayı düşünüyorum. Radyo sinyalini ve ses tonunu algılayacak sensör konusunda yardıma ihtiyacım var.

Translation from Turkish:
I'm thinking of doing an sstv. I need help with the sensor that will detect the radio signal and audio tone.

Moderator: This is an English-only website. Please continue to post in English.

 

Radyo sinyali için bunu yapmayı düşünüyorum

 

You know the famous sound of SSTVs. I need your ideas for a sensor that will detect and react to the SSTV sound.

 

There are many published circuits for decoding SSTV as well as published schemes for displaying the images on a computer. So you can probably do it all with a computer with a sound input. Probably the ARRL has information about it. The decoder circuits I have seen are all quite older technology.
And that "receiver" shown in the you tube picture is not something I would believe works, based on the tube type numbers visible. Even if it is able to receive a signal in the 3.7 MHZ band, it is not likely to provide adequate performance other than in that demonstration video.

 

Also, the yoo toob video did not seem to be about slow scan TV, but rather about a very simple receiver. And the sound was obnoxious so I did not watch it.
First question: Do you already have a receiver able to tune to the SSTV frequencies?
Second question: do you intend to build an SSTV signal decoder? OR would you intend to use a computer to decode and display the picture???

 

Öncelikle aktarımı kolaylaştırmak için RGB 2 bit formatına çevirip kodla sese dönüştüreceğim. Kod resimdeki her pikseli koda dönüştürecek. Bunun için farklı ses tonları kullanacağım. Son olarak ses dosyasını açıp vericiyi ses çıkışına bağlayacağım.

 

MOD NOTE: @lester193: This is an English-only website. Please translate your posts into English before posting them. Do not expect or require others to do that for you. Future non-English posts will be deleted.

 

First of all, to facilitate the transfer, I will convert it to RGB 2-bit format and convert it to sound with code. The code will convert every pixel in the image into code. I will use different tones of voice for this. Finally, I will open the audio file and connect the transmitter to the audio output.




Geri

 

MOD NOTE: @lester193: This is an English-only website. Please translate your posts into English before posting them. Do not expect or require others to do that for you. Future non-English posts will be deleted.

It happened by mistake, I forgot the web page in automatic translation mode

 

First of all, to facilitate the transfer, I will convert it to RGB 2-bit format and convert it to sound with code. The code will convert every pixel in the image into code. I will use different tones of voice for this. Finally, I will open the audio file and connect the transmitter to the audio output.

View attachment 328074


Geri

OK, I am not familiar with any digital part of SSTV, so that will require the participation of others. As I previously mentioned, the youtube video seemed to be only about a very simple tube-type HF receiver, which if you already are a licensed amateur operator you probably own much better equipment already.
Certainly, slow scan TV requires an adequate signal reception that can reject interference.That is not likely to be provided by a 3 tube radio.