Transmitters without transistors or Tubes

[jacquesl]

Hi,

Do anyone of you know if a you can build a transmitter operating at +- 88Mhz or higher, like in the Ghz range
And it must all work without any transistors or tubes, must only work with coils,caps, resistors,crystals or slow stable oscillators like the 555 timer IC and any other new homemade switching technology hidden in somebody’s electronic master’s closet are welcome

I want to discover something cool like the Klystron tube, it can operate @ 3Ghz
And normal tubes probably not, it’s like in the Hz – KHz range

This is a unique device for me “The Klystron tube” weird but wicked

So what de Advantage/Disadvantage of going to High Frequency like higher than 50GHz to 500Ghz of even to the THz Range


check out a picture of a MJ2955 Transistor slashed open

 

[I_Forgot]

I don't understand. A 555 timer IC contains many transistors. What do you want to do with the transmitter?

There are currently very few devices known to man that can oscillate at Terahertz frequencies.

Passive devices may resonate at some high frequency, but they can't "transmit" without some power input (i.e. active circuits). The power input could be another high frequency transmitter, and if the device contains a nonlinear junction it may cause a change in the frequency that can be detected remotely, but that is sort of stretching the definition of a transmitter.

I_F

 

[jacquesl]

I made a double post here in two sections, I wasn’t sure where to drop my Thread, because this site is mostly all about diyAudio


http://www.diyaudio.com/forums/showthread.php?s=&threadid=90980

 

[Onra]

400 THz oscillator

Hi,
a oscillator for the 300 to 400Thz range is easy to build:
use a light bulb (without other electronic devices) or a laser pointer

Regards
Onra

 

[jacquesl]

Onra, I understand your viewpoint, it’s interesting to me, your right it will probably make a good oscillator in the visible spectrum between 400 nm and 700nm and that’s between Ultraviolet and Infra-red.

But how can you transformer that oscillation to a electric signal ?

 

[phase_accurate]

But how can you transformer that oscillation to a electric signal ?

Why would you want to do so ?

Regards

Charles