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Old 25th November 2006, 06:21 AM   #1
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Default Transmitters without transistors or Tubes

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 somebodyís electronic masterís closet are welcome

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

This is a unique device for me ďThe Klystron tubeĒ 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
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Old 25th November 2006, 05:58 PM   #2
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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
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Old 25th November 2006, 07:17 PM   #3
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I made a double post here in two sections, I wasnít sure where to drop my Thread, because this site is mostly all about diyAudio


Transmitters without transistors or Tubes
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Old 28th November 2006, 02:00 PM   #4
Onra is offline Onra  Germany
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Default 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
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Old 1st December 2006, 11:14 AM   #5
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Onra, I understand your viewpoint, itís interesting to me, your right it will probably make a good oscillator in the visible spectrum between 400 nm and 700nm and thatís between Ultraviolet and Infra-red.

But how can you transformer that oscillation to a electric signal ?
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Old 7th December 2006, 02:47 PM   #6
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Quote:
But how can you transformer that oscillation to a electric signal ?
Why would you want to do so ?

Regards

Charles
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