Re: [TCML] Klystron use?

[gary350@xxxxxxxxxxxxx]

Why try to lower the frequency of the Klystron how about increasing the frequency of the TC.

Or better yet, how about frequency modulation where the Klystron is the carrier wave.






-----Original Message-----
>From: Stephen Hiscock <stephenhiscock@xxxxxxxxx>
>Sent: Jun 10, 2009 10:51 PM
>To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
>Subject: Re: [TCML] Klystron use?
>
>I was meaning "Could" in the broadest possible sense..
>Klystrons are generally "Tuned" and calibrated where they are made and 
>usually come with a calibration sheet listing parameters and settings 
>because they don't work very well at other freqs etc..
>But "possibly" someone could design one to work at lower freqs.
>Just like people use high heel shoes as hammers - they work - but its 
>not generally a good idea!
>If operated in conditions they are not designed to operate at - then 
>they will be hopelessly inefficient and would likely not even work at all.
>If you don't have the original calibration sheets etc that came with 
>them, then you might never get them to work properly anyway.
>Also don't forget that you wouldn't want to plug it in without your non 
>ferrous (or non magnetic tools) - peoples fingers have been know to get 
>a little pinched in the big ones when the tool slams into the machine - 
>They have BIG magnetic fields to contain the plasma...
>
>But to explain my "could"
>IF you could obtain two nearly identical Klystrons that operated very 
>near each other in freq - then you have a good starting area.
>No two klystrons are ever the same - its just the nature of the beast.
>And considering the lowest practical frequency of klystrons in current 
>use is about 300MHz - which is 1000 times the freq range of a Tesla coil 
>- then you have a little bit of work ahead of you - but who ever said 
>practical limits aren't meant to be broken... after all we fly around in 
>heavier than air flying machines now....
>besides - you are using them to make sparks, not efficient TV broadcasts 
>on satellites  etc.
>The beauty of Klystrons is their fine Amplitude and Phase control - if 
>you could get them operating close enough to each other so that one was 
>operating at say 300.1Mhz and the other at 300.6MHz - then you could 
>create a beating frequency of 500kHz - which is a good freq for a Small 
>Tesla coil...
>
>I'll leave the rest up to you.....
>
>Hey these aren't reflex Klystrons are they? - Hmmm "Homeland Security" 
>might pay you a visit if they are
>
>Stephen
>
>jimlux wrote:
>> Stephen Hiscock wrote:
>>>
>>> Well that's exactly what Klystrons are used and designed for..
>>> They are designed as amplifiers to drive resonators or transmitters 
>>> etc that allow you to boost a signal while controlling the phase, 
>>> amplitude and frequency etc...
>>> They could be used to drive telsa coils - but are usually designed to 
>>> operate in the hundreds of megahertz or gigahertz range...
>>> but like any thing they could be adapted for other uses....
>>>
>>> Stephen
>>>
>>
>> Well...
>>
>> Klystrons (like most any amplifier) can be either oscillators or 
>> amplifiers, depending on the circuit it's in.
>>
>> I can't imagine Klystron being adapted to work at lower frequencies 
>> than it's design frequency, except maybe if you use the control grid 
>> (if it has one) to turn the beam on and off, and use it as a "real low 
>> frequency" switch.
>>
>> You could also use them as doorstops, which is "another use", after all.
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