Vic Roberts is the guy for RF Discharge Question

Discussion in 'Lighting' started by Jeff Engel, Oct 13, 2012.

  1. Jeff Engel

    Jeff Engel Guest

    On 8/19/2012 7:15 AM, Ian Mackay wrote:
    > Hello lighting folks - wonder if any one here can help?
    > I'm working on an RF discharge tube project (as a spectroscopist, not as a
    > lighting engineer) using gas fills that may react with a 'conventional' tube
    > with internal electrodes .
    > My current (working) setup is a 100W HAM HF radio transmitter driving an ATU
    > and air-cored tuned transformer then on to external electrodes - and
    > there-in lies my question.
    > After studying a lot of references, I am unable to find any 'pros and cons'
    > type of comparisons of common external electrode configurations. Some
    > designs use external collars, some coils(s) and some full length plates.
    > Driving frequencies vary from , say, 3Mhz to 150Mhz (I suspect that this may
    > be driven as much by local radio spectrum allocations rather than discharge
    > efficiency)
    > Assuming that the RF wavelengths used to drive the tube are much greater
    > than the sizes of / distance between the electrodes, are their any rules of
    > thumb / references that provide guidance on an optimum electrode
    > configuration?
    > MTIA
    > Ian Mackay
    Jeff Engel, Oct 13, 2012
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