Ian Roberts wrote:
>
>I think the point here is that electrons bombarding the anode, cause
>x-ray emission as a secondary effect.
>Since I intend to operate these tubes at full output, I shall be looking
>for lead-lined boxes from now on!
>
X-ray emission depends on the anode voltage (determines photon energy)
and anode current (determines intensity).
The original question has timed-out here, but ISTR it was about 4CX250s.
At the typical 2kV anode voltage the x-ray emission is trivial, and the
very soft (low-energy) x-rays are stopped by the normal metal RF
shielding.
At higher voltages, x-rays can be a significant problem... but not for
amps of the 1.5kW class.
73 from Ian G3SEK Editor, 'The VHF/UHF DX Book'
'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.demon.co.uk/g3sek
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