Thanks John: do I remember right that you wrote those articles on screen
supplies in K2RIW paralell 4CX250Bs? In the SHORT WAVE MAGAZINE years ago?
73s de Hans
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>Från: John Nelson <John_Nelson@compuserve.com>
>Till: "sm5ki" <sm5ki@algonet.se>, QRO reflector <amps@contesting.com>
>Ämne: Stabilised G2 supplies
>Datum: mån 13 dec 1999 20.21
>
>Message text written by "sm5ki"
>
>>I remember many old tube transceivers that did not have any stabilized g2
>voltage in the final and it worked fine. My old TX44XB for example. It sure
>sounds fine and was once good enough OK for Swedish State Dept using many
>of them as TR44s. This was a R4B+T4XB in the same case.<
>
>As a consequence of their internal geometry, tubes such as the small 4CX
>family tend to source lots of screen current as well as sink it. In this
>they are unlike most "ordinary" tetrodes, and benefit much more from
>stabilised G2 supplies capable of sinking and sourcing current.
>
>John Nelson
>GW4FRX
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