>
>-
>Hello there,
>-
>This months issue of QST has a product review of the new Ten
>Tec 416 Titan II HF Amplifier.
>-
>Ten Tec has chosen to use the Svetlana 4CX1600B tube,
>which "should last many, many years and-if there's a problem
>Svetlana warranties the tube based on its time in service."
>-
>The magic words are the statement which follows in the next
>few lines.... "According to Scott Robbins, W4PA, of Ten Tec,
>Svetlana claims to have a method for determining length of
>service by analyzing the tube itself, but this warranty has
>yet to be exercised."
>-
>In large lamps and tubes I deal with, suppliers are providing
>products which have small series heater lead time lapse
>indicators and we know about thermal paint...
>-
>What other magic length of service indicator can one install
>inside the actual tube..? Maybe this one got by me...
>
// Perhaps they measure the amount of barium transferred to the contol
grid by evaporation from the cathode?
>cheers
>skipp
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>
- R. L. Measures, 805.386.3734,AG6K, www.vcnet.com/measures.
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