Somewhere in the vast darkness that exists above my shoulders I seem to
remember seeing something that suggested using A.C. on directly heated
filaments to ensure maximum longevity/emission of a tube. Have I possibly
been mistaken?
At 05:52 PM 9/2/98 -0400, John Nelson wrote:
>
>Message text written by Peter Chadwick
>
>> So using DC on the fils seems best, as advised by GW4FRX. <
>
>More accurately, "as adopted and written up by GW4FRX for amateur use based
>on the experiences of large-scale industrial and professional UK users". I
>didn't originate the technique for small tetrodes: the UK Ministry of
>Defence did.
>
>73 John
>
>
>
>--
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>
>
>
John Wilcox NS1Z
FN44rn
ns1z@agate.net
fon: 207-364-2246
871 Route 120
Rumford, ME 04276-3836
--
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