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Loktal tubes
BrendaAnnD
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#1

10-15-2013, 02:01 AM
I've a question. It has probably been answered before, but here goes:

Why do loctal tubes have designations like 7B7 or 14B7, when in actuality the filament voltages are 6.3 and 12.6, respectively? Were they running out of letter designations for 6 and 12 volt tubes by that time? I note that ones like 35Y4 use the standard filament voltages.
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Messages In This Thread
Loktal tubes - by BrendaAnnD - 10-15-2013, 02:01 AM
RE: Loktal tubes - by Mondial - 10-15-2013, 08:17 AM
RE: Loktal tubes - by BrendaAnnD - 10-15-2013, 03:14 PM
RE: Loktal tubes - by codefox1 - 10-15-2013, 03:53 PM
RE: Loktal tubes - by Arran - 10-15-2013, 11:16 PM



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  1. The PHILCO Phorum
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