[ARC5] Loctals and Hickok 6000A

[Bill Cromwell]

Hi,

the 12series tubes operated in automotive systems too. Today we get all 
anal about 12 volt devices being 12.0000000000000 volts because of all 
those cool digits on out DVMs. Those systems run to 15 volts (or more) 
and the tube heaters work just fine there. Down to 8 or 9 volts too. 
It's similar with 6series tubes.

The 7 and 14 series part numbers were intended to indicate the loctal 
series tubes just by inspection of the schematic or block diagrams or 
the parts list.

73,

Bill  KU8H

On 10/13/19 1:39 PM, D C _Mac_ Macdonald wrote:
> My 1970 RCA tube manual states 12.6.  However, the Loctal tubes were 
> generally used in auto or maybe aircraft radios and were apparently made 
> to withstand the nominal 14 Volt charging voltages in those usages.  
> It's sort of akin to the 130 Volt bulbs made to better withstand the 
> frequent 125 VAC that shows up in residential power.
> 
> 73 de Mac, K2GKK/5​
> Since 30 Nov 1953​
> Oklahoma City, OK​
> USAF, Retired ('61-'81)​
> FAA, Retired ('94-'10)
> 
> ------------------------------------------------------------------------
> *From:* arc5-bounces at mailman.qth.net <arc5-bounces at mailman.qth.net> on 
> behalf of Waldo Magnuson via ARC5 <arc5 at mailman.qth.net>
> *Sent:* Sunday, October 13, 2019 11:58
> *To:* arc5 at mailman.qth.net <arc5 at mailman.qth.net>
> *Subject:* [ARC5] Loctals and Hickok 6000A
>     Well I’m just going to have to be be more deliberate and careful 
> when I do things. My Hickok 6000A tube tester DOES have a Loctal socket. 
> So all my thrashing about went away and all the Loctal tubes tested 
> okay. Forget all my previous inputs.
>     But I do have a question, are the 14A7 etc, tubes 14 volt filaments 
> or 12.6 volts?
> Skip W7WGM
> 
> 
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-- 
bark less - wag more