[Hallicrafters] [Boatanchors] 12DQ6 tube question

[mac]

Jim,

Yes, generally correct.  However, if I'm reading Sibley (Tube Lore)  
correctly the (12DQ6) "A" version has a bit higher plate dissipation  
rating than the non-A (18W vs. 15W). Substitution should be FB,  
though.  Looks like one could also substitute 12DQ6Bs and 12GW6s which  
had button type bases.

Dennis D. W7QHO
Glendale, CA

************
On Dec 4, 2010, at 2:23 PM, Jim Wiley wrote:

> Greg, as a general rule tubes intended for operation in TV receivers
> that have an "A" suffix were identical with the "standard" version
> except for having a controlled heater warm up time for series string
> operation.  Like all such "general" rules, not always true, but true
> often enough that you are unlikely to cause chaos by assuming it to be
> true.
>
>
> - Jim, KL7CC
>
>
>
> Greg Mijal wrote:
>> Hi:
>> Are there any significant differences between the 12DQ6 and the  
>> 12DQ6A (B) variants?I need to put new ones in the PA of my  
>> Hallicrafters SR 160.
>> TNX
>> and Season Greetings!
>> Greg
>> WA7LYO
>> Kinston NC
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