[Hallicrafters] Sylvania 0A2


mac w7qho at aol.com
Thu Feb 9 19:07:45 EST 2012


Makes the firing more reliable, particularly in situations where the  
initial voltage level provided by the circuit is marginal for ignition.

Dennis D.  W7QHO
Glendale, CA

************

On Feb 9, 2012, at 2:37 PM, L L bahr wrote:

>
> That is my understanding too.
>
> Lee, w0vt
>
> ----- Original Message -----
> From: "David C. Hallam" <dhallam at knology.net>
> To: hallicrafters at mailman.qth.net
> Sent: Thursday, February 9, 2012 4:11:13 PM
> Subject: Re: [Hallicrafters] Sylvania 0A2
>
> I certainly may be mistaken, but I thought all of these voltage
> regulator tubes were slightly radioactive using the ionizing radiation
> to initiate the discharge.
>
> David
> KW4DH
>
> On 2/9/2012 5:03 PM, James Liles wrote:
>> Anybody know why some Sylvania 0A2’s use a radioactive component in  
>> the design and do others?
>>
>> Kindest regards Jim K9AXN
>>
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