[Boatanchors] Tube filiments

[Bob Young]

The PAS preamps were clear as a bell too.

 

Bob Young

KB1OKL

> Message: 2
> Date: Sat, 05 Dec 2009 07:47:25 -0500
> From: "Harry Vaught, KT4AE" <kt4ae at bellsouth.net>
> Subject: Re: [Boatanchors] Tube filaments
> To: boatanchors at mailman.qth.net
> Message-ID: <4B1A565D.2040408 at bellsouth.net>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
> 
> I don't know about any other application but the Dynaco PAS series of 
> preamps from the 60's ran DC on the filaments of the four 12AX7's and 
> they are known to last virtually forever. The filaments are run at a 
> slightly lower voltage which helps.
> 
> Harry, KT4AE
> Maryville, Tennessee
> 
> 
 		 	   		  
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