[Amps] filament transformers

[Bob Maser]

Why not call  Jim, W4LNI here in Tampa, FL.  He will make you a custom 
designed transformer to meet your requirements.  His number is 813.876.5531. 
He has built several transformers for me and his quality is excellent and 
his prices are good.

Bob  W6TR
----- Original Message ----- 
From: "Paul Decker" <kg7hf at comcast.net>
To: <amps at contesting.com>
Sent: Friday, May 15, 2009 4:40 PM
Subject: [Amps] filament transformers


>
>
> Hello builders,
>
>
>
> My amp continues to grow. I'm trying to pick out a filament transformer, 
> such and easy task.
>
>
>
> The amp is based on a 3cx800a7 which requires 13.5V +- 0.6V at 1.5A. I was 
> thinking that a 14V transformer would work great. Ideally, I would like to 
> build the amp with the option to eventually be expanded to a pair of 
> 3cx800's rather than the single. This would mean I need 3.0A
>
>
>
> On digikey , they have a 14V 3.0A transformer
>
> http ://search. digikey .com/scripts/ DkSearch / dksus . dll 
> ?Detail&name=237-1279-ND
>
>
>
> and a 14V 4.0A transformer
>
> http ://search. digikey .com/scripts/ DkSearch / dksus . dll 
> ?Detail&name=237-1094-ND
>
>
>
>
>
> So my questions are: Is it acceptable to use the higher current rating in 
> the single tube version of the amp? Would current inrush be an issue? Is 
> the 3A version enough, should I get the 4A version or something even 
> larger? Or, is there something else I should be thinking about using?
>
>
>
> thanks,
>
> Paul, kg7hf
>
>
>
>
>
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