On 8/16/2010 2:21 PM, Colin Lamb wrote:
> "So the caution should be - yes, air is good. Very good. But if you are
> heating the anode to a temp beyond it's specification, the degragation in
> the condition of the anode is going to be happening no matter how much air is
> blowing over the envelope."
>
> It might be useful to consider a couple of different tubes.
>
> First, consider the 811A. If the tube element gets red for very long, you
> will have a hole in the plate.
I thought red was good/normal and white was bad.
73
Roger (K8RI)
> You could blow lots of air over this tube and it will still be limited in
> plate dissipation.
>
> Now, consider the 3-500Z tube. It will run with lots of color. Blowing lots
> of air around this tube is much more meaningful as the plate is not likely
> going to be the cause of failure.
>
> I consider the benefit or running lots of air simply means that your tube
> will be able to dissipate the rated capacity. If you do not have lots of
> air, dissipation will be less than rated.
>
> 73, Colin K7FM
>
> _______________________________________________
> Amps mailing list
> Amps@contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|