[Amps] AL-1500 pi-network capabilities

[R.Measures]

On Sep 1, 2004, at 1:59 PM, Rob Atkinson, K5UJ wrote:

> Hi Will,
>
> thanks very much for these observations.  I apologize for not giving 
> more information.  I naively thought the photos would be enough.  
> interesting what you said about the low frequency coil, as I have 
> heard that having it wound on a solid cylinder form may be a problem 
> (heat buildup?).
> I wish I had one of the original h.v. transformers.  I would be glad 
> to send it to you but I guess the shop kept it.  your comments about 
> coil tube thickness and plating very interesting also.
> Why don't these amp manufacturers just bite the bullet and make us an 
> amp with the needed monster coils?

Rob -- The TL-922 is such an amplifier.  Larger diameter conductors are 
progressively used as freq increases.  It is my opinion that whoever 
designed the 922's tank had a good working knowledge of skin effect, 
and that whoever designed the AL-1500's did not. .  Not only are the 
922's conductors sized to compensate for skin effect, cooling air is 
sucked through the tank in order to keep the inductances cool.
- cheerz

>
>
Richard L. Measures, AG6K, 805.386.3734.  www.somis.org