[Amps] Fw: Fan for SB220

[donroden at hiwaay.net]

Quoting Mitch Cox <ww4cox at embarqmail.com>:

> Not to try to be argumentative but this only proves the bare minimum  
> of cooling that exists under the tube deck. If you doubt this, turn  
> the fan off and see how long the solder lasts in any of the pins. If  
> you have a slightly resistive connection with enough air, chances  
> are you would never have known it.


And remember, small CPU fans weren't available to use as "booster"  
fans on the filament pins.  Now,with a little fabrication, each tube  
can have it's own filament pin cooler.

Don W4DNR