[Premium-Rx] Harris 110A 1 kwatt rf Amplifier cooling

[Berndt Josef Wulf]

G'day Blair,

People have tried that and ended up with the driver tubes overheating and 
failing. Its not just the amount of air, but also the way it flows through the 
chambers.

Like you, I keep my equipment as original as possible and after doing a lot of 
research decided not to attempt any of the elaborate modifications and instead 
use a piece of foam to reduce the noise of my "Air Raid Siren".

73, Berndt
VK5ABN

On 15/02/11 Blair Batty wrote:
> Thank you, everyone, for your excellent suggestions. I'd like to
> keep the amplifier as original as possible, and I don't want hoses
> or muffler boxes projecting out the front of the amplifier; so I will
> either:
> 
> 1) do nothing, or
> 
> 2) ...disconnect, but leave in place, the original fan, connect a box to
> the exhaust port on the back of the amplifier. Install some large, quieter
> fans in that box, to ~suck~ the heat out of the amplifier.  I can get the
> same cfm, but it could change the airflow inside the amplifier.
> 
> Comments anyone?
> 
> Sincerely
> /blair