[Amps] Tube Cooling..

[Carl]

----- Original Message ----- 
From: "Ian White GM3SEK" <gm3sek at ifwtech.co.uk>
To: <amps at contesting.com>
Sent: Saturday, November 27, 2010 11:53 AM
Subject: Re: [Amps] Tube Cooling..


> Carl wrote:
>>
>>----- Original Message ----- From: "Ian White GM3SEK"
>><gm3sek at ifwtech.co.uk>
>>To: <amps at contesting.com>
>>Sent: Saturday, November 27, 2010 3:06 AM
>>Subject: Re: [Amps] Tube Cooling..
>>
>>
>>> Carl wrote:
>>>>
>>>>Top down cooling is the norm in many coaxial cavities at VHF/UHF. My
>>>>Collins 432 MHz military amp with a 2.75KW dissipation tetrode runs
>>>>that way and it was used as an AM linear at 1000W out. A seperate small
>>>>blower cools the input side. Due to the TX/RX relay and the coax going
>>>>to the hardline and antennas I cant run it even close to its 
>>>>capabilities.


>>> Do you really mean "downward through the anode cooler", Carl?
>>
>>Yes
>>
>>Carl
>>KM1H
>
> So the entire anode cavity fills up with hot air...
>
> Collins contributed many excellent ideas to the amplifier gene pool, but
> that certainly wasn't one of them.


Now that is a reply Id expect from those that reply without using much 
mental effort but not from you Ian. Due to the cavity design and the width 
of the anode cooler it didnt leave much choice.

The amp certainly does not show signs of overheating either.

Carl

>
>
> -- 
>
> 73 from Ian GM3SEK
> http://www.ifwtech.co.uk/g3sek
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