[AMPS] Re: [HomeBrew] Fan->make correct and 8877 vs GS35

[John Kirk]

Hi Xu:
In general, the square "muffin" fans will be inadequate for cooling large
external anode tubes.  The type you want to look for are known as "squirrel
cage" because they have inside, a round blade assembly that looks like those
things that caged hamsters and rats exercise on.
Even with them, I don't think power consumption equates real well to air
movement - best to try to dig up the manufacturers specs, or conduct a test.
I think G3SEK's website and books have some material on how to measure air
flow.
Good luck!
John VK2PV


>From: "Xu" <salers@hamal.freemail.ne.jp>
>To: <amps@contesting.com>
>CC: <homebrew@qth.net>
>Subject: [HomeBrew] Fan->make correct and 8877 vs GS35
>Date: Sat, 6 Oct 2001 05:41:18 +0800
>
>
>
>
>  Hi!
>    I have many square fans,some of them  for 220AC,some of them for
>DC12V,could someone  tell me how to cauculate the LPM(litre per minute)
>depend
>  on the current of 220V AC and DC12V?I have a pair 30W AC Fan,can use in a
>  Chinese FU-100F(4CX1000)?I have a Chinese Military 1.6KW HF SSB
>  transmitter(use a FU-100F),but origional fan is too noisy.ps what
>diffrent
>between
>  GS35 and 8877?
>
>       73! de Xu
>
>
>
>----
>Submissions: homebrew@qth.net


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