>Richard wrote:
>>>I need to know how to determine if the following fans will be adequate
>>>for an 4cx1000/1500 amp. While I can find the cfm specs, I cannot
>>>find the back pressure specs.
>>
>>Ordinary fans do not create enough air pressure to cool external anode
>>tubes. A centrifugal blower makes more pressure. I like to mount the
>>tube/socket in a cardboard box and measure air pressure with a
>>manometer.
>>
>>
>Agreed about the cardboard box mock-up, just to see if the blower is big
>enough.
>
>Broadening the answer, it is better to measure the cfm directly by
>letting the exhaust air blow up a thin plastic bag, and timing how long
>it takes (as recommended here by K6GT).
? Eimac provides a number of pressure vs cfm points in their spec sheets.
>...
- R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K,
www.vcnet.com/measures.
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