Bob Marston wrote:
>
>Ok Gang
>
>Here is a practical question. I'm building an amp and have the tube,
>socket, chimney and blower. I'm interested in testing the the airflow of
>the system and have seen a couple of write ups on the test using said
>components along with a cardboard box and manometer. I can obtain a
>cardboard box easily enough but have no idea of where to get a manometer.
>It needs to measure up to at least 2 inches of water and have a resolution
>of .1 inches. I'm all ears or eyes as the case may be.
>
Thin transparent plastic tubing, taped to a ruler in two parallel lines
with a loop at the bottom. A few drops of colored ink, a tiny trace of
detergent.
Just add water.
73 from Ian G3SEK Editor, 'The VHF/UHF DX Book'
'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.demon.co.uk/g3sek
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