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Total 3 documents matching your query.

1. Re: [Amps] 8877 blower requirement -airflow switch (score: 1): Author: hamko2ok@optonline.net; Date: Thu, 12 Apr 2007 03:41:26 +0000 (GMT); Henry used Rotron Air Flow Switches, which were made in Woodstock NY. I found one recently model 2A that I used for a Dayton blower in my homebrew 6m 8877 amp. I had to drill a hole in the blower for; /archives//html/Amps/2007-04/msg00085.html (7,070 bytes)
2. Re: [Amps] 8877 blower requirement -airflow switch (score: 1): Author: Steve Thompson <g8gsq@eltac.co.uk>; Date: Thu, 12 Apr 2007 08:03:27 +0100; I've used a ptc thermistor - the sort that changes from low to high resistance abruptly at a set temperature. Run some current through it so it self heats, the airflow cools it so it stays below the; /archives//html/Amps/2007-04/msg00086.html (7,073 bytes)
3. Re: [Amps] 8877 blower requirement -airflow switch (score: 1): Author: Hugh Duff <hduff@cogeco.ca>; Date: Thu, 12 Apr 2007 12:28:43 -0400; I saw a variation of this on the 'net. It uses the filament of a #47 light bulb (with the glass carefully broken and removed) as a temperature sensor. A constant current source heats up the filament; /archives//html/Amps/2007-04/msg00093.html (8,251 bytes)

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