To: | amps@contesting.com |
---|---|
Subject: | Re: [Amps] 3-500z - intermittent filament |
From: | Peter Chadwick <g3rzp@g3rzp.wanadoo.co.uk> |
Reply-to: | g3rzp@g3rzp.wanadoo.co.uk |
Date: | Tue, 6 Feb 2007 18:17:59 +0100 (CET) |
List-post: | <mailto:amps@contesting.com> |
The Mullard data sheet for the 4-250 and 4-400 equivalents (which have the same 5 volt, 14 amp filament as the 3-500Z) specifically call for a certain amount of cooling air over the socket pins. If you ignore this, you get long term reliability problems. It may be worthwhile looking into putting in a small fan (or even 2 if there's room) to cool the pins. 73 Peter G3RZP _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps |
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