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From: myers@hpfcdj.HP.COM (Bob Myers)
Newsgroups: sci.electronics
Subject: Re: help with choke color code
Message-ID: <17660087@hpfcdj.HP.COM>
Date: 15 Aug 90 19:14:20 GMT
References: <3749@umbc3.UMBC.EDU>
Organization: Hewlett Packard -- Fort Collins, CO
Lines: 25

>green
>yellow
>red
>gold
>gold
>
>On my schemetic diagram it was labeled as 5.4 mH, but on the parts list
>it was 5.4 uH. And I don't know what the first gold color means.
>Thanks in advance.

As you've no doubt noticed, the first three match the good ol' resistor
color code (green = 5, yellow = 4, etc.).  Given that red = 2 in this
code, I'd wager that the value given is in uH - which means it's a 5.4 mH
part (5400 uH = 5.4 mH).  As to the two golds, one is almost certainly
tolerance - probably +/- 5% - while the other is anybody's guess at this
point (Q?).

One other clue - unless it's a little air-core inductor, it's very UNLIKELY
to have a value as low as 5.4 uH.  On the other hand, 5.4 mH is a very
reasonable value for a small iron or ferrite-core coil.


Bob Myers  KC0EW   HP Graphics Tech. Div.|  Opinions expressed here are not
                   Ft. Collins, Colorado |  those of my employer or any other
myers@fc.hp.com                          |  sentient life-form on this planet.