[GreenKeys] Plantronics tantalums

[Duncan Brown]

Larry,

You are correct; "226" = 22 mfd. [I think you meant "mfd", not "uuf" which is an older term for "pf"]

"15K" is 15VDC maximum working voltage,and "K" = +/- 10% tolerance on the capacitance value.

Have fun,

Duncan
K2OEQ



-----Original Message-----
>From: Larry Tighe <larryradio at att.net>
>Sent: Nov 13, 2010 12:46 PM
>To: greenkeys at mailman.qth.net
>Subject: Re: [GreenKeys] Plantronics tantalums
>
>
>Subject: Re: [GreenKeys] Plantronics tantalums
>
>
>> Dipped tantalum capacitors from the late 1970s and early 1980s have a
>> particularly poor reputation for reliability, and now fail frequently.
>========================================================
>
>I'm a bit confused on reading the value of the two failed tantalums. 
>According to wikipedia,
>"In some cases (often when µF is not printed), the value (in pF) is encoded 
>with three numbers; the first two digits being the significant figures, with 
>the third being the multiplier (i.e. number of zeros)."
>
>My "guess" is that the tantalum marked 226, therefore, is 22 uuf.  The 15K 
>below the 226, I presume, is 15 working volts.  Any opinions on this would 
>be appreciated so I can order up replacements.
>
>Thanks to all for the discussion on tantalums.
>
>lar
>K2JIA 
>
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