[GreenKeys] Plantronics tantalums

[Larry Tighe]

Hi Duncan,

Thanks, no, I was incorrect.  I was thinking uuf.  Appreciate the 
correction.

lar
----- Original Message ----- 
From: "Duncan Brown" <duncanancy at earthlink.net>
To: "Larry Tighe" <larryradio at att.net>
Cc: <GreenKeys at mailman.qth.net>
Sent: Saturday, November 13, 2010 12:56 PM
Subject: Re: [GreenKeys] Plantronics tantalums


> 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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