[Elecraft] K2 RF board part C72 Identity - found!

[nz7c at cox.net]

Part found and identifed - thanks to the many who responded! Now that I found it I feel a little foolish, buy it's so nice to know that people are willing to help regardless of the question. Thanks all!!
73/Tim NZ7C
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From: "W3FPR - Don Wilhelm" <w3fpr at earthlink.net>
Date: 2005/01/23 Sun AM 08:28:54 EST
To: <johnlon at sbcglobal.net>
CC: Elec-Reflector <elecraft at mailman.qth.net>
Subject: Re: [Elecraft] K2 RF board part C72 Identity

John, Tim and all,

Usual capacitor markings are not really hard to interpret - they are just 
like resitor color codes but using numbers instead of colors.  They use 3 
digits - 2 significant digits followed by a multiplier.  The multiplier 
tells us how many zeros to add - so 470 would be a 47 pf capacitor, 471 is 
470 pf, 472 is 4700 pf, etc.

The exception is that values in the range 0 to 9.9 pf are usually marked 
with their actual value (and usually followed by a letter) - and values from 
10 pf to 99 pf can be marked with just their value (but it will have only 2 
digits, not 3).  If the marking contains only one or two numbers, that 
number is the capacitor value, and if it contains a decimal point, that 
marking is most certainly the value.

Yes, there are several ways that capacitors can be marked, just look at the 
component data section of an ARRL handbook to become familiar with the 
variety, but for the most current production capacitors, the marking rules 
indicated above will hold true.

73,
Don W3FPR

----- Original Message ----- 
From: "John R. Lonigro" <johnlon at sbcglobal.net>
Cc: "Elec-Reflector" <elecraft at mailman.qth.net>
Sent: Sunday, January 23, 2005 7:29 AM
Subject: Re: [Elecraft] K2 RF board part C72 Identity


> Tim:
>
> I am using my Rev E manual for reference.  It might be slightly different 
> in yours.  There is a 2.7 pf capacitor (C22) listed and I'm wondering if 
> you have identified that when you did your inventory.  I suspect the blue 
> 2.7C cap you found might be that one.  Also, there is a 27 pf capacitor 
> (C198) which in my manual is erroneously described in the parts list as 
> "27" or "271", but I believe it should have said "27" or "270".  The 
> really confusing aspect of it all is a 270 pfd capacitor should be 
> labelled "271", so you have the case where something marked "270" isn't a 
> 270 pfd capacitor.  I found all of this while doing inventory and made 
> sure I marked them unambiguously so I wouldn't get them mixed up when it 
> was time to install them.
>
> Good luck and 73's,
>
> John AA0VE
>
>
> Tim Logan wrote:
>
>> I'm having trouble locating this part. Manual says it should be labeled 
>> 271. I have a small blue cap that is labeled 2.7C. Could this be C72? 
>> Thanks for any help.
>> 73/Tim NZ7C
>>
>>
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