K1 15 Meter Capacitors on 2-Band Filter Board

[Joseph M. Durnal]

Before I solder it, I want to make sure I don't have the wrong
capacitors.  The table shows C17 & C19 as 56, but the components I
have are labeled 560J.  Do I have the right capacitors in the 15 meter
bag?

Thanks
Joe
NE3R
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[Mike Short]

An invaluable tool I have found is the Electronics Assistant at:
http://www.electronics2000.co.uk/

Simply put in the code, and it gives you the value. Does resistance,
capacitance, power, etc.

560J is a 56pf 5% capacitor, so you are correct.

Mike
AI4NS

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Joseph M. Durnal
Sent: Thursday, May 03, 2007 6:44 PM
To: [hidden email]
Subject: [Elecraft] K1 15 Meter Capacitors on 2-Band Filter Board

Before I solder it, I want to make sure I don't have the wrong
capacitors.  The table shows C17 & C19 as 56, but the components I
have are labeled 560J.  Do I have the right capacitors in the 15 meter
bag?

Thanks
Joe
NE3R
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[Ron D'Eau Claire-2]

The confusing issue is that many values shown numerically read like "color
codes" - the last digit is a multiplier. IMX that's true of parts when
numbers end in "J". So in this case it's 56 and 0 (zero)zeros following, or
56 pF.

Ron AC7AC

-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Joseph M. Durnal
Sent: Thursday, May 03, 2007 4:44 PM
To: [hidden email]
Subject: [Elecraft] K1 15 Meter Capacitors on 2-Band Filter Board


Before I solder it, I want to make sure I don't have the wrong capacitors.
The table shows C17 & C19 as 56, but the components I have are labeled 560J.
Do I have the right capacitors in the 15 meter bag?

Thanks
Joe
NE3R
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[Mike Morrow-3]

>...The table shows C17 & C19 as 56, but the components I
>have are labeled 560J.  Do I have the right capacitors

There's a very good summary of capacitor marking conventions at:

http://xtronics.com/kits/ccode.htm

There's some interesting non-obvious conventions to this marking system.  Most know that a capacitor marked ABC is equal to AB x 10^C pF.  So yours are 56 x 10^0 = 56 pF.  Similarly, 562 would be 56 x 10^2 = 5600 pF.

So what would 569 be?  Not 56 x 10^9 or 56000000000 pF, as you might think, but actually 56 x 0.1 = 5.6 pF.  When the third digit is 9 the multiplier is 0.1.  When the third digit is 8, the multiplier is 0.01.  You'd be surprised how few know that.

The J on your caps is the code for the value tolerance in percent.  All this is explained on the web site cited above.

73,
Mike / KK5f
(Sorry this topic isn't about the K3...not!)
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[Joseph M. Durnal]

Thanks everyone.  I thought it was right, but until now, the value
listed in the table matched exactly what was printed on the component.
 It has been soldered nicely into place.  I'm just about finished the
filter board!  I think, I sure hope I don't mess up the toroidal
inductors.

73
Joe
NE3R

On 5/4/07, Mike Morrow <[hidden email]> wrote:

> >...The table shows C17 & C19 as 56, but the components I
> >have are labeled 560J.  Do I have the right capacitors
>
> There's a very good summary of capacitor marking conventions at:
>
> http://xtronics.com/kits/ccode.htm
>
> There's some interesting non-obvious conventions to this marking system.  Most know that a capacitor marked ABC is equal to AB x 10^C pF.  So yours are 56 x 10^0 = 56 pF.  Similarly, 562 would be 56 x 10^2 = 5600 pF.
>
> So what would 569 be?  Not 56 x 10^9 or 56000000000 pF, as you might think, but actually 56 x 0.1 = 5.6 pF.  When the third digit is 9 the multiplier is 0.1.  When the third digit is 8, the multiplier is 0.01.  You'd be surprised how few know that.
>
> The J on your caps is the code for the value tolerance in percent.  All this is explained on the web site cited above.
>
> 73,
> Mike / KK5f
> (Sorry this topic isn't about the K3...not!)
>

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