RP2 Orientation for KRC2

[Brian F. Wruble-2]

I am building the RPC2.  The instructions for installing resistor network
RP2 (47K) says to orient the network with pin 1 (black dot) toward Pin 1 of
the PCB outline.

I cannot find a black dot on the component nor any other indication  of a
preferred end.

Anyone know what I am, missing?  Is the component, in fact, symmetrical so
orientation doesn't matter?

The instruction for RP1 make the point  that it is symmetrical.  The
instruction for RP2 is very specific about requiring the correct
orientation.

Thanks in advance.

73 de Brian W3BW


*Brian F. Wruble, C.F.A.

*70 is the new 40.*
*
Mail: 1107 Key Plaza, PMB 447 Key West, FL 33040-4077
Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD 21930
eFax  305.768.0278
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[K7MDL]

CONTENTS DELETED

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[Brian F. Wruble-2]

There are no distinguishing marks or differences in pin cross-section.  However, my VOM shows that one end, which I have declared to be pin 1, measures 47K ohms to every other pin.  

I probably should have been smart enough to work that out myself.

Thanks for your help!

73 de Brian


--
70 is the new 40.

Brian F. Wruble, C.F.A.
1107 Key Plaza, PMB 447 Key West, FL 33040
Summers: P.O.Box 57, 7400 Augustine Herman Highway, Georgetown, MD 21930    
eFax  305.768.0278   Skype   bwruble  


On Jun 21, 2013, at 7:21 PM, K7MDL <[hidden email]> wrote:

> Looking at the schematic, RP1 is just a bank of resistors.  RP2 however has
> all resistors common with Pin 1.  So one end should be marked or shaped
> differently. Perhaps the shape of the end pin itself, a notch, square vs
> rounded perhaps.  Or use an ohmmeter to find the common pin, 50/50 chance of
> getting it right the first time :-).
>
>
>
> --
> View this message in context: http://elecraft.365791.n2.nabble.com/RP2-Orientation-for-KRC2-tp7575626p7575628.html
> Sent from the Elecraft mailing list archive at Nabble.com.
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[Don Wilhelm-4]

Brian,

If you cannot locate the pin 1 designation on the silkscreen, then look
at the solder pads.  In most cases, the solder pads are rectangular,
except for pin 1 which is usually round.  There are some instances where
most of the solder pads are round, but in that case, pin 1 is
rectangular or square.

On the component, the dot may be any color - usually the same color as
the value marking.  If you hold the R-Pak wih the pins down and the
value designation facing you, pin 1 is normally on the left. The color
of the dot can change from manufacturer to manufacturer, and even from
time to time with the same manufacturer.  Yes, it was black when the
manual was written.

73,
Don W3FPR

On 6/21/2013 6:04 PM, Brian F. Wruble wrote:

> I am building the RPC2.  The instructions for installing resistor network
> RP2 (47K) says to orient the network with pin 1 (black dot) toward Pin 1 of
> the PCB outline.
>
> I cannot find a black dot on the component nor any other indication  of a
> preferred end.
>
> Anyone know what I am, missing?  Is the component, in fact, symmetrical so
> orientation doesn't matter?
>
>

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