Re: Elecraft ECO 00507 K3 DSP PCB BOM Changes to Make Production Rev B1 (Attachments)

[wayne burdick]

Brian, just a note that crystal spacers are *not* needed on the RF
board, synth, REF oscillator, and crystal filter modules. I shrink the
exposed pad area in all my designs on the top side of the board so the
crystal can't short to the pad. Solder mask is an excellent insulator.

tnx
W

On Nov 20, 2007, at 2:33 PM, Brian wrote:

> ECO Number:          00507       K3 DSP PCB BOM Changes to Make
> Production Rev B1
> Date submitted:      11/20/2007
> Originator:          Brian Broggie
>
> Attention:           Wayne B., Lyle J., Bob F., Eric S., Group7,
> Synergetics
>
> EPN's Affected:      E850233     K3 DSP PCB BOM
>
> Applicability:       Applicable immediately to all assemblies for
> E100234 DSP PCB rev B.
>
> Special instructions:
>
>                     Please make the following changes to BOM E850233:
>
>
>                     Add E700155 "Mylar Insulator for Xtals" (add ref
> HDWR)
>                      set Qty to 1.  Vendor is DigiKey Part #
> 492-1039-ND.
>
>
> Reason for change:   Prevents Y1 from shorting leads to ground.
>
>
> <E850233-B1 K3 DSP BOM.xls>Assembly: E850233 K3 DSP PCB Assembly
> This Document Rev: D
> Last Revised: 11/20/2007
> Revised By: B. Broggie
>
>
> Connectors P31 and P32 are installed on the component (top) side of
> the PCB.
>
> Connectors J1, J52, J53, and J54 are installed on the component (top)
> side of the PCB.
>
> Connectors J50 and J51 are installed on the solder bottom side of the
> PCB.  These
> are the *only* parts installed on the bottom side of the PCB.
>
> Connectors P57 and P59 are not installed.
>
> The holes for P57 must be kept free of solder!
>
> Pins 17, 18, 19 and 20 of J51 must be trimmed FLUSH to the PCB before
> soldering, and
> inspected post-solder to ensure proper wicking of solder.  There mus
> be no more than
> 0.005" of pin extending past the surface of the PC board.  This is to
> ensure there is
> no shorting between pins of the VFO-B encoder PCB on the FP board and
> pins of J51 on
> the DSP board.
>
>
>  1  3  5  7  9 11 13 15
>
>  o  o  o  o  o  o  o  o
> ------------------------
>  o  o  o  o  o  o  o  o
>
>  2  4  6  8 10 12 14 16
>
>
>
>
> Y1 requires a grounding wire from the case to the ground pad just
> above it.
>
> There are no removed male pins (polarizing) or insterted female pin
> blocks (polarizing)
> on this PCB assembly.
>
> Ensure the J1 headphone jack is mounted square to the surface of the
> pc board.
>
>
>
> *******************************
> New this rev:
>
>      Insert a nylon insulator under Y1 prior to inserting it onto the
> PCB.
>
> *******************************
>
>
>
>
> ==== End ====
>

---

http://www.elecraft.com

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[Ed Muns, W0YK]

Wrong reflector, Wayne.  I don't think any of us are expected to understand
this, but it's nice to know engineering and production are working well
together at getting K3s out the door.  ;>)

73,
Ed - W0YK

> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]] On Behalf Of wayne burdick
> Sent: Tuesday, 20 November, 2007 14:41
> To: Eric Swartz; Elecraft Reflector; Brian Broggie; Gary Surrency
> Subject: [Elecraft] Re: Elecraft ECO 00507 K3 DSP PCB BOM
> Changes to MakeProduction Rev B1 (Attachments)
>
> Brian, just a note that crystal spacers are *not* needed on
> the RF board, synth, REF oscillator, and crystal filter
> modules. I shrink the exposed pad area in all my designs on
> the top side of the board so the crystal can't short to the
> pad. Solder mask is an excellent insulator.
>
> tnx
> W
>
> On Nov 20, 2007, at 2:33 PM, Brian wrote:
>
> > ECO Number:          00507       K3 DSP PCB BOM Changes to Make
> > Production Rev B1
> > Date submitted:      11/20/2007
> > Originator:          Brian Broggie
> >
> > Attention:           Wayne B., Lyle J., Bob F., Eric S., Group7,
> > Synergetics
> >
> > EPN's Affected:      E850233     K3 DSP PCB BOM
> >
> > Applicability:       Applicable immediately to all assemblies for
> > E100234 DSP PCB rev B.
> >
> > Special instructions:
> >
> >                     Please make the following changes to
> BOM E850233:
> >
> >
> >                     Add E700155 "Mylar Insulator for Xtals" (add ref
> > HDWR)
> >                      set Qty to 1.  Vendor is DigiKey Part #
> > 492-1039-ND.
> >
> >
> > Reason for change:   Prevents Y1 from shorting leads to ground.
> >
> >
> > <E850233-B1 K3 DSP BOM.xls>Assembly: E850233 K3 DSP PCB
> Assembly This
> > Document Rev: D
> > Last Revised: 11/20/2007
> > Revised By: B. Broggie
> >
> >
> > Connectors P31 and P32 are installed on the component (top) side of
> > the PCB.
> >
> > Connectors J1, J52, J53, and J54 are installed on the
> component (top)
> > side of the PCB.
> >
> > Connectors J50 and J51 are installed on the solder bottom
> side of the
> > PCB.  These are the *only* parts installed on the bottom
> side of the
> > PCB.
> >
> > Connectors P57 and P59 are not installed.
> >
> > The holes for P57 must be kept free of solder!
> >
> > Pins 17, 18, 19 and 20 of J51 must be trimmed FLUSH to the
> PCB before
> > soldering, and inspected post-solder to ensure proper wicking of
> > solder.  There mus be no more than 0.005" of pin extending past the
> > surface of the PC board.  This is to ensure there is no shorting
> > between pins of the VFO-B encoder PCB on the FP board and
> pins of J51
> > on the DSP board.
> >
> >
> >  1  3  5  7  9 11 13 15
> >
> >  o  o  o  o  o  o  o  o
> > ------------------------
> >  o  o  o  o  o  o  o  o
> >
> >  2  4  6  8 10 12 14 16
> >
> >
> >
> >
> > Y1 requires a grounding wire from the case to the ground pad just
> > above it.
> >
> > There are no removed male pins (polarizing) or insterted female pin
> > blocks (polarizing) on this PCB assembly.
> >
> > Ensure the J1 headphone jack is mounted square to the
> surface of the
> > pc board.
> >
> >
> >
> > *******************************
> > New this rev:
> >
> >      Insert a nylon insulator under Y1 prior to inserting
> it onto the
> > PCB.
> >
> > *******************************
> >
> >
> >
> >
> > ==== End ====
> >
>
> ---
>
> http://www.elecraft.com
>
> _______________________________________________
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> Elecraft web page: http://www.elecraft.com
>

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[dj7mgq]

But it does make one wonder who or what are Group7 and Synergetics and
do I need to modify my DSP board???

ONLY JOKING....



vy 73 de toby
--
DD5FZ (ex 4n6fz, dj7mgq, dg5mgq, dd5fz)
K2/10  #885
K2/100 #3248
K3/100 #67 (first 12V test passed, waiting for a missing part)
DOK C12, BCC, DL-QRP-AG


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[wayne burdick]

Sorry for the bandwidth -- this was not intended to be posted to the
reflector.

Wayne
N6KR

---

http://www.elecraft.com

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