MOTM

Started on assembly of one of my 310's last evening (great job of
step-by-step assembly instructions as always, Paul).  So here is my stupid
question: Why are some axial units (e.g., caps, diodes) on a different
hole spacing than other axial units (e.g., resistors, ferrite beads)?

It is nice to have a 'lead bender' to space the resistors and beads, but
sortof a pain to hand bend the caps and diodes.  It would be nice to be
able to use the same lead spacing (.4) for the axial caps and diodes.  I'm
not faulting Paul here as this seems to be a 'universal' pcb layout
situation (from my limited experience).

Is this just 'the way it has always been' (one of those useless excuses
phrases)?

Ok, let me know how stupid this question is, Jeff

> Started on assembly of one of my 310's last evening (great job of
> step-by-step assembly instructions as always, Paul).  So here is my stupid
> question: Why are some axial units (e.g., caps, diodes) on a different
> hole spacing than other axial units (e.g., resistors, ferrite beads)?
>

a) errr.....(cough cough) diodes ARE on 0.400 lead spaces, same as resistors

b) the caps are on .300 lead spaces because that is the same as the width of the DIP IC packages.
Also, the physical body size of the caps is small, and you want the bends closer to the body.

Also, if you use a standard Mouser-type lead bender tool, there is a "trick" that *perfectly*
bend the leads to .300 centers. Ponder and get back to the list for the solution.

Paul S.

Ha! I know that one:>  Place the bead of the cap in the small hole provided 
to hang the tool up and bend the leads....

dave

At 08:16 AM 2/26/02 -0600, Paul Schreiber wrote:

>Also, if you use a standard Mouser-type lead bender tool, there is a 
>"trick" that *perfectly*
>bend the leads to .300 centers. Ponder and get back to the list for the 
>solution.

> 
> a) errr.....(cough cough) diodes ARE on 0.400 lead spaces, same as resistors
Sorry, Paul, yes for your pcbs but not on some others that I've worked
with.

> 
> b) the caps are on .300 lead spaces because that is the same as the width of the DIP IC packages.
> Also, the physical body size of the caps is small, and you want the bends closer to the body.
> 
Ok, I learned something today!

> Also, if you use a standard Mouser-type lead bender tool, there is a "trick" that *perfectly*
> bend the leads to .300 centers. Ponder and get back to the list for the solution.
> 
>Dave Hylander:
>Ha! I know that one:>  Place the bead of the cap in the small hole
>provided 
>to hang the tool up and bend the leads....

Oh, yes. I didn't think 'creatively' enough, thanks Dave.

Thanks guys, Jeff

Use the bender guide sideways?

Thomas White


>From: "Paul Schreiber" <synth1@...>
>To: <motm@yahoogroups.com>, "Jeffrey Pontius" <jpont@...>
>Subject: Re: [motm] stupid pcb layout question of the week: axial caps & 
>diodes
>Date: Tue, 26 Feb 2002 08:16:02 -0600
>
>
> > Started on assembly of one of my 310's last evening (great job of
> > step-by-step assembly instructions as always, Paul).  So here is my 
>stupid
> > question: Why are some axial units (e.g., caps, diodes) on a different
> > hole spacing than other axial units (e.g., resistors, ferrite beads)?
> >
>
>a) errr.....(cough cough) diodes ARE on 0.400 lead spaces, same as 
>resistors
>
>b) the caps are on .300 lead spaces because that is the same as the width 
>of the DIP IC packages.
>Also, the physical body size of the caps is small, and you want the bends 
>closer to the body.
>
>Also, if you use a standard Mouser-type lead bender tool, there is a 
>"trick" that *perfectly*
>bend the leads to .300 centers. Ponder and get back to the list for the 
>solution.
>
>Paul S.
>
>




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