Re: OT 0805 resistor noise


Walter Harley wrote:

> "Pooh Bear" <rabbitsfriendsandrelations@xxxxxxxxxxx> wrote in message
> news:431D09C2.4CCD9212@xxxxxxxxxxxxxx
> > [...]
> > Then again I'm now moving back away from SMD for the most part.
>
> How come?

I thought that might raise a few eyebrows !

Several reasons actually. Here's a few.

First off - it's clear that SMT is great for large scale high quantity
manufacturing. It involves quite a high investment in tooling, jigs etc
for a product made that way to make sense though and the big economies
only really result when a line can be set up to run full tilt for a
while.

We tend to make products in rather more modest quantities - hundreds per
run rather than thousands. That simply doesn't make sense for SMT.

Also, many key components we use are only available in 'conventional'
technology anyway so there's quite a large amount of leaded components in
any event.

Bench serviceabilty is greater for the product using non SMT. We have
many customers ( or their techs ) who'll open up a product and fix it
themselves once it's out of warranty. They're unlikely to be able to do
that with SMT. We gain from offering a service friendly product. In
comparison other brands at the entry level in our sector are frankly now
making products that make more sense to throw away than repair.

I'm also looking ahead to lead-free. That's going to make pcb processing
so much more critical and especially so for SMT. We don't have the size
of runs to muck around playing with temperature profiles to make the
soldering reliable.

Graham


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Relevant Pages

  • Re: OT 0805 resistor noise
    ... > First off - it's clear that SMT is great for large scale high quantity ... That simply doesn't make sense for SMT. ... many key components we use are only available in 'conventional' ... > Bench serviceabilty is greater for the product using non SMT. ...
    (sci.electronics.design)
  • Re: OT 0805 resistor noise
    ... First off - it's clear that SMT is great for large scale high quantity manufacturing. ... It's actually turned out to be slightly faster than through-hole (because one doesn't have to bend and trim leads or flip the board over to solder), but I will say that it's taken some training to get good soldering quality; ...
    (sci.electronics.design)
  • Re: OT 0805 resistor noise
    ... > First off - it's clear that SMT is great for large scale high quantity ... > manufacturing. ... That simply doesn't make sense for SMT. ... the board over to solder), but I will say that it's taken some training to ...
    (sci.electronics.design)
  • Re: OT 0805 resistor noise
    ... That simply doesn't make sense for SMT. ... > Bench serviceabilty is greater for the product using non SMT. ... > many customers (or their techs) who'll open up a product and fix it ... > of runs to muck around playing with temperature profiles to make the ...
    (sci.electronics.design)