[R-390] Sherwood

[Bob Young]

That is too bad he D/Ced them one was definitely on my future buy list.

Bob Young
KB1OKL

> From: lester at veenstras.com
> To: ham at kb8tq.com; r-390 at mailman.qth.net
> Date: Sun, 20 Oct 2013 11:31:20 -0400
> Subject: Re: [R-390] Sherwood
> 
> All the more reason to ask for a published schematic
> 
> 
> Lester B Veenstra  MØYCM K1YCM W8YCM
> lester at veenstras.com
> 
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> -----Original Message-----
> From: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net]
> On Behalf Of Bob Camp
> Sent: Sunday, October 20, 2013 10:25 AM
> To: R-390 at mailman.qth.net list
> Subject: Re: [R-390] Sherwood
> 
> Hi
> 
> Which is why you probably should re-design it with up to date parts if you
> wanted to keep selling them. SMT has pretty much taken over in the world of
> semiconductors. There are some parts (or even categories of parts) that
> simply are not available in a "hand solder" sort of package. Yes for a home
> build you can find this and that. For a commercial product that's expected
> to last, off to the pick and place machine ….
> 
> None of this is a knock on the fine design job he did on the SE-3, it's just
> the way the semiconductor business has gone over the last two decades. I
> doubt that we have done a single "non SMT" design at work in the last 10
> years. We've probably done several thousand SMT designs. Just to be clear -
> to me SMT is anything that is fine enough pitch that hand solder is not
> economically practical. By that definition a SOT-23 is not a hand solder
> part (yes I've been hand soldering them since the 1970's) in a deliverable
> product. 
> 
> Bob
> 
> On Oct 20, 2013, at 9:33 AM, frank hughes <fsh396ss at gmail.com> wrote:
> 
> > Hi,
> > One of the interesting things Rob mentioned to me when I bought an 
> > SE-3 years ago was component availability.
> > 
> > The issue was difficulty obtaining some of the components that the 
> > design required, sounded like there were some items being discontinued 
> > that he needed.
> > 
> > Must be a pain to keep a design going and avoid having to re-design 
> > just to keep up with component availability.
> > Frank
> > KJ4OLL
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