[Elecraft] SMT kits and Elecraft

[John A. Ross [RSDTV]]

> -----Original Message-----
> From: elecraft-bounces at mailman.qth.net 
> [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Ron 
> D'Eau Claire
> Sent: Wednesday, August 11, 2004 1:25 AM
> To: 'Elecraft Mail list'
> Subject: RE: [Elecraft] SMT kits and Elecraft
> 
> Ouch! The stuff that I've see so far has numbers - but 
> really, really, REALLY small in many cases. 

Ron

Yeah mostly chip resistors have numbers using standard conventions, except Rohm/Eurohm who can have
a really funky system, don't expect 102 to be 1K from some of these guys.

But MLC caps 1206 (3.2 x 1.6mm) and below are rarely marked, but depends on manufacturer, 0805 (2.0
x 1.25mm) have never had markings as far as I recall. These I would view as big passive parts,
excluding chip electrolytic/tantalums.

Was that your definition of small?, normally we use 0603 (1.6 x 0.8mm) or 0402 (1 x 0.5mm) every
day.

No metric comments please ;-), its an affliction but I am used to it.

John (GM1BSG)
 
> Ron AC7AC
> 
> -----Original Message-----
> Ron
> 
> You usually do not get identification marks on chip 
> capacitors, melf/SOD80 diodes or SOT23 parts (transistors etc)
> 
> This is what I see as the biggest issue to SMD kits as there 
> is no visual way for the builder to validate he has the 
> correct parts in the correct place so its all down to getting 
> these in the right place first time. 
> John
> 
> 
> 
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