Work in IT. You'll do all 3....
Careful, don't get the ITIL on your shoes.....
On Wed, Jan 6, 2021 at 12:29 PM Leon Robinson <leon-robinson@...>
I have had horses for over 40 years and I don't remember going around and
smelling warm horse s*hit, have stepped in some and shoveled a lot.
Leon Robinson K5JLR
-------- Original message --------
From: Brad Thompson <brad.thompsonaa1ip@...>
Date: 01/05/2021 9:25 PM (GMT-06:00)
Subject: Re: [TekScopes] A note on PC boards, double and single sided.
Harvey White wrote on 1/5/2021 8:55 PM:
Printed circuit boards are generally made with one of two materialsHello--
(there are others), either a paper epoxy (FR-3) or a fiberglass epoxy
(FR-4). There are others, but these are most common.
Paper epoxy (FR-3) has a lower temperature tolerance, is not as
mechanically stable, can be burnt easily, and is constructed of paper
and epoxy holding it together. You see it in a lot of commercial
(expensive or not...) equipment. It is mostly brown...
Older imported electronics used a phenolic-based laminate-- typically
medium to dark brown
and liable to losing its traces when the repairer applied too much heat.
Oh, and when overheated
it smelled like warm horse s*it.