Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

----- Original Message -----
From: "Jan Kok" <kok@...>
To: <Homebrew_PCBs@yahoogroups.com>
Sent: Tuesday, April 22, 2003 7:57 PM
Subject: [Homebrew_PCBs] Stirring or pumping etchant

The older ARRL Handbooks had an agitation system involving an eccentric
mounted on a slow electric motor shaft. The tray was positioned so that the
eccentric rocked it continuously. A heat lamp was mounted above the tray to
keep the etchant hot.

I just agitate a plastic food container holding the etchant and PCB
manually, with it surrounded by a larger container half-filled with very hot
water. I wear rubber gloves to protect my hands. It takes 5 to 10 minutes to
etch a typical board, using FeCl3.

Leon
--
Leon Heller, G1HSM
leon_heller@...
http://www.geocities.com/leon_heller