According to telescope making volume 3, the filament materials in
order of merit are tungsten, tantalum, molybdenum and columbium.
Nichrome may also work as Nickel is a possible material. Nichrome may
be more easily available if you work in an industry that uses
furnaces as it is used for furnace elements .
Electrical pass throughs can also be constructed by drilling a hole
and then making sure that contact does not touch the sides and use a
neoprene or similar insulating material to insulate. Also from
telescope making vol3.
Geoff
toggle quoted message
Show quoted text
------------------------ Yahoo! Groups Sponsor
---------------------~--> Buy Ink Cartridges or Refill Kits for your
HP, Epson, Canon or Lexmark Printer at MyInks.com. Free s/h on orders
$50 or more to the US & Canada.
---------------------------------------------------------------------~
->
To unsubscribe from this group, send an email to:
VacuumX-unsubscribe@...
----------------------------------------------------------------------
--
There is 1 message in this issue.
Topics in this digest:
1. aluminizing chamber electrodes queery
From: Dominic-Luc Webb <dlwebb@...>
______________________________________________________________________
__
______________________________________________________________________
__
Message: 1
Date: Mon, 8 Dec 2003 12:38:11 +0100 (MET)
From: Dominic-Luc Webb <dlwebb@...>
Subject: aluminizing chamber electrodes queery
This is my first post to this list. Let's see if it works.
I have a vacuum chamber, which pulls needed vacuum for aluminizing, so
I am now at stage of needing to get electrodes into the stainless
steel chamber. James Learch already offered some ideas, and I was
hoping to see if there were others as well. I would be happy to know
of specific electrodes used and how they were inserted into the
chamber.
Along same line, anyone know if Tungsten is really required? Can I now
instead use something like Kanthal wire or perhaps a car cigarette
lighter heating element, etc? This seems more convenient.
I'll now wait and see if this gets distributed to the members.
Dominic-Luc Webb
______________________________________________________________________
__
______________________________________________________________________
__
Your use of Yahoo! Groups is subject to
