I read in !emc-pstc that Fred Townsend wrote (in
<3e3af280.5e519...@poasana.com>) about 'BeCu problem' on Fri, 31 Jan
2003:
>John, tubes are like vacuum deposition chambers. I have difficulty believing
>that
>a fancy form of carbon would be of any use in molded structures, HV, or HVAC.
>These co
From: owner-emc-p...@majordomo.ieee.org
[mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of drcuthbert
Sent: Friday, January 31, 2003 7:43 PM
To: 'Fred Townsend'; John Woodgate
Cc: emc-p...@majordomo.ieee.org
Subject: RE: BeCu problem
I worked on a 1 MW, 160 GHz Gyrotron in 1982 that used a
[mailto:f...@poasana.com]
Sent: Friday, January 31, 2003 3:03 PM
To: John Woodgate
Cc: emc-p...@majordomo.ieee.org
Subject: Re: BeCu problem
John, tubes are like vacuum deposition chambers. I have difficulty believing
that
a fancy form of carbon would be of any use in molded structures, HV, or
HVAC
I read in !emc-pstc that Gregg Kervill wrote (in
<004001c2c959$eb0daed0$7100a8c0@MENHADEN>) about 'BeCu problem' on Fri,
31 Jan 2003:
>Good point John - then we can justify the $5,000 screwdriver.
You can buy Japanese loudspeakers with cones coated in VPD diamond now.
Not cheap, but not in the m
John, tubes are like vacuum deposition chambers. I have difficulty believing
that
a fancy form of carbon would be of any use in molded structures, HV, or HVAC.
These conditions are all found in radar tubes.
Also, thanks to Greggs comment about fancy screw drivers, I remembered that
BeCu
screw dr
I read in !emc-pstc that don_borow...@selinc.com wrote (in
) about 'BeCu
problem' on Fri, 31 Jan 2003:
>I have seen stainless steel used as battery contacts. The contacts
>developed an oxide on them that made it difficult to get power from the
>battery. Seems to me that some plating could solve t
Good point John - then we can justify the $5,000 screwdriver.
Gregg
From: owner-emc-p...@majordomo.ieee.org
[mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of John Woodgate
Sent: Friday, January 31, 2003 10:35 AM
To: emc-p...@majordomo.ieee.org
Subject: Re: BeCu problem
I read in !emc
Hi Jan,
In addition to health aspects, BeCu is incompatible with most
enclosure materials and coatings (to prevent rust and corrosion) used
in equipment. After a couple of weeks a BeCu finger in contact with a
chassis will leave a black smudge, the corrosion byproducts resulting
>from the bat
I read in !emc-pstc that Fred Townsend wrote (in
<3e3a35fb.6ecc...@poasana.com>) about 'BeCu problem' on Fri, 31 Jan
2003:
>BeO has seven times better thermal conductivity than AlO (alumina). There is
>no real substitute for BeO at high power levels. It is still used by the
>Military in high po
Jan -
Both Be and BeO pose health risks. While I can't point to
anything to support the claim, BeCu will probably become a
part of the product take back/recycling.
I did text searches of the WEEE and the RoHS Directives and
found no mention of Be in any form.
Be and its compounds are looked a
Please respond to Fred Townsend
Sent by:owner-emc-p...@majordomo.ieee.org
To:Jan Vercammen
cc:emc-p...@majordomo.ieee.org
Subject:Re: BeCu problem
I can't help you with the regulations but I can clarify the usage of
Beryllium
a bit. When Beryllium is added to copper it
I can't help you with the regulations but I can clarify the usage of Beryllium
a bit. When Beryllium is added to copper it makes it very hard. It is used in
gaskets to make them springy. Stainless steel is a poor substitute because it
lacks both the electrical and thermal conductivity.
So far
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