[Drake] Fw: Tube Glues Again, Plate Caps

Tue, 27 May 2003 23:49:03 -0400

After posting my last message, I remembered to look though my
old posts.  I found this one that was sent to another list.
It has some suggestions as to a replacement for Sauereisen
cement.

        73,  Dr. Barry L. Ornitz     WA4VZQ     [email protected]

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

----- Original Message -----
From: "Barry L. Ornitz" <[email protected]>
To: "Old Tube Radios" <[email protected]>
Sent: Tuesday, October 01, 2002 07:04 PM
Subject: Tube Glues Again, Plate Caps

> A little while back the group discussed various options for
> gluing tubes back into their bases.  I mentioned the use of
> Sauereisen Cement for gluing on plate caps for high
> temperature (transmitting tube) applications.  This is an
> old laboratory product, seemingly around forever, that most
> chemistry labs always seem to have hiding on the back shelf
> of a storage cabinet.  Actually the Sauereisen Company makes
> a number of high temperature cements for different
> applications.  It is an old company with an excellent reputation.
> Check their website for details:
>     http://www.sauereisen.com.
>
> In an offline conversation with Roy Morgan, K1LKY, he asked
> about making something similar.  I suggested a high
> temperature pyrotechnic adhesive based on magnesium oxide
> and calcium carbonate mixed with sodium silicate solution
> to form a thick paste.
>
> But then I remembered that Omega sells a number of high
> temperature cements to glue and insulate thermocouples in
> high temperature applications.  Omega sells in small
> quantities, and they have a huge assortment of products
> related to temperature measurement and other
> instrumentation.  Looking on their website, I found several
> high temperature cements that might be suitable
> replacements for the Sauereisen.  Note that I have not
> tried these, but based on the product specifications, they
> might work well too.
>
>         http://www.omega.com/Temperature/pdf/OB_BOND_CHEM_SET.pdf
>
>
http://www.omega.com/Temperature/pdf/OB_OMEGABOND_AIR_SET.pdf
>
> Please read the curing instructions carefully as some of
> these products require an extended conditioning period
> above 100 C to evaporate out residual water.  Also note the
> materials computability of these.  At least one will not
> stick to quartz (and likely not to high temperature
> borosilicate glass either).
>
>         73,  Barry L. Ornitz     WA4VZQ     [email protected]
>         Copyright 2002 B. L. Ornitz  -  Do not repost without
permission.