I think in the more extreme cases the metal can rust and expand and crack
the seal.
But it may take some time for that to migrate thru the entire seal.
However, thinking about it a bit,
a small crack could expand when the glass is under thermal stress.
Bill
At 09:59 AM 5/11/2011 -0400, Randall, Randy wrote:
>I would wonder about the 3-1000 glass to metal seals. Since the 3-1000
>constructed similarly to the 3-500z, would not it have the same issues
>with the pin seals leaking over time? I have seen warnings about storing
>the 3-500's in a damp environment and I think a flood is as damp as it
>gets. ;'>
>
>Randy.
>
>Randy E. Randall AB9GO
>Network Engineer
>UC Health
>Randy.Randall@UCHealth.com
>Phone 513-585-7146
>Fax 513-585-7159
>
>-----Original Message-----
>From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
>Behalf Of k7fm
>Sent: Wednesday, May 11, 2011 8:59 AM
>To: Rob Stampfli; amps@contesting.com
>Subject: Re: [Amps] 3-1000 Amplifiers
>
>"Just curious: I know you say the tube was not in the water, but would
>an unenergized glass tube be damaged from being submerged in a flood
>for a day or two? "
>
>Since the tube is in a vacuum, nothing inside will be hurt. Perhaps the
>big issue is that a big tube like the 3-1000 will try very hard to float
>down the river, since it will not like being under water. Sort of like the
>Japanese fishing floats that used to wash up on the West Coast beaches. So,
>new original stock vacuum tubes in their original boxes are likely to go
>away during a flood.
>
>If the tube remains, there could be corrosion of the tube base and plate
>cap.
>
>73, Colin K7FM
>
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