[ARC5] A little off-topic: Metal tubes (eg 6SJ7) seem quite valuable ...

[William Cromwell]

Hi,

A coupla things.

I have used rusty tubes as-is successfully. Your mileage may vary.

I have been lead to believe that inside that metal shell is a glass 
tube. The vacuum is not dependent on the integrity of the metal shell. 
Naybe somebody has contradictory information with citations.

73,

Bill KU8H

bark less - wag more

On 9/15/21 2:10 PM, Leslie Smith wrote:
> A link: https://www.ebay.com.au/itm/283973399609 
> <https://www.ebay.com.au/itm/283973399609>
>
> Makes the idea of polishing rusty tubes worth-while.
>
> Leslie
>
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