Kind friends...
This is to inquire as to the 'survivability' of electron tubes following several months exposure to ambient pressures of Ca. 54 PSI (372 kPa) (metered).
The tubes are located in a (presumably) dry hold aboard a sunken vessel at ~ 20 fathoms (36.6 meters) fresh water --- I have been offered the contents of said hold (over six tons of assorted NOS 'transmitting', industrial and radiography/DRT tubes) contingent upon my (not inconsiderable) assistance with the salvage (refloating) effort...
While most of said cargo is comprised of glass and ceramic high power 'transmitting' types - my principal interest is in the two dozen Coolidge RAs (a representative example of which is shown in the image below) --- FWIW, Owing to vertical stowage and the reasonably 'gentle' grounding of the boat, I don't anticipate breakage owed to excessive cantilever forces acting upon the anode seals --- Please note also that I am not concerned with the integrity of potted assemblies - merely the electron tubes contained therein (AKA "inserts" for those with a preference for 'trade speak') inasmuch as the envelopes must support well over four times manufacture-anticipated ambient 'storage' pressure... <<<Edit to clarify pressure ratio>>>
Again, although the tubes are expected to be dry, the pressure is commensurate with depth inasmuch as the hold is not airtight - but, merely, airlocked...
Inasmuch as 'geometry matters' where structural integrity is concerned -- here is an image of a typical Coolidge RA -- Please note that the volume ranges from Ca. 0.75 litre to 5 litres across various types...
Please understand this is merely a request for input -- For which I offer sincere gratitude - without regard to the outcome of my decisions! --- IOW: Should I accept the offer, and the week's work earns me nothing but a trailer full of shards - it's no one's fault but my own! -- I'm merely asking for opinions!
Very best regards
HP
This is to inquire as to the 'survivability' of electron tubes following several months exposure to ambient pressures of Ca. 54 PSI (372 kPa) (metered).
The tubes are located in a (presumably) dry hold aboard a sunken vessel at ~ 20 fathoms (36.6 meters) fresh water --- I have been offered the contents of said hold (over six tons of assorted NOS 'transmitting', industrial and radiography/DRT tubes) contingent upon my (not inconsiderable) assistance with the salvage (refloating) effort...
While most of said cargo is comprised of glass and ceramic high power 'transmitting' types - my principal interest is in the two dozen Coolidge RAs (a representative example of which is shown in the image below) --- FWIW, Owing to vertical stowage and the reasonably 'gentle' grounding of the boat, I don't anticipate breakage owed to excessive cantilever forces acting upon the anode seals --- Please note also that I am not concerned with the integrity of potted assemblies - merely the electron tubes contained therein (AKA "inserts" for those with a preference for 'trade speak') inasmuch as the envelopes must support well over four times manufacture-anticipated ambient 'storage' pressure... <<<Edit to clarify pressure ratio>>>
Again, although the tubes are expected to be dry, the pressure is commensurate with depth inasmuch as the hold is not airtight - but, merely, airlocked...
Inasmuch as 'geometry matters' where structural integrity is concerned -- here is an image of a typical Coolidge RA -- Please note that the volume ranges from Ca. 0.75 litre to 5 litres across various types...
Please understand this is merely a request for input -- For which I offer sincere gratitude - without regard to the outcome of my decisions! --- IOW: Should I accept the offer, and the week's work earns me nothing but a trailer full of shards - it's no one's fault but my own! -- I'm merely asking for opinions!
Very best regards
HP
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