[Amps] Gas Regulator Tubes

[Harold B. Mandel]

In researching a "retro" amplifier design for a collector
who would like to commission a tube amplifier project,
the possibility of using 0D3 type cold-cathode gas 
regulators came up in conversation.

On further research I found a very cheap supply,
but the admonition of "they only last about a year,"
accompanied the information of availability.

Why would these tubes only last a year if they
were properly current-limited?

Hal Mandel
W4HBM