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08-22-2018, 04:46 PM
Hi Guys
Tube voltage ratings took a leap in the mid-1950s with a change from Design Center to Design Maximum ratings.
The old system took into account the variations of the tube manufacturer's process AND second-guessed the variations in the end user's product design, leading to very conservative ratings.
The new system only took account of the tube manufacturer's variations and suddenly the tubes sitting on your shelf or in your equipment were rated for much more voltage.
Unfortunately, you still see many data sheets for "new" tubes using old voltage values.
Have fun
Tube voltage ratings took a leap in the mid-1950s with a change from Design Center to Design Maximum ratings.
The old system took into account the variations of the tube manufacturer's process AND second-guessed the variations in the end user's product design, leading to very conservative ratings.
The new system only took account of the tube manufacturer's variations and suddenly the tubes sitting on your shelf or in your equipment were rated for much more voltage.
Unfortunately, you still see many data sheets for "new" tubes using old voltage values.
Have fun
