"Bill M" wrote in message
...
I'm a little confused again.

Setting up a 1624 tube for cathode biasing and also need to create a
center tap for keying to ground.

The book says 610 ohms at my voltage. So would I use a pair of 1200 ohm
resistors in this case?



Correct, both resistors would essentially be in parallel, and from
the hot cathode to ground. Using two resistors would help
balance out the 60 cycle hum as an added benefit, which is
what I assume you're trying to accomplish.

Pete