"Robert Casey" wrote in message
...

I sure couldn't parrot what the exclusive Extra sub-bands
are for HF if I was asked.

But as an Extra, you don't *need* to know that, Bill!
You just need to know the
band and mode subband limits.

As above, have you memorized them all?

Well, extras can use any ham frequency.
But you still need to know what
modes go in what subbands.

Exactly my point.

Better to know the person can read
and use the frequency chart because
it does change over time.

See above.

We disagreee then on that.

I use a chart when using an unfamiliar band.

As do I. Additionally, as we have all seen too,
band edges for modes of operation can and do
change. Memorized spectrum or band edges
by mode today may not be accurate tomorrow.

The concept that you can operate
whatever mode you happen to hear on
whatever frequency doesn't always
work. Like on 80 and 40.

Agree 100%.

Cheers,
Bill K2UNK