So a 50 resistor serves as my dummy load and a meter connected to
the dummy load indicates around 10 volts RMS. If I did my homework that
would indicate around 2 watt output. All this at B+ of 200v and an anode
current of about 35mA (I am running the transmitter off an adjustable bench
tube power supply at this point).

Does all this compare with the numbers you get with your transmitter??
I will need to build a power supply for the final version and would be
interested to know what you use for B+. In order to get 5 Watts I would have
to crank up the B+ quite a bit.

Actually I don't care at this point since I am still practicing for my code
exam, so I can't even use the transmitter right now.

How do you monitor your transmitting tone with a device like this.

I run my 6V6's at about 325 volts on the plate, 250 on the screen. The plate is
loaded to about 40ma, which is about 13 watts input. You can push it beyond
this, but there's really no point since you have to quadruple your power to
gain one S unit on the receiving end. You'll get about 8 watts out which is
fine. If you want something heftier, you can go to a 6L6, 807 or 6146 tube.
There is a compromise with single tube transmitters though, as the power goes
up they tend to chirp, that is, the frequency slides a bit as they are keyed.
It's not objectionable on the 6V6 transmitters, which is why I favor this power
level.

I started out in 1954 with a surplus ARC-5 receiver and a simple 6V6
transmitter. With it I gained code proficiency and managed to work 28 states
before my Novice licence expired. (They were only good for a year back then.)

For monitoring, you can just use your receiver with the antenna disconnected,
or you can construct any number of monitor devices which you will find in the
ARRL handbook. You can get more sophisticated but you don't have to. There is a
special satisfaction in communicating with very simple equipment.

Doug Moore KB9TMY