After lookin through the whole forum for an answer because the search form wouldn't search for it, I found the answer on how to lower the output from 10W on both CW & SSB. Thanks Adrian, ∞ 5B4AIY for his explanation from a few years ago. Posted here for an answer so others can reference:
"The output power of the transceiver can be adjusted by means of the carrier level control
R28 on the main board for CW output. It is normally set to give an output of 10W, but this can easily be reduce to 5W by re-adjusting this potentiometer if you wish.
The output power can also be set with the on-board attenuator. This is set by selecting the TUNE mode, press the PTT switch, and then press and hold the PWR button whereupon you will be able to adjust the output power by inserting or removing steps of the fixed attenuator. The step setting will be stored in the EEPROM for future use.
You say you are using my firmware version 1.07u, there is now a new version, 1.07x that has a number of improvements that you may wish to install, along with an updated user manual. Drop me an email to:
adrian04@cytanet.com.cy and I'll be happy to send you this latest version. There is also a new version for the PA-100D linear amplifier, if you have that equipment as well.
I forgot to mention
R26, which adjusts the gain and hence the output power on the SSB modes, my apologies. R28 sets the CW carrier level, of course. By adjusting these two potentiometers you can easily set the transceiver up for no more than 5W in either CW or SSB modes. The fixed attenuators are really there to equalize the output power across all the bands, and this is most easily accomplished using the serial test suite's Auto Equalize feature. I'll send you the latest versions today. Again, my apology for forgetting R26.
If you are operating RTTY/PSK-31, then you can also set the output power in this mode by adjusting the input drive level as well. When the input source of the Juma is set to LINE and with the speech processor turned off, the input sensitivity is somewhat low and you will have to use a fair amount of drive, but this also means it is hard to really over-drive the power amplifier. I use mine with the excellent NUE-PSK self-contained modem, and when using this its output jumper has to be set to the HIGH position to provide sufficient drive, but it also means that the Juma is relatively insensitive to RF pickup."