bd6ax的做法是剪开d63，互联网上查到的英文资料说剪开d99。
我在下载的电路图上找了半天，只分辨出了d63。
偶然机会找着了一份质量稍好的ft-80c电路图图片，这才发现d99就是d63下边的稳压管。
这样的话，bd6ax的做法和国外ham的做法应是一样的。
=========英文改功率资料============
modifications for the yaesu ft-747
...
...
ft-747 power mods
for some time now i have wondering about reducing the power output on my yaesu ft747gx, in the ssb mode.
i have looked at using the external alc to do this, but did not wish to have another lead running out of the back of the radio.
i looked at the schematic of the rig and decided that if i removed the diode d99 from the circuit, i would be able to utilize the drive control on the front panel to reduce power in ssb mode.
after removing the top cover from the radio, i removed the screw holding the crystal filter board in place and removed the board (simply lift squarely), under the board you will see d99 marked on the main board.
i just cut the lead to the diode so as to allow reconnection at any time. after i had done this mod i replaced the crystal filter board (and screw) and tested the rig.
the results were excellent, i have full control of the power from 100w down to less than than 50mw.
i tested the rig on air and worked a station about 2 miles away with 250mw, on the 7 mhz band, below that level i was drown out with qrm.
after looking at the prices of some of the commercial qrp rigs available i feel that the ft747 is a rig looking at, i also intend to use it for driving a transverter.
...
=========================
