Topband: W8JI FT1000MP MKV Click Modification
W4EF at dellroy.com
Sun Oct 23 02:43:49 EDT 2005
I just installed in my FT1000MP Mark V W8JI's recommended
click-modification per the instructions on his website:
Comparing the before and after modification RF keying envelope
waveforms on an oscilloscope, the difference in the rise and fall
time is very pronounced (~1ms before modification vs ~5ms after
modification) except for the leading character between word
spaces. Even with Tom's modification in place, the leading character
after a word space (or longer pause) shows the same fast rise
time (~1 ms) and hard edge transition as the unmodified radio.
When I listen to the MK V on a separate receiver you can hear
the very loud click on the leading edge character. This is in
contrast to the rest of the characters which are very soft with no
clicks at +/- 1 KHz from the carrier. If I lock the MK V "MOX"
(same as PTT closed), it doesn't make any difference. I still get
the hard leading edge after a word space or longer pause.
Has anyone else noticed this? I am sure the modified radio is
better than it was as evidenced by the smooth and slow falling
edges and the mostly smooth and slow rising edges), but that
leading edge click is still going to be annoying to whoever is on
the butt end of it.
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