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Modification for Yaesu FT- 411 Handheld
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FT411.1
Subject: FT411 MODIFICATION VIA COMPUTER
I was unhappy with the FT-411's "3" mode because the frequency had
to be entered starting with the 100 MHz digit, and the ARS function
would not work. I now use it in the "2" (normal) mode with the
following mod.
I used the "clone" mode to dump the FT-411's ram to a computer. It's
9600 baud, 1 start bit, 1 stop bit, CMOS logic. 544 bytes are dumped
when the up arrow is pressed. Starting with byte $211 are the upper
and lower transmit and receive frequencies, stored in BCD. I changed
these to the limits I wanted. My FT-411's upper PLL limit is 195.4
MHz, so I used 195 MHz. The lower limit MUST remain set to 130 MHz
(magic number) or the keyboard entry of frequencies will start with the
1 MHz digit .VS. the 10 MHz digit. To put the data back into ram, just
press the down arrow and send the new 544 bytes to the FT-411. You
could also just clone an H.T. that has the limits you want. You can
not clone a mode "3" H.T. to a mode "2" H.T., however. The mode is
contained in the first byte, which must match.
Bill Pherigo WR0Y
Note: I have not tried or verified this, proceed at your own risk!
WA2ISE
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