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Yaesu FT- 23R mods
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FT23R.2
Date: 11 Mar 90 01:28:48 UTC (Sun)
From: [email protected] (Bob)
Message-ID: <21172@KD6TH>
Reply-To: wa2ise@WA2ISE
To: all@allbbs
Subject: FT211, FT23 mods
copied from UUCP:
>From: [email protected] (9081)
Newsgroups: rec.ham-radio
Subject: Re: Yaesu Mods
The uP's in the FT-23R and the FT-211R/H can be set for several
frequency and memory mode combinations. These modes are contorlled
by the jumpers (solder pads) marked 7,8 and 9 on the processor
board of either radio. Here's a list of what can be done:
JUMPER CONFIG DISPLAY MODE
7 8 9 NUMBER
open open in 1 140 to 164 MHz, amateur mode
open in in 2 140 to 160 MHZ, amateur mode
in open in 3 144 to 148 MHz, amateur mode
in in in 4 144 to 146 MHz, amateur mode
open open open 5 220 to 550 MHz, commercial mode
open in open 6 440 to 450 MHz, amateur mode
in open in 7 50 to 300 MHz, commercial mode
in in open 8 430 to 440 MHz, amateur mode
Both of my radios (USA) were shipped from the factory in config #3.
They can be converted to config #1 without re-tuning just by changing
the jumpers. Tuning range can be further expanded by changing to
jumper config #7. The FT-211 has separate VCO's for transmit and receive
and will lock over about 38 MHz from approx. 130 to 180 MHz. The FT-23
has only one VCO and the overlapping lock range (Xmt & Rcv) is about
25 MHz from approx. 135 to 175 MHz. Don't forget, if you adjust the
VCO you must re-align every electronically tuned stage in the front
end of the radio. The transmitters can be tuned for somewhat higher
power output above 164 MHz but at a great power loss at 2m.
The commercial memory mode will cause these functional changes:
1.When in the MR mode, the channel number will be displayed instead
of frequency. You can toggle back to the original "amateur" mode
display by pressing F<up-arrow>. Pressing F<down arrow> takes you
back to commercial mode. However, when switching from D to MR, the
display will always revert to the commercial mode.
2.The function of the Dot<Pri> button will be exactly reversed. That
means now you can press just one button (Dot) to get into or out
of the Primary function. The Pri funtion (in memory mode) will
be indicated by a large "P" on the left side of the display.
CONT IN FT23R.3
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