Newsgroups: rec.radio.amateur.misc
From: brian
Subject: Yaesu FT-5100/5200 mods
Originator:brian
Organization: Advanced Micro Devices, Inc., Austin, TX.
Date: Wed, 14 Apr 1993 15:59:30 GMT
Lines:363
I've received many requests for the 5100/5200 mods, so I'm posting
them. I'd like to get them onto an ftp site or two, but can't do that
myself, so please e-mail me if you can do this for me. Thanks to the
contributors and the folks who reviewed Rev A!
73, Brian
cut here...
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Yaesu FT-5100/FT-5200 MODS
Rev B (14 Apr 1993)
This is a collection of hardware and software mods for the Yaesu
5100/5200 pair. I have the 5100, so I can't verify these for the
5200. I have collected every mod seen on the net (ie. Usenet) since
the introduction of the 5100, so I think this list is fairly complete.
I am interested in getting updates and corrections to this list, so
please send me e-mail if you find something that needs updating.
(This includes typos, wrong or missing attributions, caveats, warnings
about unmentioned side effects, serial numbers of radios that won't do
some of these mods, etc.)
SOME OF THESE MODIFICATIONS MAY DAMAGE YOUR RADIO IF YOU PERFORM
THEM IMPROPERLY. WHEN IN DOUBT, DO NOT PERFORM THE MODIFICATION.
This advice is free, so remember that you get what you pay for.
Brian McMinn (brian.mcminn
N5PSS
512-462-5389
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Backlight Control:
Effect:manual control of backlight
1) Hold down the MHZ key and turn radio on
2) Use tuning knob to adjust brightness
3) When FUNC is active, the tuning knob will adjust
brightness again.
4) You can restore automatic control by repeating step 1.
Notes: Manual is fuzzy on this feature.
Attributed:Yaesu
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Crossband Repeat (reported as working on 5100 and 5200):
Effect:Enable crossband repeat
1) Dial up two frequencies you want to crosslink (be sure to
pay attention to transmit offsets, if any)
2) Turn radio off.
3) Hold down the RPT key and turn radio on
Result: The tone encode/decode flags and the -+ flags will be
flashing and the radio will be in low power mode. When either
band's squelch opens, the other band is moved into the primary
frequency display and the transmitter keys. Audio link
appears to be speaker to mike.
Exit crossband repeat mode by repeating steps 2 and 3 above.
Attributed:Yaesu
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Transmitter Timeout:
Effect:automatically limit transmitter "on" time
1) Hold down the HIGH/LOW button and turn radio on
2) Use tuning knob to change the number in left VFO. This
number is number of minutes for the timeout timer. The
factory default appears to be 15 minutes.
3) Transmitter shuts off with "Err" displayed in VFO if the
time limit is exceeded.
Attributed:Bill Mayhew, N8WED, wtm
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Crossband Audio Enhancement:
Effect:unmuffle crossband audio
Connect a 27K ohm resistor between the audio-in and auido-out
leads on the data jack (inside the shell of a mini plug, that
is). The mic element stays live while in xband operation. It
is a good idea to remove the mic from the rig while cross
banding if you need/want to eliminate ambient audio.
Attributed:Bill Mayhew, N8WED, wtm
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The "P" Key on the microphone:
I was curious about that "P" key on my FT-5100, so I called
Yeasu and they explained the situation. They designed the the
mic to accomidate "future products". The "P" key is there to
be taken advantage of at a later date by other models. They
just did not want to re-design the mic again within a short
period of time.
Attributed:Will Collier, KB5WRK, COLLIER
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Expanded Receive:
Good Effect:enable extended receive coverage
New range: 128-180MHz and 420-475MHz
Bad Effect:disable automatic repeater shift selection.
Warning:This mod does not apply to the FT-5200 as the design
is somewhat different.
Warning:You must have a very steady hand or else! A
magnifying glass would help too.
1) Disconnect DC Power cable from radio. ALWAYS!
**Caution** NEVER TRY TO TAKE APART (DISASSEMLBLE) THE FRONT
CONTROL HEAD. It will void your warranty.
2) Remove (6) screws from Top Cover of Radio and (6) screws
from Bottom Cover of radio.
3) Remove Top & Bottom Covers from Radio (Be careful of speaker
falling out).
4) Remove the (2) silver screws on each side of the radio
holding front control head to main body of radio.
5) Carefully pull away (a few inches) the Control Head from
the radio body. CAREFUL with the Ribbon Cables.
**NOTE** There are no numbers on the circuit board so you will
have to match up with the diagram below.
6) On the rear of the Control head locate, Unsolder and remove
jumper Pad R4072.
7) Solder across jumper pads:R4070 R4068 & R4064 (use wire or
0 Ohm resistor)
**NOTE** If you want to change the D/MR button on the
microphone to do Band Switching, now is the time.
See the next mod.
8) Install Front Control head, Speaker, Top and Bottom Covers
and Reconnect Power to the Radio.
9) Press and hold [D/MR] [F/W] [REV] Keys and turn on the Radio.
Radio will now show 300.000 & 20.000 on Display.
10) Set UHF Rx Low - Press [MHz] and dial 420.00, press [D/MR]
11) Set UHF Rx High- Press [MHz] and dial 475.00, press [D/MR]
12) Set UHF Tx Low - Press [MHz] and dial 420.00, press [D/MR]
13) Set UHF Tx High- Press [MHz] and dial 450.00, press [D/MR]
14) Set VHF Rx Low - Press [MHz] and dial 128.00, press [D/MR]
15) Set VHF Rx High- Press [MHz] and dial 180.00, press [D/MR]
16) Set VHF Tx Low - Press [MHz] and dial 140.00, press [D/MR]
17) Set VHF Tx High- Press [MHz] and dial 150.00, press [D/MR]
18) Set UHF offset - Press [F/W] then [RPT] dial 5.000 press [RPT]
19) Set UHF tuning - Press [F/W] then [REV] dial 25.0 press [RPT]
20) Set VHF offset - Press [F/W] then [RPT] dial 0.600 press [RPT]
19) Set VHF tuning - Press [F/W] then [REV] dial 20.0 press [RPT]
(VHF tuning step varies by state -- many use 15.0)
Diagram:[there are no tabs in this section - ed]
Ok, here's where it gets tricky, but so you know, a '|'
represents a jumper.
!Ribbon ! !Ribbon !
!Cable ! !Cable !
____!J4002 !_______________________!J4001 !_____________
! !________! !________! !
! Rear view of FT-5100 !
! ____ Control Head. !
! ! ! !
! !__! | | | | | !
! | | | | | | | | | | | | | | | | !
! R R R R R R R R R R R R R R R R !
! 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 !
! 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 !
! 5 6 6 6 6 6 6 6 6 6 7 7 7 0 0 0 !
! 1 1 2 3 4 5 6 7 8 9 0 1 2 1 3 4 !
!__________________________________________________________!
Stock US Jumpers After Mod. Jumpers
R4001 R4001
R4003 R4003
R4004 R4004
R4051 R4051
R4061 R4061
R4062 R4062
R4064
R4067 <- for D/MR button mod
R4068
R4070
R4072
This mod is on Delphi as FT5100.MOD and on anomaly.sbs.com.
Attributed:Tony Pelliccio, KD1NR system
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Band Switching via D/MR button on microphone:
Effect:D/MR button on microphone performs band switching
rather than D/MR function.
1-5) as in above mod
6) Remove the jumper on Pad R4067
7) skip above step 7
8) continue with step 8 above
Attributed:Tony Pelliccio, KD1NR system
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[end of mod sheet Rev B]
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Band Switching or Tone Burst via D/MR button on microphone (5200):
Effect:change function of D/MR button on mike.
This is based on information from Yaesu in Japan.
The functions of pin 5 (the microphone button) can be altered
by changing jumpers in the control head. To find these
jumpers, see the section on packet radio in the ordinary
instruction book.
Control Head Jumper No
Pin 5 Function Closed Jumper Marked By X
1 2 3 4 5
D/MR X
Band X
1750Hz Tone Burst X X
Main band Busy Out X
Sub band Busy Out X
Call Channel X X
Main / Sub band busy out - When open SQL = 5 Volt DC
Closed SQL = 0 Volt DC
[ed - I'm not sure what this means since I don't own a 5200]
Attributed:John Newgas, G7LTQ jnewgas
g7ltq
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Mute Level (5200):
Effect:[ed - I'm not really sure]
See above for location of jumpers, etc.
Mute Level Selection 1 2 3 4 5
No Mute
Minimum X
Middle X
Maximum X X
Attributed:John Newgas, G7LTQ jnewgas
g7ltq
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Crossband Repeat (5200):
Effect:crossband repeater
Bad effect:CTCSS function is lost
[ed -- there is another crossband mod in this list...]
This is based on information from Yaesu in Japan.
These jumpers are located in the main radio case. For
location, refer to the FT5200 Technical Guide.
1) Remove (open) JP5017 on the interface unit
2) Press and hold PRI button while switching on the power.
3) The FT5200 will now work as a cross band repeater.
4) The CTCSS function will be lost.
Attributed:John Newgas, G7LTQ jnewgas
g7ltq
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Extended Frequency Range (5200):
Effect:set receive and transmit range.
Bad effect:ARS gone.
This is based on information from Yaesu in Japan.
These jumpers are located in the main radio case. For
location, refer to the FT5200 Technical Guide.
1) Close (short) JP5001, JP5002, JP5003, JP5006 and JP5007
2) Remove (open) JP5004 and JP5005
The frequency range possible will now be approximately :
VHF Rx 110 - 180 MHz Tx 130 - 180 MHz
UHF Rx 330 - 480 MHz Tx 425 - 465 Mhz
The radio's alignment was done at the factory for your
original frequency bands and so there will not be optimum
behavior outside these ranges. Broadening the alignment will
sacrifice performance at usual frequencies. In practice, the
alignment does not need adjustment.
You can program the frequency limits now. [ed - note the
similarity (and dissimilarity!) to the 5100's program-limit
sequence above]
3) Press and hold [D/MR] [F/W] [REV] keys and turn radio on.
4) Program in VHF low edge of Rx
VHF high edge of Rx
VHF low edge of Tx
VHF high edge of Tx
5) Repeat for UHF in the same order.
I [John] have not done this so I can give no further advice on
programming.
Attributed:John Newgas, G7LTQ jnewgas
g7ltq
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Extended Frequency Range (5200):
[ed - yes, there are two mods and I include them both since
they are so different in style (and perhaps content).]
Effect:set receive and transmit range.
Bad effect:ARS gone.
The following explains how to expand the receive and transmit
frequency range of the Yaesu FT-5200 and how to enable the cross-
band repeater operation.
All the modifications are carried out on the interface board and
involve removing or adding links on jumper spots.
You will get considerably increased receive and transmit
coverage; however, you will lose the Automatic Repeater Shift
(ARS) feature.You may think this is an acceptable price.
Finally, it should be obvious,but during this procedure you
will obviously lose any stored memories.
1) Remove the control head and set on one side
2) Remove the upper and lower covers on the main chassis. For
convenience, remove the speaker, noting which way the two
pin pcb connector is oriented. [ed -- does it matter?]
3) Remove two side screws holding on the front of the chassis
and remove chassis front. (The chassis front is the
surface with the contacts for the control head.)
4) Locate a double row of ten by two jumper spots, numbered 1
to 20. The jumper configurations will depend on the area
for which the rig was intended. Note the arrangement if
you ever want to un-modify your radio.
5) Using a fine-tip soldering iron, set the jumper spots as
follows:
1 closed
2 closed
3 closed
4 open
5 closed
6 closed
7 closed
6) This completes the alteration for frequency expansion.
Reassemble the radio.
7) Reinitialise the radio by simultaneously holding D/MR, F/W,
REV and POWER. You must now program in the band limits.
The display will show a blinking "1" in the left-hand
memory box and "000.000" in the left-hand frequency
display. (Ignore the right-hand display for now). The
following limits are suggested, but the RF circuitry of the
rig will only cover slightly less. Use the dial or up/down
buttons to select the frequency and then press D/MR to
store it. The blinking "1" will increment.
VHF rx: 137.000 174.000
VHF tx: 137.000 174.000
(display will show blinking "1" and "300.000")
UHF rx: 410.000 470.000
UHF tx: 410.000 470.000
(Note:it is possible to set the RX limits wider than the
TX limits; for obvious reasons you cannot have the reverse
situation).
8) You can repeat step 7 above at any time if you need to
change the limits.
9) The pre-set repeater offsets are now no longer available
and you will have to set them up manually using the
instructions on page 16 of the manual. The Automatic
Repeater Shift (ARS) feature (also on page 16 of the
manual) will also have disappeared and you will have no way
of getting it back (except by changing the jumpers back).
To enable the crossband repeat, remove the link at
jumper spot 17. (Note, just below jumper spot 17 is a
separate jumper spot, not part of the group of twenty -
leave this alone).
Attributed:Hugo Cornwall
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Cross Band Repeater (5200)
Effect:enable crossband repeat
[ed - this is a continuation of the above]
1) You can enable the crossband repeater without altering the
frequency coverage. The only hardware alteration is the
removal of link 17.
2) To enable, turn on rig while holding down [RPT] button.
The rig is now a crossband repeater - you will get
confirmation of this from the display:the 100s position on
the two frequency displays will be replaced by a "R".
3) While in cross-band repeater mode you can change the
frequencies of each band.
4) The crossband repeater suffers from desense. It works
better at low power and even better if you use an external
diplexer and separate antennas. The more isolation between
the two bands, the better. As with all cross-band
repeaters, results will be poor if the UHF frequency is a
direct multiple of the VHF frequency. If you are planning
extended use of a crossband repeater, make extra sure that
the rig is adequately ventilated.
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[end of mod sheet Rev C]
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