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FT767.MOD
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1980-01-01
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116 lines
FT767
I have had my Yaesu FT-767 modified by the service facility for three
things:
1. Memory battery circuitry. Previously the circuitry caused
unnecessary drain on the memory battery, resulting in shortened
battery life. There is a kit available for this modification,
which I ordered (free of charge). After reading the instructions
and not being able to even find the components involved, I took
the unit down to LA to the service facility.
2. Hum mod. I don't know anything about this mod. It was
performed while the unit was in for the previous mod.
3. DATA IN/OUT Jack audio control modification. This mod was
originated by me. Since I have had the unit, I had not used it
for packet because I could not defeat the audio from the speaker
in any way without rendering the audio from the DATA IN/OUT jack
unusable. This jack was supposed to provide direct connection to
the FM modulator and discriminator for packet. It obviously was
affected by the AF gain, external speaker disconnect, i.e., anything
which affected the audio at the built-in speaker. Examination of
the circuit diagram seemed to indicate the audio for this jack
came from the headphone circuit.
CONTINUED IN FILE FT767.2
FT767.1
yaesu ft-:767gx mods..
if you would like to get your ft-767 to transmitt anywhere that it
will receive just remove the covers and look on he top board just
below the shield ecovering the pc board99;)9:-53 a small white switch
in the center of the radio swith this switch to the other position
and it will
oe xx now transmit anywhre.. remember that it is illegal
to use outside the ham ban
s...
also if you want the ft-767 to transmitt out of the regular 2 meter
freq then all you have to do is o go throught the initialization proce
ss for installing the 2 meter module but insted of reseting with the
ky in the manual.. power up the rig while holding the ?offset? ?3?
key. the rig will tten rx and txoutside the regular ham band on 2.
--(by wa4daz - rob) &...N0KGX...GENE
FT767.2
When I submitted the unit for the previous mods, I asked about
the possibility of correcting this obvious design error. The
gentleman in charge took all the information, and said he would
advise. I got a call from the technician to clarify the requested
mod, and he advised he wouldn't be able to perform the mod without
factory authorization. After I was notified the unit was ready,
(about 2 months later), I went to pick it up. Along with the
unit was a note saying, "You were right. We hooked the unit up
to a TNC and confirmed the problem. I have reconnected this
jack so that output is independent of AF control. Output is
about 200 MV." which has proved to be more than adequate. The
note was signed by "Rick."
CONTINUED IN FILE FT767.3
FT767.3
I have run it into a Heath HD-4040,
HK-21, and MFJ 1278T, and it works like gangbusters. What a neat
machine! This one unit serves all my ham radio needs! I no longer
have to hook up my HT just to check into the local board. I now have
it hooked up to the MFJ 1278T, using one port for VHF/UHF into the
DATA IN/OUT jack, and the other port into the PATCH jack, and out
the AUDIO OUT jack, through a Super SCAF, (Switch Capacitor Audio
Filter), to the TNC.
I encouraged "Rick" to publish this mod as a factory-approved mod
and so far, I have not heard anything about it. If you seek this
mod, try to talk to "Rick" and ask for the DATA IN/OUT jack audio
control mod. It is well worth the effort. No, the mod was not
free, and yes, I think it should have been free, but it wasn't,
but the price was very reasonable, I think about $80 for the whole
shebang. 73 and GL.
Dennis N6KDS @ WA6YHJ-1, Livermore.
ft767.4
Some time ago, I read some requirement for help in order to interface
a YEASU CAT SYSTEM to a Computer.
Hereafter, what I'have done to drive an FT-767 with the RS232C of a
computer.
DB25S (Computer side) DIN6 (TRCVR side)
/----------------- 3 SI
2 TD -----/////-------
10K \ NPN 2N2484
V ou equi.
___
7 GND ------KKKKKKKKKKKKKKKKKKKKKKKKKKKKKKK:95
3 RD --------------- >-----//////------ 2 SO
4 RTS _ / 10K
5 CTS _ V
NPN 2N2484
/ ___ ou equi.
/
/ 10K
/
6 DSR _ 8 CD ________ 20 DTR _
This is wired directly on the DB25S connectocTmto suit your needs.
Remember to switch on the CAT first, and to switch it off at the end of
your instructions, if you have to operate manualy the rig later on.
Good luck. JP