TM702

Original from IK6SBE to MODS@WW

KENWOOD TM702 -> 9600 BAUD

                           TRADUCTION BY IK6SBE

The following description refers to the modification  of RTX double band
KENWOOD TM702E with the pourpose of enabling the operation  at 9600 Baud
with the use of modem G3RUH.
The radio functions very well and herebelow the details.
Please  note  that i have  made  the  necessary  connections on the main
grid, souldering side, on minus of the PTT.
For  the  reception  i have connected the audio plug for the  two meters
directly on the PIN 12 of IC 11, and for the 70cm directly on the PIN 12
of IC 3.
For the trasmission on 2 meters  i made the contact between the resistor
SMD R70 of value 0  and the  trimmer  VR4 while  for the 70cm i made the
contact between the resistor SMD R67 with value 10K and the trimmer VR3.
I souldered the plug on  PTT directly on the back of the microphone plug
on  PIN 2.
For the  connections i have used earthed 5 poles cable and earthed it on
the  MIC AMP earth, thus on PIN 1 but earthing can be done anyhow.
Initially i have tried to keep together the connections of the two bands
thus using the same conductor for the  RX of the the 2 meters and the RX
of the 70 cm as well for the TX.
However i have obtained etter results during transmission with  separate
connections. This explains  the  use  of  5 poles cables. Eventually the
afore  mentioned  cable was  been inserted through  the same hole of the
power supply cable.
Of course i have removed the cut protection rubber on the hole.
For the utilization of one band or the other , i commute the connections
from the radio at the inlet of the modem in the TNC. That is all.
I remain at your disposal for further clarification.
Ciao from Lino ik3ngu@i3xty of Treviso

PACKET ADDRESS: IK6SBE@IW6BET.AN.ITA.EU  [TPK_1.81 FWD] :[
TCP/IP ADDRESS: [44.134.240.27]                         :[