    
Penrider
Junior Member
Username: Penrider
Post Number: 45
Registered: 1-2007
| | Posted on Thursday, March 08, 2007 - 7:35 pm: | 
|
You can use the SWR or Roger Beep for talk back from the front panel by removing
the wire from the connector on the main board and simply soldering it to the cathode of D78.
Do not cut or remove D78, just connect the wire from the function used to the side opposite the
band. Do not connect to the banded side! The green wire from CN607 to the main board plug is
roger beep, right behind the mike plug 3 inches, a 6 pin connector; black (ground on one end,
green (the RB signal control line we want) on the other end.If you use SWR function, go to plug
from CN608, just behind antenna output, two coax wires with a common ground.The hot opposite the
shield is the one you want to use for a transistor low, activated when SWR is lit on the LCD
display.Don't forget to open D115 to clean up the audio quality of your talk back.Do not replace
the zener D115 with a cap. or resistor or whatever like you have seen out there, just leave it
open.A few hundred pico farads here may slightly improve sound but it also affects receive and
PA audio, and I like the receive sound of my Ranger so I leave the D115 circuit open.....
I don't remember where I got this years ago(saved to disk since then)...I did it and it works very well, I used the R-beep button cuz I hate roger beeps...very clean talkback, no squeel with mic gain wide open and d-104 halfway...works best with external speaker...use whatever ohm resistor you want or variable pot inline between green wire and d78 for louder/quieter talkback....BTW, this Does disable whichever button you use for this mode(r-beep, swr, dim, etc)
Sean
CEF867
CVC81
|
