Penrider
Junior Member Username: Penrider
Post Number: 45 Registered: 1-2007
| Posted on Thursday, March 08, 2007 - 7:35 pm: |
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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
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