| Author |
Message |
    
Ballwrecker
Junior Member
Username: Ballwrecker
Post Number: 22
Registered: 7-2007
| | Posted on Friday, November 30, 2007 - 7:08 pm: | 
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Hi guys, anybody know where to find this resistor in the 2970dx model... I saw somewhere it was D 67 i think.. But i cant find it anywhere. |
Captian_radio
Intermediate Member
Username: Captian_radio
Post Number: 279
Registered: 9-2004
| | Posted on Friday, November 30, 2007 - 10:18 pm: |
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D67 would usually denote a diode, could you mean R67 which would mean a resistor
Robert L. Spicer The days of radio are just beginning!
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Tech808
Moderator
Username: Tech808
Post Number: 14753
Registered: 8-2002
| | Posted on Friday, November 30, 2007 - 10:50 pm: |
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Ballwrecker,
Removing D78 will give you a LOW level talkback, and personally not worth the trouble.
Older radios it is a small resistor, newer is SMT.
I have the information listed in:
Ask The Tech
» Radio's Base
» 2995DX ECHO & TALK BACK
Or do a SEARCH here in the Copper Forum for: D67 and start reading.
It is NOT easy to find!
Lon~Tech808
CEF#808~HAM#001
CVC#002
Tech808@copperelectronics.com
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Ballwrecker
Junior Member
Username: Ballwrecker
Post Number: 23
Registered: 7-2007
| | Posted on Saturday, December 01, 2007 - 1:43 pm: |
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Well, if thats not the good way to add talkback by clipping/removing D67 then what would be a better way to add talkback? I kinda need it cause im adding an LT-2 echo board to the radio. Also, any hints of where D67 is located on the board front,back,left,right ??? I also looked thur the search area before posting and tried yahoo and google. Thanks for all your help ! jay |
Tech858
Moderator
Username: Tech858
Post Number: 72
Registered: 10-2007
| | Posted on Saturday, December 01, 2007 - 5:24 pm: |
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Don't know where you got your info from but I have just looked a schematic for the 2970dx , DO NOT REMOVE D67 !!! it is a varactor diode vital to the VCO circuitry and without it the radio will be dead on TX\RX double check to see if it was R67 you are supposed to remove .
Tech858/Jim
MM0TXO
CEF#858
HAM#230
CVC#116
Wavin' a hand at ya' fae Scotland 
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Tech808
Moderator
Username: Tech808
Post Number: 14760
Registered: 8-2002
| | Posted on Saturday, December 01, 2007 - 6:49 pm: |
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OOPS my mistake sorry, Jim is correct. 
From the 2003 Ranger Tech Tips it is D78. 
www.rangerusa.com/techtips.html
Lon~Tech808
CEF#808~HAM#001
CVC#002
Tech808@copperelectronics.com
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Ballwrecker
Junior Member
Username: Ballwrecker
Post Number: 24
Registered: 7-2007
| | Posted on Saturday, December 01, 2007 - 7:19 pm: |
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January Tech Tip of the Month: Want to add talk back to the RCI-2985DX & 2995DX? Man, is this one easy! Just remove D67 from the circuit. You can even wire in a SPST switch so that you can turn it on & off when desired......... so which is it D78 or D67( as per the ranger site) ???? Is there any other or better ways to add talkback to this radio. ?? I just tried putting the LT-2 board in the radio, and its sqealing bad. So i think i might have cut the wrong wires to the mic.. I thought it was the white one... oh well, ill figure that out... Oh BTW. i didnt realize that the 2995 base was the same as the 2970 mobile, excuse my ignorance but il learn as I go. |
