| Author |
Message |
    
Audiophile73
Junior Member
Username: Audiophile73
Post Number: 29
Registered: 5-2004
| | Posted on Monday, January 10, 2005 - 2:13 am: | 
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I just bought a pc-78elite does anybody know the mods for it? |
Fusebreaker
Junior Member
Username: Fusebreaker
Post Number: 36
Registered: 3-2004
| | Posted on Thursday, May 26, 2005 - 3:56 pm: |
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I have never seen anything on this radio which is odd try changing the final to a 2sc1969 this will help a little bit |
Manenti
New member
Username: Manenti
Post Number: 1
Registered: 9-2006
| | Posted on Tuesday, July 17, 2007 - 10:38 pm: |
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I am looking for mod info on the Uniden PC78 Elite.I have searched the web and I cant find much on this radio.
I would like to lower the dead key for use with a amp.Does anyone have any suggestions? |
Bigbadjohn8
New member
Username: Bigbadjohn8
Post Number: 1
Registered: 6-2014
| | Posted on Thursday, July 03, 2014 - 8:04 pm: |
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remove JP36. its near the final.
solder a 220uF 25 volt electrolytic capacitor in its now empty holes. the negative lead of the cap goes toward the final. (back of radio)
now solder a 1/2 watt resistor to the leads of the cap. do this on the solder (green) side of the PC board, keeping the leads of the resistor very short, and using heat shrink tubing on it to prevent shorts.
just solder each lead of the resistor to one of the places where you soldered the cap to.
this would be considered "in parallel". just FYI
experiment with the value of the resistor to vary the deadkey. swing will always be the max the radio can do no matter what the deadkey is.
try a 10,22, or 33 ohm resistor to start with and see where that puts you.
i wouldnt go much below 2 watts, as it makes the radio sound funny. thats just my opinion.
put D11 back in the radio if you have removed it, and turn VR4 all the way up.
tune L14 for max PEP wattage, while saying "ahhh" into the mic. |
