| Author |
Message |
    
Buck
| | Posted on Monday, March 31, 2003 - 6:31 pm: | 
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Id like to put channels in and open the clarifier up on this radio....I want to use the existing switches on the radio for the channels....Anyone got the right way to do it???
Thanks
Buck |
Buck
| | Posted on Tuesday, April 01, 2003 - 5:41 pm: |
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Anyone? |
Dx431
| | Posted on Wednesday, April 02, 2003 - 1:45 am: |
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Buck, I found 2 different conversions.....
Frequency conversion by reprogramming the PLL pins
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Pull pin 10 of the PLL low to go up 64 channels and start another band.
All you have to do is use one of the switches (the tone switch is best) and re-wire it so that it controls pin 10 of the PLL, one side of the tone switch currently goes to earth (should be the common pin), the other side goes to C77 which is shunted across the audio path to cut off the high frequencies to reduce the tone, all you need to do is cut the wire that goes to C77 and run from the switch to pin 10 instead, when the switch is in the low tone position it will connect pin 10 with earth, which will make the radio go up be 640kHz (64 channels).
Re tune if needed
Frequency conversions by crystal changes
-----------------------------------------
(You need to change the crystal at location X3)
Quote
" 11.6908MHz gives 28.060MHz to 28.500Mhz (Ham 10 Meter) operation in Cobra/Uniden CB's that originally had 11.3258MHz in them "
You really just need 28.300 to 28.500 for voice, the lower part of the band is CW.
You can use a 11.4758MHz to get the high band, or a 11.1758MHz to get the low band instead if that is what you need.
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Hope this helps..
431 |
Weakeststation
| | Posted on Tuesday, April 01, 2003 - 10:01 pm: |
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http://www.radiomods.co.nz go to the pll section and you will see mods there for this radio... |
Buck
| | Posted on Wednesday, April 02, 2003 - 9:34 pm: |
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Thanks DX431 and weakeststation....Thats pretty much what I was looking for
Thanks
Buck |
Dx431
| | Posted on Thursday, April 03, 2003 - 2:01 am: |
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Let us know how it turns out......
431 |
Buck
| | Posted on Saturday, April 05, 2003 - 8:23 pm: |
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Is there a way to get .475 out of this radio???? The way I take it, the mod you posted will start at 27.675....or am I way off?
Buck |
Crafter
| | Posted on Sunday, April 06, 2003 - 3:21 pm: |
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The way I do mine they start at 27.455 and end at 28.045 for the uppers, lowers go down to 26.815 . Off the PLL only mb8719. |
Buck
| | Posted on Monday, April 07, 2003 - 5:41 pm: |
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Thats what Im looking for crafter.....Which pins besides pin 10 low did you use??
Thanks
Buck |
Buck
| | Posted on Wednesday, April 09, 2003 - 8:37 pm: |
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Ok I think I got it figured out. I am going to connect the high/low switch to pin 10 and I would like to connect the brt/dim switch to pins 11 and 12. Now can some one tell me how to remove the existing wires on the brt/dim switch so that I have the dim setting all the time. Also I would like to know which pins on the brt/dim switch to use???? there are six pins and I only 2.. Any one have any idea what im after or do I have everyone confused like me?????
Thanks
Buck |
307
| | Posted on Thursday, April 10, 2003 - 7:04 am: |
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Don't hack the radio. Just add 2 SPST switches on the rear of the radio. I hate hacking up a radio.
307 |
Buck
| | Posted on Thursday, April 10, 2003 - 8:06 am: |
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Thanks for the advise 307...I will do that. I might just get a short piece of thin angle iron and mount it to my desk. I could mount the switches to that instead of the 148....That way I wont have any holes in it either. I plan on using it only as a base.Thanks again for the suggestion 307
Buck |
Buck
| | Posted on Saturday, April 12, 2003 - 9:40 am: |
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How about a clarifier mod that will give me about 6Kc down???? I have seen mods that give up to 14Kc of slide but that is way too much for me... Id like to just be able to slide down between channels with a little extra to spare.
I did the channel mod and it works great!!!! I ran the wires through a small hole in the back of the radio and mounted the switches to a piece of aluminum angle which I mounted to my desk...No extra holes in the radio and its not all hacked up.
Thanks for everyones help on this project
Buck |
Dx431
| | Posted on Saturday, April 12, 2003 - 2:32 pm: |
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Buck, this is what I found.......
1 Cut R44
2 Cut D52
3 Solder a jumper wire across R 174 (or remove it and put a jumper in its place)
4 Remove red wire that comes from the Fine tune pot from the board and hook it to the + side of C84
5 Change R175 to a 1KOhm
This should give you the slide that you want.
Hope this helps.....
431 |
Buck
| | Posted on Sunday, April 13, 2003 - 8:57 am: |
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Thanks Jason for your help....I found one that gives me about 6Kc of slide each way. The first 3 steps are the same that you posted.
#4. follow the orange wire from the clarifier to the board and de-solder from board and solder to pin 3 of the MB3756 IC(IC4).
#5. Center the clarifier and adjust L22(lsb), L59(usb), and L23(am) for normal operation.
I dont have a freq counter so I just used my Titan as a listining guide and adjusted untill I sounded normal. I know its probably not the recommended way but it worked fine for a dirt poor farm boy.
Now on to another project...I seemed to have developed a cold solder joint in my titan so I will try to track that down today.
Thanks again
Buck |
Dx431
| | Posted on Sunday, April 13, 2003 - 2:31 pm: |
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Glad I could help.... |
Fusebreaker
Junior Member
Username: Fusebreaker
Post Number: 31
Registered: 3-2004
| | Posted on Tuesday, May 17, 2005 - 8:47 am: |
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check my post under 8719 conversion question |
