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Westwind
| | Posted on Tuesday, February 19, 2002 - 10:54 pm: | 
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Anyone know any mods for this radio?Also need peak and tune info....Thanks |
Westwind
| | Posted on Thursday, February 21, 2002 - 3:46 pm: |
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What's up?Is there no techs out there who know the answer to my question?Come on,I've stared to believe that the techs on this forum are some of the best out there.Don't disappoint me now...... |
Bullseye
| | Posted on Thursday, February 21, 2002 - 7:14 pm: |
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Westwind, Don't worry you can be sure if 181 or 307 have seen your post they are working on the answer. If they heve'nt well they do this for free in their spare time and it takes awhile for them to get to things occassionally. They are two of the best Techs. I have seen from an advice standpoint and I can personally vouch for 307's work. I have a Galaxy base he did work on and I could'nt be happier with it. So don't despair. If one of those guys can't help someone here can. You may have to post in the open forum to get some one else to see it but someone here can and will help. I wish I could but I can only spell Tech. Thats as close as I get to being one. |
Triplecguy
| | Posted on Thursday, February 21, 2002 - 8:40 pm: |
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The mods for the that radio are not worth the money it costs to do them, I have one too, and it is an excellent radio, but to get any extra channels you have to buy an expo board and have a very experienced tech install it. Then, you only get one band higher. The board plus the install fee will be more than $100. Go ahead and peak and tune it, but if you want to do all the other mods, you should buy a different radio. I spent weeks trying to find out how I could get more bands out of mine, and I couldn't even find the expo board that I needed, they stopped making them or something like that, and then I asked one of the techs here on the forum about installing it and he said it was very hard. Sorry that the news isn't better, but that radio is still an excellent piece of equipment, it just can't have much done to it. Good look.
Big Dan |
Warlock
| | Posted on Thursday, February 21, 2002 - 9:43 pm: |
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A basic P&T is enough for a 68. If you want more channels it would be wiser to buy a radio made with them. Believe me, been there, done that, wasn't worth the $ and effort. |
Westwind
| | Posted on Friday, February 22, 2002 - 8:00 pm: |
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I've got a radio with the extra channels.What I was looking for(and I should have been alittle more detailed in my post-sorry)was how to tune it.(need pot numbers)And a way to get enough modulation to make it sound good.I use this radio as a backup so I don't use it alot.But when I do use it I'd like for it to sound good.Thanks for all of the help all of you have offered. |
Triplecguy
| | Posted on Friday, February 22, 2002 - 10:45 pm: |
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On the same subject, I would appreciate the same info Westwind is looking for. I have never gotten anything but excellent reports from my 68 in stock form, I would love to see it tuned up!!
Do you think you could provide pictures by any chance?? I'm a quasi-newbie and pictures really help.
Thanx a lot
Big Dan |
Tech181
| | Posted on Saturday, February 23, 2002 - 1:12 am: |
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Westwind,
Sorry this took so long. I looked everywhere, all my printed resources, the internet, even other forums, and can find nothing. Sorry.
Steve
Tech181
Tech181@copperelectronics.com |
Warlock
| | Posted on Saturday, February 23, 2002 - 9:18 am: |
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West wind and triple C:
If you want to do a basic tune, adjust vr 5 for 100% modulation, adjust the tuning tower near the final (L13 I think) for max forward power. The tower is a brown waxy plastic looking cylinder with a black threaded slug inside and is just right of the final transistor. The final txr is mounted on the rear wall of the radio in the left rear quadrant.
If you intend to run a small amp with the radio, there is much more to the tuning than this to match the radio to the amp.
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Westwind
| | Posted on Sunday, February 24, 2002 - 12:03 am: |
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I found this mod. for extra channels.I'm not sure if it works because I have'nt had time to try it.
Suposely it only works on the Uniden PC68XL with pll chip 2816 and only on radio's made in the phillipines.
Connect pin number 9 of pll chip 2816 to -Ground
this will drop the freq. down 40 channels below 1 26.965.Put a on/off switch so that you can switch
between the new freq. and the freq. you have now.
BUT FIRST U MUST BE SURE THAT U CONNECT THAT GROUND WIRE TO THE RIGHT PIN(9).There is a mark on the 2816 chip,it's a dot.The mark on the chip tells you that pin number 1 starts their.Then count the pins(1,2,3,4,5,6,7,8,9)PIN 9 IS ON IT'S OWN,THERE IS NO CIRCUIT TRACK GOING TO THAT PIN.
WHEN FINISHED CHECK AND RECHECK YOUR WORK.MAKE SURE YOU ARE CONNECTED TO PIN 9 BEFORE TURNING ON POWER.
I got this mod. from a gentleman from New Zealand.I was looking for info. on this radio and ran across the web site.I wrote this just like I recieved it in my e-mail.Word for word.Like I said before"I don't know if it works" Look it over,try it out and let me know what happens.I might try it and if I do I'll post the results........Later..Westwind$#@^%@&#$
Warlock let me know what you think of this....... |
Warlock
| | Posted on Sunday, February 24, 2002 - 1:04 am: |
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Everytime I've done channel expansion on these type radios it was fairly worthless. The power and receive drops off so much or the frequency flutters or both. I really wouldn't bother, but you can try as I did. |
Westwind
| | Posted on Sunday, February 24, 2002 - 2:21 pm: |
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No,I think I'll take your advice.Like I said before this is a backup radio and I think I'll tune it and enjoy it as is.From what you say it's better to leave it as is.These radio's where not intended to be that good anyway.I've had this radio about 2 and half years and the cover had never been opened until the other day.Maybe I'll try to find a used radio some where and see if I can modify it.I'm just practicing and learning.Any ideas on where to look for used radio's?
Warlock,Thanks for your quick response's...
Westwindwizard/Later........... |
Warlock
| | Posted on Sunday, February 24, 2002 - 10:36 pm: |
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Check yard sales. Man can you run into some radio treasures for pennies on the dollar. |
Barakuda318
| | Posted on Tuesday, March 12, 2002 - 12:58 pm: |
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If you look where L10 is in the picture, to the rear is the final transistor. By the left sink wall you will see a wire jumper that runs front to back. Desolder and remove that wire. In it's place install a 470uf 25v capacitor with the negative side towards the final.
On the solder side install a 1/2w 100ohm resistor on the two points of the installed cap.
Hook up and adjust vr 5 for max modulation. Adjust L13, 10, 9, and 8 for maximum carrier, do so gently and slowly. Go back to each of the L's and tune them for maximum audio. Each should only have to ba adjusted very little. You may have to do this up to 3 times to get proper audio peak. Do so with "auuuu" not a whistle.
When this is done go back and check what your carrier is. It should be between 1w and 1.75. If it is higher, lessen the 100ohm resistor to around 75, if it is below a watt, raise the resistor to about 125. If you have to change the resistor you will have to repeat the tuning process entirely.
I have done this with success in many 29/25/66/76/68/78 radios leaving the limiter intact. You get around 1.5w carrier and about 16-20w peak with clean loud audio. This should help, I performed this mod and it worked absolutely great a smokin little 68xl gotta love uniden! email me for the picture diagram makes it much easier. hope this helps
73's
Barakuda318 (e-mail)ilovewistkp@aol.com |
Westwind
| | Posted on Saturday, March 16, 2002 - 12:28 am: |
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Barakuda318-I tried to e-mail you and it said you where not accepting e-mails.What's up?I'd like to get that picture and there's acouple questions I'd like to ask you.E-mail me at westwindwizard@aol.com and let me know if you'll accept my e-mail........Thanks |
Warlock
| | Posted on Saturday, March 16, 2002 - 8:33 am: |
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It is the opposite. If you have a carrier too high, install a larger resistor, if carrier is too low, install a smaller resistor. |
Jdchet
| | Posted on Monday, April 01, 2002 - 4:22 pm: |
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If you want a cool radio the same size as a PC 68 with a gazillion channels, buy a Titan Road Pro RPSY-485! The channel mod is easy and you get over 400 channels AM,FM,LSB,USB! The stock mike is pretty cheesy looking, but I talk all over the place with it! The best part is you can get this radio for under $90 on E-bay brand New! |
Dawg
| | Posted on Saturday, April 27, 2002 - 3:01 am: |
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I have a PC68LTW that Warlock just put a spell on, and I will testify that he can conjure up one righteous radio! A little over one watt dead key and swinging around twenty,sounds great "barefoot" and the KL200P makes it even better.Anybody think a power mic would help out the combo or would it be just a small gain? I don't have much background noise in the truck so I am not really worried about noise cancelling. Thanks for the magic Warlock! Dawg |
Barakuda318
| | Posted on Sunday, April 28, 2002 - 3:18 pm: |
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I believe that a power mic will do some justice, if anything they pick up your voice much better than a stock mic and you don't have to worry about modulation being to weak if you accidentally have your mic to far away from your mouth, on a scope they don't improve much but in the real world the recieving end is greatly appreciative of a power mic, lots louder.....jmho
73's |
Warlock
| | Posted on Sunday, April 28, 2002 - 10:19 pm: |
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You're very welcome Dawg.
318 you need to understand the radio he has as set up would be no "louder" with a power mike. He may decide to run a power mike turned down low for it's fidelity characteristics, but the modulation would not increase his voice volume over what he has currently. |
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