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PPR RBT1 tweak and peak

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All radio's are factory set up and although you can tweak parts, this is usually at the expense of longevity or reliability.
To tweak a radio properly and ensure it remains legal, you will need the service manual, an accurate frequency counter and standard, a nice dummy load and an oscilloscope. If you turn anything inside and do not know what you are doing, you could end up stressing output components due to signal mismatching and possibly end up with spurious transmissions which can interfere with other electronic equipment.

Posted on Jul 09, 2014


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SOURCE: how do I set the clock on my Ranger professional with Blue Tooth

Press dimmer switch 3 sec, then when first two digits (hour( of clock flashes set hour using Phone Volume switches. Press dimmer again to set minutes, then when done press Dimmer once more to activate the clock. It displays in military configuration (e.g., 1:30 PM will read as 1330 Hrs) See user manual page 8

Posted on Aug 29, 2009



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SOURCE: I have a cobra Bluetooth

Hi michael, my name is John. Welcome to FixYa. Check your antenna system. Check your SWR they will check it for free at Radio Shack. A good antenna is a magnet mount, you can put it on your trunk or cab, as long as nothing is blocking it. Have any more problems, let me know. Thanks for choosing FixYa....John

Posted on Nov 30, 2010


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SOURCE: Ranger PPR-RBT1; when I try


Posted on Dec 30, 2011

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Realistic trc-455 how to peak n tuneit

No matter what any of the Internet Wizards say, you can not get any more power out of a CB radio than about 4W on AM. The output transistors just will not provide that. Peaking a radio is difficult/impossible if you don't have the right equipment to do it. I repair gear all the time, and I have found the the guys with the Golden Screwdriver do more harm than good.

If you feel that your radio is not up to snuff, then take it to a GOOD local repair centre. Trying to do it yourself will cost you much more in the long run.

I repair comms equipment for a living, and I see more gear come through that someone has decided can put out more power with just a tweak or two than I can count. It can not be done on a stock radio. It takes a lot of modification to make it happen, requiring replacement of the output transistors and tuned circuits. My experience is that if the receiver is not quite up to spec, then adjustment may bring it in line, but a typical guy just doesn't have the equipment to do it. Listening by ear and twiddling things will not do it, and in the long run, will cost you more than it's was worth.

Jan 09, 2018 | Radio Communications

1 Answer

Connex 3300

The manual is only available for purchase. Sorry.

So, I can't tell you where the R240 is located. But here is a link to buy the manual. Or here for a "tune-up" manual.

Hope this helps.

Dec 10, 2007 | Radio Communications

1 Answer

11 hp carb setting

Hello Dennis,
That is not too much information to go on, but i'll take a shot. I am gonna guess that this is likely a Tecumseh engine, but even if not, usually the main jet (when adjustable) is about 1.5 turns out from the factory. I would start in that range, and if you can get it to start, you can tweak it by running the engine at full throttle and adjusting it out further till the RPM's go down. Twist it back in some till they peak again and it should be good. Hope that helps.

Feb 26, 2015 | Garden

1 Answer

If i have a 4 channel 2000 watt amp, can i use 1600 watt wires if i only have 2 subs hooked up to it?

Yes, you will be fine. 4 gauge power wire is sufficient for a couple of reasons, the primary one being that most of the companies that are boasting 2000 watts for a 4 channel amp are off brand "web-retail only" companies, and they severely over rate the power output of their amplifiers. Secondly the supposed 2000 watts is peak power and not rms power. Peak power means how much power that amp can put out during absolue climax of the music or during a tone burst. RMS power is how much that amp will put out continously to your speakers or in this case, your subs. If you look at the spec sheet of that amp, in all actuallity you're probably only getting 200-300 watts rms even bridged.

On a side note, if you really want to push your subs hard, you might want to consider getting a mono block or "class d" amplifier and use that 4 channel amp to push your surround speakers. Class d/mono block amps are specifically designed to push subwoofers and will give you the most efficient power out and the best heat dissipation to withstand the output required to drive subwoofers. You'll get better bass and also more adjustability to tweak the sound levels coming out of your subs. Hope that helps.

Apr 02, 2011 | Car Audio & Video

1 Answer

1987 uniden pro 510 xl

Wow, from what you are saying, you should not be messing with the insides of the radio. Finals, are not resistors, that are TRANSISTORS, and they do not have resistance values at all.

The final is the little black transistor attached to the heat sink at the back of the radio. You can't just change the final. there are other parts that need to be changed if you want to do a high power mod. Don't even mess with it. you don't need too.

Next, D14 is not the uniden model. thats what you mess with in a cobra. Don't cut d14 in that radio or you will prolly blow it up. The diode you want to cut out is D203. DON'T CUT IT!!, Just un solder one leg of the diode. You won't be over modulated. That will bring you modulation up and your peak watts. it will swing to maybe 15-20 watts peak. That alone with make the radio louder.

You really don't need to raise the dead key. With a lower dead key you have higher swing. Its all about the audio. 2 watts for dead key is fine. Thats what I run.

You cannot do any other peaking with out a meter. If you have a meter you can spread the 2 coils behind the large transformer a tiny bit until you have peak wattage. L201 and L202. but from reading what you said, you should probably leave them alone, you will gain only a watt or 2, and its not worth it if you mess it up.

To be honest with you, all you really need to do is unsolder one leg of D203. Make sure you pull the leg out, and make sure it is not touching anything so it will not short.

Now if you do this, and it splatters, you can always solder it back in, and then turn RT201 all the way to the right, I think. If you turn it all the way to the right, and there is not modulation, you just turn it all the way to the left.

Please don't mess with anything else or you will screw the radio up.

Mar 19, 2008 | Uniden PRO510XL 40-Channels Base CB Radio

1 Answer

Connex 3300

go to and look under radio inf and youll find all the info you need

Dec 10, 2007 | Radio Communications

1 Answer

Cobra 29 ltd night watch with sound tracker i want to convert it

Go to a CB shop and have them put in an "A" board. Then have them tweak & peak. Got mine done for $80.00.

Jun 04, 2007 | Cobra 29 LTD CB Radio

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