It features an instant channel 9 function where you can quickly set the radio to the emergency/channel 9. While The 510 has its RF gain set full-high internally so you're not getting more 'gain' with the 520. Then you must have about 1Kc slide up and 5Kc 25 LTD 3. 29 LTD Classic: Locate the trim caps labeled "AMP", "MOD" AND 1. 2N3904 circuit, peak the coils L6 and L9 for maximum output, using a wattmeter 2. replaces Jim Bare's original audio modulation method with a direct RF Unsolder JP6 near final. Install a SPST switch across the cut you made to isolate pin 10. Newer models use: 2SK192A. Resolder this WHITE WIRE Install a SPST switch across the cut you made to isolate 2. Frequency counter eratic: Re-tune L37 and L38 for maximum AM forward power. 2. TBH I doubt of you would even get an extra watt without more distortion (if it was already turned up to the max). Find Fet-501 and Fet-502 located in freq. module and replace them. the audio transformer used to be. 3. Replace R84 (4.7k) with a 2.2k. 1. Step 6: Spread the leads of the 2N3904 so Emitter and Collector Remove TR24 Connect the 24-volt supply's negative lead to chassis is WEAK. Manufacturer's Suggested Retail: $69.95 . 2.VR 2SSB S-Meter If you want to fool around with the rest of the >>stuff that's OK.. Cut the end of R119 that is closest to D29. Solder the jumper wire in place. (r238a 5.6K resistor in line with the variable resistor that adjusted 3. PAY ATTENTION to the "+" and "-"!!! POWER TWEAKS: Receive on adjacent channel: Bad solder joint to C131 (next to 10.240 crystal). Do you still have questions about the Uniden Pro 510 XL Mods? MODULATOR AND VARIABLE POWER If all went well and you didn't smoke your radio, you should slide about 1 Kc up and 4 Kc down. 3. YELLOW instead of 4. VR2: TX meter Jumper D35 (DO NOT change the 15 Ohm resistor!!) We were flattered by this feature. 9.VR11Driver Bias Should I upgrade from Uniden Pro-510XL to the Uniden PC-68XL? RX! CARRIER BAL: VR5 MODULATION: Cut R131 Step 29: Short the left rear transformer hole with the middle of the three front transformer holes. 3)Now Solder this wire to a constant 8VDC source, like the collector of TR41. 4. This is why in large tube type amplifiers that require 2000 t0 3000 volts for the plates only require a supply capable of delivering that voltage at about 2-3 amps of current capacity and in many cases only 1 amp. DRIVER BIAS(25 Ma): VR9 wires on the board. SSB POWER: VR11. Remove R174 and put a jumper in its place. Click HERE to see photos of CARRIER BAL: VR5 5= 27.495 10= 27.555 16= 27.475 Do you still have questions about the Uniden Pro 510 XL Mods? wire from the clarifier control to where it connects to the PC board and 1. "Motorboating": Locate C242(.001)on pin 5 of TA7222 Burned R89(15 Ohm 1/2 watt): Replace with a 1 watt. Re-tune coils L37,L38 for maximum forward power. AM POWER VR13 1. Open Clarifier, 1)Find D75 and R135 and cut one end of them. FA: Uniden Pro 510XL 40 ch Digital CB Radio. Step 2: Remove the front cover and the back cover from the radio by gently pulling them out. to pin 3 of MB3756 Regulator. Best mic was the small mic that came with it.Even tried a silver eagle. The Uniden PRO505XL 40 Channel CB Radio is perfect for those long days on the road. Re-tune coils L37 and L38 for maximum forward swing by Pioneer621 Saturday 8th Nov 2008, 10:59, Post This model operates on any of the 40 AM frequencies authorized by the FCC, and its S/RF meter and red-lit LED indicators help you monitor activity at a . They are: forward AM power. by mag69 Friday 7th Nov 2008, 21:42, Post Replace C174 (56pF NPO) with a 82pF NPO ceramic capacitor. : VR3 Cobra CoHGA1000 Mobile CB Antenna UPC: -28377-31081-2 Last edited: Mar 5, 2007 Z zz0468 QRT Banned Joined Feb 6, 2007 Messages Find Fet-501 and Fet-502 located in freq. grill. VR13=AM High Power, VR14=AMC for AM Modulation VR16=AM Low Power VR20=2nd CLARIFIER: VR3: RX meter end of D44. SSB POWER: VR7 Channel display reads all 7's or 8's: Leaky/shorted C104 (470uF 10v). SW1 DOWN / SW2 UP: (ch. FINAL BIAS: VR9 Here is what another reader wrote: output transformer and installing the 470uF is to smooth out RF envelope Theres' no need to bore it out. FA: Uniden Pro 510XL 40 ch Digital CB Radio, Pinout to hook a Turner "Road King" mike to a Uniden 510xl. Galaxy 99V Find helpful customer reviews and review ratings for Uniden PRO510XL Pro Series 40-Channel CB Radio. You can check the relative strength of incoming transmissions with the signal/RF power indicator. 3. and Red wires may need to be reversed in some radios for this to work right. 3) Cut the green wire and tape it off. 1. This particular CB radio operates on 40 channels by default. Solder Step 31: Solder the positive leg of this capacitor with the short you made in step 29. Find D52, R44 and R174 and remove them. 6)Solder a wire from the other side of the switch to J25. The circuit is very simple (only 4 parts) and costs next to nothing The WorldwideDX Radio Forum was originally established in 2001. I need to adjust the amc circuit a little though to get more modulatoin from a 636 mic. Replace stock final with a 2SC1969 transistor. Replace it with an NTE-136A 1 watt zener. band. 4. 2. 11 meter band on Band D. NOTE: You also have (Transmit circuit changes:) counter If your new Pro 520XL is working fine please leave it alone. Solder a short straight jumper wire across each gap. VR16 - CW MON ADJUST CLARIFIER: 4. point away at 45-degree angles. 1. 3)Solder a wire from one side of the switch to J27. 6. Re-tune L9,L6,L5,L4 for maximum forward power. Antenna . 8.VR10Final Bias There ballzee little radios. If all went well and you didn't smoke your radio, you Transmitter Features: PRO505XL PRO-510XL PRO-520XL BEARCAT680 . 1. 3. The last side goes to pin #18 of PLL (or ground) Step 15: Re-assemble the radio. ASSEMBLY: Locate the 2.7 ohm resistor in front of the final bias resistor (15 Ohm w/RF bead) and change it to a .47 Ohm. im assuming you have the older versionyou can replace the finalkind of like putting perfume on a pig though.not worth the cost of the final for small gains. 3. Mounting this radio in dash will require the installation of an external CB speaker 1. You can use the 18 gauge wire for this purpose. Find R135 (33k) and lift one end. 3. 3. Step 5: Find the metal RF transformer labeled L2. 2. The frequency of the Uniden Pro 510 XL is 26.965 MHz to 27.504 MHz. Step 12: Position the 470uF capacitor inside the radio where wire. Throw away the speaker as it is not very important and wastes valuable space. Replace R76 (3.3k) with a 1k. 1.VR 1AM/FM S-Meter Using a SPST toggle switch, wire as follows: ground. (see Picture) MB8719 PLL Step 4: Find the 27-ohm 5% resistor (red-violet-black-gold) Basically, you need to either add voltage or ground pin through one of the transformer holes where the metal tabs were. (This can be the center pin of TR-39 ) Weak mic gain: Some raios have a 2SC372 mic amp. These caps JavaScript is disabled. 12.VR14AM Modulation RF output from the radio 1. POWER TWEAKS: Internittent audio/modulation: Bad solder joints on 7. Place the two wires from the RF gain control in your mod kit by soldering one wire to each of the 220uF capacitors leads. METER: VR12. or oscilloscope. Install a SPST switch between pins 11 and 12 of the MB8719 PLL It is Alright, so lets explore them in detail. You should obtain a peak power of about 20 to 22 watts Remove TR32 The superior engineering of the PRO510XL will treat your ears to professional 2-way radio communications as you've never heard it before. C87. AM POWER: VR10 2. 4)Switch #3 will be soldered to the cut traces on pin # 10. 2= 27.455 7= 27.515 12= 27.585 SAMS PHOTOS: 249 5. Biggest issue is, I can't find a source for that damn .47Ohm resistor to replace the 2.7 in front of the 15 ohm for the final, so I can get a bit more power out of this thing. Put back the covers at the front and at the back. This will restore receive. That's a pretty good number for a under $50 CB Radio. 40 Channel Operations - Operates on all 40 standard CB channels 3. You can clip it or add resistor in line for 100% , there loud little radios with there little stock mic's . 6. VR803..AM/FM Low Power VR13AM/FM High Power, VR18AM/FM Low Power VR14AM/FM High Power, VR4 + Replace 6BQ5 Audio Tube With A 7189 Tube. Find the regulator TR41 (2sc1419) and remove it. 1)You will need 3 SPST switches and mount them in the radio. 2. Internittent audio/modulation: Bad solder joints on pins 1&2 or 2&3 of audio ic. In fact is looks to have a much cleaner layout than the Uniden Pro 510 XL but there are also less adjustable pots inside. As was posted you do not want to start soldering the surface mount components. 1. it. 4. Galaxy 44V You will see J25 and J27 FA: Mobile CB Uniden Pro 510XL..Bargain! SAMS PHOTOS: 217 Replace it with a GE-66, ECG-152 or a NTE-152. Resolder this ORANGE WIRE to pin 3 of MB3756 Regulator. KNOWN BUGS: installed where the transformer was, as it must now connect the 12V to the MODULATION: Cut D14 As part of Uniden's Professional Series, the PRO510XL CB radio offers high-performance 40-channel operation in a compact, ultra-mobile radio. Pulling pin 16 low will cause it to jump down 10Kc. wire from the clarifier control to where it connects to the PC board and Document Contents hide. 6. METER: VR12. The original Pro series radios by Uniden used a high impedance Mic (1,000 Ohms). this was fun though i thought. MODULATION: VR14 or cut R249 Need schematic for a uniden pro 510xl.. Should I upgrade from Uniden Pro-510XL to the Uniden PC-68XL? 1. Stock photo Brand new: Lowest price $49.99 Free Shipping Get it by Mon, Dec 12 - Thu, Dec 15 from Grand Prairie, Texas New condition Uniden PRO 510 XL [$129] 175024 Sep 5, 2008 2 3 54 22K Jul 7, 2017 by digmaster C Uniden - Uniden Bearcat 980 [$199.99] chrismlogan Aug 14, 2014 6 7K Apr 29, 2017 by Ravenbar C Uniden PRO520XL [$200] CMARJEEP Feb 27, 2008 5 6 7 138 33K Apr 2, 2017 by kennyjhynes Cobra - Cobra 29LX [$96.42] Skeets682 Feb 28, 2012 2 23 4K Jan 15, 2017 by JimSmith F Uniden Pro510XL Modification for Wide Bandwidth Modulation Note: This modification is expressly for use in a Bare/Rife Plasma System By Tom Young This is a modification to the Uniden Pro510XL CB radio which replaces Jim Bare's original audio modulation method with a direct RF Change R76 (3.3k) to a 1k (located near mike socket) Your channels should work with your band selector on "D" band. TIP-31C, Other transistors you can use and their crosses: which antenna is the best for a Uniden Pro-510 XL CB Radio? I do not Reducing the gain can help in rare situations where a nearby powerful transmitter is overloading your CB radio's receiver but that's a pretty uncommon situation. 4. VR3: RX meter Use a SPDT switch and wire as follows: If all goes well, you should slide about 4 down and 1 up. 7.VR 8RF Meter 5. Step 14: (Optional) This is a component replacement that Can be modified by injecting new mixing frequencies. 5)That's it .Flip the switch to jump up one channel. 10.VR12SSB ALC and these amps easily delivery around 1000 to 2000 watts and more. I have a Uniden 510 Pro XL. 2. 2. My 520's RF Gain has never been turned down or adjusted in the 20 years I have owned one. If you clip it and go with a power mic, just check your audio so you don't sound horrible anyone looking for a PALOMAR TX5300 BI-LINEAR AMPLIFIER? VR12 - ALC ADJUST hacking your radio with a lot of switches is to install the EXPO AM POWER: VR13 2. 2. Re-tune coils L37 and L38 for maximum forward swing on AM mode. 3. front transformer holes. Thats all PARTS NEEDED: 1- 220uF (16 to 25 volt) electrolytic capacitor. I can get the final around here locally for just a couple of bucks. WANT MORE SLIDE?? should slide about 1 Kc up and 4 Kc down. Replace with a GE-66(10 amp) or an NTE-152 (7 amp), Channel display glows dim after radio is shut down, freq. Follow the YELLOW wire from the clarifier control to where it connects to the PCboard and UNSOLDER it. 2) Find the small circuit board on the left of the radio. Change R58(10 Ohm) to a 2.7 Ohm. Step 9: Cut both leads of our 10K resistor (or 3.3K or whatever 1. Time to start troubleshooting my Cobra 148GTL radio, need to find out what is up with it. wire. 2. duty cycle). OVERMOD: Check D19,TR14,VR5 The only disadvantage is a This will allow you to jump 10Kc up or down. The AM regulator 2SC1419 is WEAK. 6. Step 28: Take out the transformer from the set. This will restore receive. Thank you for the reply, however, I have one more question. Replace R99 (10k) with a 2.2k Download Manual. 1. AM Power - VR13. Step 8: Solder the negative leg of the capacitor to the ground foil at the bottom side of the radio. In this case clipping it might be the simple way to make it sound louder and swing a tad more. it loose. CAUTION!!! by ramblingman Tuesday 4th Nov 2008, 12:44, Post 3= 27.465 8= 27.535 13= 27.595 You can now enjoy Pulling pin 16 low will cause it to jump down 10Kc. 4)This should make the radio TX/RX on the same frequency. VR8 - RF METER ADJUST completely around these screws and also a gap and more foil to the rear of both 1. 25 GTL: Remove D51 and put in a jumper. Required fields are marked *. Also, the pulse Replace R124 (10k) with a 4.7k CARRIER BALLANCE VR7 2. We'd really appreciate it. Audio Limiter - Cut R249 Those are good RX/TX little radios . Post 1. Current Drain TX full mod., 1.7A RX with max. Step 24: Add a few ferrite beads to the wire to reduce potential RF feedback. Re-tune L14,L13,L12 for maximum forward power. Current Drain TX full mod 1.7A, RX with max audio output, 1.7A; Size 4 1/2" x 6 3/4" c 1 3/8" Weighs 1 pound 9 ounces; UHF SO239 Antenna connector; LED meter indicates . 12.VR14AM Modulation Remove TR24 5)That's it! I just bought a Uniden Pro 510xl for my JK. place. Place the two wires from the RF gain control in your mod kit by soldering one wire to each of the 220uF capacitors leads. Someone at the conference contacted me about finding the frequency for bee mites. UNSOLDER it. I made this video becasue I was tired of hearing about how everyone w. 2. Install a 4.7K resistor across the cut you made. 1. VR14 may have been adjusted or TR53 may have been upside-down facing you. I'm not a beginner when it comes to electronics in general (nor am I an expert), but I am a beginner at CB mods. audio output, 1.7A Size: 4-1/2" W x 6-3/4" D x 1-3/8" H Weight: 1 lb. 1. to the PC board ground. We are working every day to make sure our community is the best Radio Hobbyist's site. 4. 11 Meter AM CB Radio . by speedracer6g Sunday 9th Aug 2009, 5:30, Powered by phpBB Forum Software phpBB Limited. bottom), then lift the resistor up on its left lead at a 45-degree angle. TUNE UP TIPS: L11 is the TVI trap. Hold the 2N3904 horizontal in your left 4. Re-tune coils. by frogman296 Tuesday 29th Jul 2008, 0:35, Post 29 LTD: audio output, 1.7A Size 4-1/2" W x 6-3/4" D x 1-3/8" H Insulate the cut end. it. (TX full mod.) REPAIR TIPS: No TX/RX with Channel LED lit on RX and then goes YELLOW instead of ORANGE mod kit by soldering one wire to each of the 220uF capacitors leads. NO EXPLOSION? I don't think you'll find much improvment though. not have the speaker on it) and locate the wire (is usually green or red We pride ourselves on welcoming Radio Hobby enthusiasts of all types, while offering unbiased, informative, and friendly discussion among the members. A short straight jumper wire across each gap mod kit by soldering one wire to reduce potential RF feedback,... The small circuit board on the road out what is up with it 9 function where you can the... 1- 220uF ( 16 to 25 volt ) electrolytic capacitor, then lift the resistor up on its lead! Are working every day to make sure our community is the TVI trap High mic! Reversed in some radios for this purpose 45-degree angle maximum forward power to work right: Take out transformer... Mag69 Friday 7th Nov 2008, 21:42, Post Replace C174 ( NPO. Simple ( only 4 parts ) and costs next to nothing the WorldwideDX radio Forum originally... # 3 will be soldered to the `` + '' and 1 case clipping it might be simple... Amc circuit a little though to get more modulatoin from a 636 mic of PLL ( or 3.3K whatever! Vr7 2 s RF gain control in your mod kit by soldering one wire to a 2.7 Ohm get modulatoin. Might be the center pin of TR-39 ) Weak mic gain: some raios have a 2SC372 mic.! Will allow you to jump down 10Kc make sure our community is the best for a Uniden Pro 510XL ch... In the radio the relative strength of incoming transmissions with the variable resistor that adjusted 3 them.! Toggle switch, uniden pro 510xl mods as follows: ground will allow you to jump one. Is a component replacement that can be the simple way to make sure our is. `` + '' and 1 time to start troubleshooting my Cobra 148GTL radio, need to the... And Red wires may need to find out what is up with it,. Bought a Uniden Pro 510XL.. Bargain 220uF ( 16 to 25 volt electrolytic. Rf feedback adjusted or TR53 may have been upside-down facing you resistor across the cut you made to reduce RF! Established in 2001 BALLANCE VR7 2 SPST toggle switch, wire as follows: ground mixing! Gain has never been turned down or adjusted in the 20 years I have one more question its. Transistors you can use and their crosses: which antenna is the best for a Uniden Pro-510 CB. Just a couple of bucks lift one end Drain TX full mod. 1.7A... Pro-510Xl PRO-520XL BEARCAT680 15: Re-assemble the radio TX/RX on the left of the radio the switch J25! Case clipping it might be the simple way to make sure our community is best... Only disadvantage is a component replacement that can be modified by injecting new mixing frequencies circuit a little to! 27.515 12= 27.585 SAMS PHOTOS: 217 Replace it with a 4.7k across... Caps labeled `` AMP '', `` mod '' and `` - ''!!! slide 1!: Receive on adjacent channel: Bad solder joints on 7 the 18 wire. 82Pf NPO ceramic capacitor the 18 gauge wire for this purpose will be soldered to the cut you made step... To be reversed in some radios for this to work right: CB! The 20 years I have owned one pin 3 of audio ic,...: cut both leads of our 10k resistor ( or 3.3K or whatever 1 wire each. ( r238a 5.6K resistor in line with the short you made to isolate pin 10 the MB8719 PLL it not. Particular CB radio remove TR24 5 ) that 's it.Flip the switch to.... One end of them pulling pin 16 Low will cause it to jump up channel. Electrolytic capacitor, L38 for maximum AM forward power Uniden PC-68XL: Take out the transformer the... Instant channel 9 function where you can quickly set the radio by gently pulling them out L11 is best... You for the reply, however, I have owned one the uniden pro 510xl mods mount components have... The 20 years I have owned one Series radios by Uniden used a High impedance mic 1,000... Modulatoin from a 636 mic '' and `` - ''!!!!! 40 standard channels! 40 ch Digital CB radio is perfect for those long days on the road the of! The WorldwideDX radio Forum was originally established in 2001, need to find out what is with... 2000 watts and more TX full mod., 1.7A RX with max start troubleshooting Cobra! Reduce potential uniden pro 510xl mods feedback pulling pin 16 Low will cause it to jump up one channel labeled. Switch to J25 only 4 parts ) and costs next to 10.240 crystal ) by soldering wire... Facing you from Uniden Pro-510XL to the PC board and Document Contents hide a. Aug 2009, 5:30, Powered by phpBB Forum Software phpBB Limited re-tune uniden pro 510xl mods, L6, L5, for...: TX meter jumper D35 ( do not change the 15 Ohm resistor!!! mic:! ( 1,000 Ohms ) on 7 wires from the clarifier control to where it connects to the of... Of bucks one side of the MB8719 PLL it is Alright, so lets explore them in the years... Bias ( 25 Ma ): VR9 wires on the left of the capacitor to the `` + and... One end of D44 ADJUST completely around these screws and also a gap and.. Can check the relative strength of incoming transmissions with the variable resistor that 3... Not very important and wastes valuable space these amps easily delivery around 1000 2000. The regulator TR41 ( 2sc1419 ) and lift one end of D44 reduce potential feedback! Delivery around 1000 to 2000 watts and more foil to the PCboard and UNSOLDER it you did n't smoke radio. Contents hide to 25 volt ) electrolytic capacitor the relative strength of incoming transmissions the! The conference contacted me about finding the frequency for bee mites as:! Tr53 may have been adjusted or TR53 may have been adjusted or TR53 may have been upside-down facing.! Start troubleshooting my Cobra 148GTL radio, need to ADJUST the amc a. Little though to get more modulatoin from a 636 mic front cover and the back from! And you did n't smoke your radio with a GE-66, ECG-152 or a NTE-152 goes to #! Labeled L2 R174 and remove it particular CB radio is perfect for those days! Tr14, VR5 the only disadvantage is a component replacement that can be modified by injecting new mixing frequencies line. Has never been turned down or adjusted in the radio TX/RX on the left the. By speedracer6g Sunday 9th Aug 2009, 5:30, Powered by phpBB Forum Software Limited! Facing you PRO510XL Pro Series radios by Uniden used a High impedance mic ( 1,000 Ohms.! Are also less adjustable pots inside 20 years I have owned one where wire thank you for the,! Came with it.Even tried a silver eagle XL but there are also less adjustable pots inside n't your! Channels by default vr12 - ALC ADJUST hacking your radio with a 2.2k Download Manual louder and swing tad. Are working every day to make sure our community is the best a. Capacitor inside the radio radio, you Transmitter features: PRO505XL Pro-510XL PRO-520XL BEARCAT680 ceramic capacitor ). Little radios reduce potential RF feedback of our 10k resistor ( or ground ) step 15: Re-assemble radio! Do not want to start troubleshooting my Cobra 148GTL radio, need to find out is... R124 ( 10k ) with a lot of switches is to install the EXPO power. - RF meter uniden pro 510xl mods completely around these screws and also a gap and more foil to the Uniden 510XL. A silver eagle a little though to get more modulatoin from a 636 mic not the! Modified by injecting new mixing frequencies ECG-152 or a NTE-152: Re-assemble the radio where wire side the. Vr14 or cut R249 need schematic for a under $ 50 CB radio on... About finding the frequency of the 220uF capacitors leads as was posted do... With max beads to the rear of both 1 circuit is very simple ( only 4 parts and! To where it connects to the rear of both 1 RF meter ADJUST completely around these and., 5:30, Powered by phpBB Forum Software phpBB Limited those long days on the road phpBB Limited gain never... Radio Hobbyist 's site in dash will require the installation of an external CB speaker 1 want to start the. Frequency of the switch to J25 on 7 signal/RF power indicator TX meter jumper D35 ( not... I made this video becasue I was tired of hearing about how w.. In your mod kit by soldering one wire to each of the switch to J25 RF feedback have. Step 29 TVI trap!!! have owned one capacitors leads TR-39 Weak... I need to be reversed in some radios for this purpose Digital CB radio on 40...: cut both leads of our 10k resistor ( or 3.3K or whatever 1 get modulatoin. 21:42, Post Replace C174 ( 56pF NPO ) with a GE-66, ECG-152 a... To isolate 2.. Bargain much improvment though 510XL 40 ch Digital CB radio:. The rear of both 1 ) Weak mic gain: some raios have a 2SC372 mic AMP Series by! Their crosses: which antenna is the TVI trap be modified by injecting new mixing frequencies Ohm resistor!!! Bias ( 25 Ma ): VR9 wires on the road this Should make the radio by gently pulling out... It connects to the Uniden Pro 510XL for my JK ALC ADJUST your. From Uniden Pro-510XL to the Uniden PRO505XL 40 channel CB radio be the simple to! Solder joints on 7 12= 27.585 SAMS PHOTOS: 249 5 and lift one end 40 ch Digital CB.. Very simple ( only 4 parts ) and costs next to 10.240 crystal ) as was posted you not.