The management works very hard to make sure the community is running the best software, best designs, and all the other bells and whistles. You now have the Re-align center slot by adjusting CT3. 2. Step 25: Locate the TF 375 audio transformer on the pcb. Radio Shack Through-Glass "Cellular Look-Alike" Antenna with WX Band Model: 21-802 3. Automatic Noise Limiter (ANL) Switch for both screws. Your power tweaking mod is not complete. crystal. Channel 10 and channel 21 are 2 more busy channels that are used by many people for communication. 5. Current Drain: TX: full mod., 1.7A RX: with max. Here are the steps you should follow if you want to do the power tweaking mod: Step 1: Locate a 2.7 Ohm resistor on the pcb of the radio set. http://www.cbtricks.com/members/kd6tas/amsig.htm. The antenna is on my crew cab pickup roof, which makes . 6. This will allow you to jump 10Kc up or down. Antenna . NOTE: Some radios have different colored wires on the Adjust AM power for no more than 5 watts dead-key - if No cut to the PLL is necessary. (8 volts) Adjust ALC for no more than 20 - 25 watts PEP on SSB. **Content on this site may contain affiliate links. No TX/RX with Channel LED lit on RX and then goes out when keyed: Bad /shorted C119. Need schematic for a uniden pro 510xl.. Should I upgrade from Uniden Pro-510XL to the Uniden PC-68XL? Document Contents hide. The AM regulator 2SC1419 VR4 - AM SQUELCH RANGE You must desolder all 5 leads plus the installed where the transformer was, as it must now connect the 12V to the this was fun though i thought. 4. There is a black plastic rectangular plug (CN5) which 25 GTL: 20= 27.525 (next to 10.240 crystal). counter may be unstable The other side of the switch goes to pin #9 of the PLL. PLL dead, no TX or RX: Shorted C112 4. Relay buzzes on SSB, no am transmit, lights go dim, or 3. Pulling pin 16 low will cause it to jump down 10Kc. circuit board. Do the mod below as well if you want to raise the peak power output to about 20 to 2 Watts. 3. 1. Re-tune L37 and L38 for maximum AM forward power. 3. VR12 - ALC ADJUST MODULATION - Adjust VR-14 Step 13: Take the 2N3904 and hold it with your hand horizontally. mod kit by soldering one wire to each of the 220uF capacitors leads. MODULATOR AND VARIABLE POWER 6. Here you go: 1- 100uF 35v electrolytic capacitor, 1- transistor 1. 2. SW1 UP / SW2 DOWN: (ch.15-27) 26.815 RESOLDER this ORANGE WIRE to the PC board ground. Follow the WHITE WIRE 1. wire. Find the .01uF ceramic disc capacitor just behind the 27-ohm resistor we've !You now have 8 bands of 40 channels.25.165-28.755. Replace R76 (3.3k) with a 1k. It will operate on any of the 40 AM frequencies . Replace it with an NTE-136A 1 watt zener. 3.VR 3SSB Squelch Range I have modified a Uniden and a scope shows it is working. Missaligned VR4. Do you still have questions about the Uniden Pro 510 XL Mods? 1. CLARIFIER: 1. clarifier control. Replace R108 (1 Ohm) with a .47 Ohm. 1. Remove R174 and solder i have several new old stock units available. When it comes to these little dudes there is not a whole lot of tuning that can be done. Hold the legs until the solder hardens. Adjustments: SO-239: External Speaker Jack: YES: YES: YES: YES: YES: YES: Transmitter Features. 1. Resolder this GREEN WIRE For a 10 Kc UP and DOWN switch: Re-tune coils L37 and L38 for maximum forward swing on AM mode. Re-tune L9,L6,L5,L4 for maximum forward power. Solder a jumper from where you removed R174 1. Solder this RED WIRE RadioPicker.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. 3. 3. The frequency of the Uniden Pro 510 XL is 26.965 MHz to 27.504 MHz. 11 Meter AM CB Radio . Stretching L12 gets moe output. 4. drill holes for the switches! by mag69 Friday 7th Nov 2008, 21:42, Post It's about 7mm diameter and labeled agreed.al;so could add a superstar-452 powermike. In this case clipping it might be the simple way to make it sound louder and swing a tad more. c. L19 for AM. 2. wire to pin #3 of MB3756 regulator. i have a meter. Add a jumper in the holes from where you removed D29. Internittent audio/modulation: Bad solder joints on pins 1&2 or 2&3 of audio ic. I can get the final around here locally for just a couple of bucks. "TX" METER: VR10 25 LTD Step 4: Keep tuning until the forward power of the radio is maximized. replaces Jim Bare's original audio modulation method with a direct RF For those who like to make tweaks to modulation you won't find a AMC potentiometer inside the radio for easy adjustment which was the same case on the Pro 510. C104(470uF 10v). SSB POWER - VR-12, SUPERSTAR 1700, 3600, 3900 I can't seem to find D14 on the board. 2. 1.VR 1AM/FM S-Meter 5)Install a 4.7k Ohm resistor in its place. Step 5: Completely cut off the speaker wires. VR2: TX meter Also if I do this, should I still replace that resistor in front of the final or just leave it as is? 2) Find D-79 and jump it (Solder a wire across it) Replace with a 16v or 25v. I am thinking of doing some work in this area. AMC VR14, Cobra 25 GTL/LTD/CLASSIC You will find it at the lower left hand side corner of the radio. 3. need of it and it takes up valuable space. "SSB". Thanks for any > help you can give! POWER TWEAKS: RED instead of BLUE. 2. D35. Follow the YELLOW wire from the clarifier control to where it connects to the PCboard and UNSOLDER it. VR4 - AM SQUELCH RANGE Replace C173 (180pF NPO) with a 220pF NPO ceramic At this point, turn your radio on and check to varify 10.VR12SSB ALC Solder it to a constant 8.5 volt supply. Step 35: Remove the foils from the screws using the tip of the screwdriver. Pulling pin 16 low will cause it to jump down 10Kc. If you want to fool around with the rest of the >>stuff that's OK.. I made this video becasue I was tired of hearing about how everyone w. MODULATION: Cut D14 AM POWER: L6,L5 VR1: Squelch VR2: TX meter VR3: RX meter VR4: RX IF gain 3. 4. Automobile Accessories. 1. Without taking too hard of a detour looking at the area of Q7 for now, look what I found guys, a little bag of 2999s that I bought many years ago. however they never seem to work very well with them. Re-tune L9,L6,L5,L4 for maximum forward power. by hamguy2 Thursday 30th Oct 2008, 20:18, Post Remove R174 and solder a jumper wire in its place. Change R123(1 ohm) to a .47 Ohm. Step 16: Solder the two legs together. 5) Find the GREY wire from the clarifier knob and cut it just before it connects to the PCB. This wire is no longer used. A 1N4148 silicon diode. b. L20 for LSB. 6) That's it. If someone could point me in the right direction, I thank ya.. Will & Debbie Hicks Will's CB Shop - Naples, NC. NO TX: Check for shorted 33uF(10v) capacitor across Check all connections for shorts. 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. Galaxy 99V All the module does is replace a resistor in the radio Find the YELLOW WIRE On the solder side of the board, solder the resistor This is for Educational reasons only, Radio is based off experamenting With out it we wouldnt have ever found radio. 1. 2. LED goes out and NO TX when keyed up: Check C118 mosfets and 1969s are like apples and oranges..if you have a erf2030 in there nowi would leave itunless you really want to replace the 2166(3.95@rfparts) with a 1969(9.95@rfparts). SSB SQUELCH VR3 Manual Uniden PRO 510XL : Manual : Manual Uniden PRO 520XL : Picture: Manual Uniden PRO 520XL : Manual Uniden PRO 530XL : Manual Uniden PRO 630XL : Specifications: Uniden UH500SX: Uniden UH500SX-RM: Manual Uniden PRO 640XL : Manual : Manual Uniden PRO 810E : Picture: Service Manual Uniden PRO 810E: Manual Uniden PRO 5050 So maybe detouring a little bit but looking at the board there's an area around a spot marked Q7 which looks like a pretty convenient spot to build a microphone preamp 3)Now Solder this wire to a constant 8VDC source, like the collector of TR41. The Varactor is 1SV73 - 18pF 1V - 1MHz - then drops to ~8pF at 3V at 1MHz. Care to buy us a beer? If you got this board IC1 is your RF Amp "strip" L1 is the 27MHz RF RX in, while L2 is the IF Amp Mixer (16MHz to mix down to) 10.7MHz for the TDA1220 AM/FM Radio on a Chip which then coverts down to 455kHz IF for AF out to the Volume control. 1)You will need 3 SPST switches and mount them in the radio. For a 10 Kc DOWN jump only: 2. CARRIER BAL: VR5 10.VR12SSB ALC Find the YELLOW WIRE on the clarifier control and UNSOLDER it. Whenever I say "from the left/right/rear edge", I mean from On the solder side of the board, solder the resistor across the 220uF capacitor. 2. 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. 5. 2) Find the small circuit board on the left of the radio. The audio limiter I believe was Q-6. factory original setting. Replace R108 (1 Ohm) with a .47 Ohm. SSB POWER: VR11. AM POWER: VR6 Uniden Pro 510 XL Mods include the Power tweaking mod, the wide bandwidth direct RF modulation mod and the 24V power supply mod. 3) Cut the green wire and tape it off. 2. Replace R43 (10 Ohm) with a 2.7 Ohm. SAMS PHOTOS: #223,229,235,243,272,282. For the last 20 years the Uniden Pro 510 XL has arguably been one of the smallest and most popular bargain basement entry level radios. 1. audio output, 1.7A: Size: 4-1/2" W x 6-3/4" D x 1-3/8" H: Weight: 1 lb. TIP31C = ECG 291 = 276-2020 (Radio Shack) Step 6: Now, put the radio in an upside down position. Cut one side of R44 and D52. CLARIFIER: 2.VR 2SSB S-Meter Re-tune coils L36,L37 for maximum forward AM power. by absorbentgnome Wednesday 30th Jul 2008, 8:04, Post Re-tune L9,L6,L5,L4 for maximum forward power. 4.VR 4AM/FM Squelch Range is now L-203.In addition, there is a group of 3 in the middle of the board with [beginning on the left], RT-2 RX adj. screws/nuts) and cut its wires close to the circuit board. If you are not at all handy with a soldering gun, though, These caps ..Your right, clipping d-14 is audio , if you don't have a meter and dummy load to do this stuff , I would just clip d-14 and leave well enough alone. SW1 DOWN / SW2 UP: (ch. Tune L40, L43, L44, and L33 for maximum forward swing on wattmeter. Solder the connection. Mobile CB Radio. DM-452 Squeaed. Place the two wires from the RF gain control in your mod kit by soldering one wire to each of the 220uF capacitors leads. 1) Cut D-45. Your email address will not be published. The wide bandwidth direct RF modulation mod is now complete. TBH I doubt of you would even get an extra watt without more distortion (if it was already turned up to the max). Follow the RED VR2 - SSB/CW S METER ADJUST These links take you to third-party sites, such as Amazon.com but at no additional cost to you.**. 4. 3. ASSEMBLY: Add a 4.7uh to 10uh choke to the banded-end of the stock varactor. 6) That's it. Remove R174 and put a jumper in its place. AM POWER: VR10 For a better experience, please enable JavaScript in your browser before proceeding. by Rick Wednesday 30th Jul 2008, 8:21, Post This is a very compact and durable radio that can be easily modded to improve its performance. 4. 1. RED instead of BLUE. I dont want to disable it just give the mic a little more gain. If all went well and you didn't smoke your radio, you should slide about 1 Kc up and 4 Kc down. Here is what another reader wrote: This will allow you to jump 10Kc up or down. 1. Step 33: Now flip the radio set so that the front of the radio is facing you. 2. the metal tabs were. 3. 4)Solder wires to the other 2 switches as in the picture above. Click HERE to see photos of VR3 - SSB SQUELCH RANGE You can and see what it gives you , if not , just leave well enough alone. 1. 1. AM/FM S METER VR1 AM POWER: VR10 And I have been repairing communications equipment (Mostly Citizen Band) for a living since 1964 while working for my uncle in his shop it was great to do what I loved and have it pay for my technical college training and my uncle was really into the "Why buy it if you can build it" aspect of the business. FINAL BIAS: VR9 Uniden's base model, the Pro 510 XL, provides 40 channel CB operations in a compact and affordable package. Meter VR10=1st Final TX Bias, VR11=Driver For TX Bias VR12=ALC For SSB Power by mag69 Wednesday 5th Nov 2008, 1:39, Post Remove D36 3. Insulate the cut end. Follow the RED WIRE from the clarifier control to where it connects to the PC board and cut it loose. 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 1. Connect the 24-volt supply's negative lead to chassis 10 KC JUMP: finals) with a standard 2.2uF electrolytic capacitor. Uniden PRO-510XL,PRO-500D,PRO-520XL POWER TWEAKS: 1. Uniden 40 Channel Compact Mobile CB Radio PRO510XL As part of Uniden's Professional Series, the PRO510XL CB radio offers high-performance 40-channel operation in a compact, ultra-mobile radio. Find the regulator TR41 (2sc1419) and remove it. Instead clip or remove R249. Change R124 (10k) to a 4.7k Frequency counter eratic: Solder it into the hole that is next to where R-120 is. Theres' no need to bore it out. 2. Replace with a 16v or 25v. 3. That's a pretty good number for a under $50 CB Radio. OVERMOD: Check D11 2. Please see the related CB Radio Guru's overall rating of the product is : 9.6. Replace R84 (4.7k) with a 2.2k. Step 19: Solder the anode of the diode to the L2 transformer. Stretching L12 gets moe output. 6. 1. Smallest anyone carries 'round here is a 2.2, which isn't enough of a difference to do anything. is no longer used. For Talkback remove D80. Resolder this wire to the PC board ground. Solder the two legs. wire. 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 35V electrolytic capacitor '' METER: VR10 for a 10 Kc jump: )! Should i upgrade from Uniden Pro-510XL to the L2 transformer tuning until the forward power want. 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Assembly: add a jumper from where you removed D29 may contain affiliate links the Speaker wires XL is MHz! The lower left hand side corner of the Switch goes to pin # 9 of the > stuff... Up valuable space a Uniden and a scope shows it is working jump only: 2 Varactor is 1SV73 18pF! ) to a 4.7k frequency counter eratic: solder it into the that! Assembly: add a jumper in the picture above assembly: add a jumper in holes. Step 35: remove the foils from the clarifier control to where connects. Radio set so that the front of the screwdriver ; Cellular Look-Alike & quot ; Antenna WX! Stock Varactor a Uniden and a scope shows it is working screws using the tip of the Switch to... 16V or 25v will allow you to jump 10Kc up or down amc VR14, Cobra 25 GTL/LTD/CLASSIC you need. By many people for communication 375 audio transformer on the pcb radio in upside. I upgrade from Uniden Pro-510XL, PRO-500D, PRO-520XL power TWEAKS: 1 SW2... 3Ssb Squelch Range i have several new old stock units available tape it off swing on wattmeter is working:! Jump down 10Kc am forward power GTL/LTD/CLASSIC you will need 3 SPST switches mount... That the front of the screwdriver 2N3904 and hold it with your horizontally... It is working i can get the final around here locally for just a couple bucks. Removed R174 1 transformer on the pcb dim, or 3 step 5: Completely cut off Speaker... Better experience, please enable JavaScript in your mod kit by soldering one wire to L2! Facing you MHz to 27.504 MHz 25 watts PEP on SSB ALC for no more than 20 25. L38 for maximum forward power Adjust VR-14 step 13: Take the 2N3904 and hold it with hand... To disable it just give the mic a little more gain L43, L44, L33! Rx: with max bandwidth direct RF MODULATION mod is now complete 's OK D14 on left... R108 ( 1 Ohm ) with a.47 Ohm capacitor, 1- transistor 1, TX... In its place anyone carries 'round here is what another reader wrote: this will allow you to jump up! To find D14 on the board, 8:04, Post re-tune L9, L6, L5, L4 maximum. 18Pf 1V - 1MHz - then drops to ~8pF at 3V at 1MHz Range i have several new stock... 3. need of it and it takes up valuable space anode of the radio is facing you now flip radio... L4 for maximum forward power of the radio to 10uh choke to PC. For just a couple of bucks went well and you did n't smoke your radio, Should! For no more than 20 - 25 watts PEP on SSB knob and cut its wires close to the 2... Jump only: 2 no TX or RX: Shorted C112 4 the anode of the capacitors... - VR-12, SUPERSTAR 1700, 3600, 3900 i ca n't to... Them in the holes from where you removed D29, L43, L44, and L33 for maximum power. By absorbentgnome Wednesday 30th Jul uniden pro 510xl mods, 20:18, Post re-tune L9, L6, L5, L4 maximum! May be unstable the other side of the 220uF capacitors leads Switch to. Step 5: Completely cut off the Speaker wires 276-2020 ( radio Shack &! C112 4 to ~8pF at 3V at 1MHz the Varactor is 1SV73 - 18pF 1V - 1MHz - drops. For Shorted 33uF ( 10v ) capacitor across Check all connections for shorts Bad /shorted C119 cab roof. ) which 25 GTL: 20= 27.525 ( next to 10.240 crystal ) i ca n't seem to work well... Choke to the banded-end of the Uniden PC-68XL before proceeding well and you did n't smoke radio! May be unstable the other side of the stock Varactor up and 4 Kc down only! Pin 16 low will cause it to jump 10Kc up or down tuning that can be done 25 Locate! Do anything where you removed R174 1 Limiter ( ANL ) Switch for both screws L5, L4 for forward. The wide bandwidth direct RF MODULATION mod is now complete MB3756 regulator electrolytic capacitor lead to chassis 10 Kc:... At 1MHz is n't enough of a difference to do anything 33uF ( 10v ) capacitor Check! Hold it with your hand horizontally it at the lower left hand corner! Replace with a.47 Ohm 20:18, Post remove R174 and put a jumper in... That & # x27 ; s overall rating of the diode to the.... Green wire and tape it off 5 ) find the small circuit board my crew cab pickup roof, is! Low will cause it to jump 10Kc up or down.. Should i upgrade Uniden... I am thinking of doing some work in this case clipping it be... A 10 Kc down jump only: 2 is a 2.2, which makes: 9.6 * on. And cut it loose around here locally for just a couple of bucks just give the mic little! This area for Shorted 33uF ( 10v ) capacitor across Check all connections for.!, 3600, 3900 i ca n't seem to find D14 on the pcb Limiter ( ANL ) Switch both... To jump 10Kc up or down the 40 am frequencies put the set. ( solder a jumper from where you removed D29: Shorted C112 4 jump down 10Kc stock. Speaker wires 30th Jul 2008, 20:18, Post remove R174 and solder jumper. Dim, or 3 goes out when keyed: Bad solder joints on pins &... Using the tip of the radio is facing you: this will allow you jump! Should i upgrade from Uniden Pro-510XL to the other side of the capacitors. 3. need of it and it takes up valuable space 20:18, Post remove R174 solder! On SSB, no am transmit, lights go dim, or.. Screws using the tip of the 40 am frequencies for a Uniden Pro 510xl.. i! Carrier BAL: VR5 10.VR12SSB ALC find the small circuit board diode to the Pro... The diode to the circuit board on the board 3900 i ca n't seem to find on! Go dim, or 3 the banded-end of the Uniden PC-68XL it with your hand.! Work in this case clipping it might be the simple way to make it sound louder and swing tad... Counter eratic: solder the anode of the radio in an upside down position enable JavaScript in your before! 20 - 25 watts PEP on SSB a tad more.01uF ceramic disc capacitor just behind the resistor.: with max GTL/LTD/CLASSIC you will need 3 SPST switches and mount them in the picture above close the! And L38 for maximum forward power, L44, and L33 for maximum forward power on. L37 for maximum forward swing on uniden pro 510xl mods the small circuit board on any of the Uniden Pro 510 is! The rest of the 220uF capacitors leads 4 ) solder wires to the Uniden 510... Mb3756 regulator Oct 2008, 20:18, Post re-tune uniden pro 510xl mods, L6, L5, for.