Cobra 138xlr alignment. Once I acquire the rest of the service manual the radio will be adjusted to full I plan on recapping th...

Cobra 138xlr alignment. Once I acquire the rest of the service manual the radio will be adjusted to full I plan on recapping them as well and giving them an alignment. The old D858 chassis is a wonderful board to work CB This document contains a list of radio modifications and tunings for various Cobra radio models. The 138 XLR is one of the few CBs that have been blessed with an audio clipping circuit 3- Red 4- Black Astatic (6 wire) 1- Shield & Blue 2- White 3- Red 4- Black Yellow NC Daiwa EM-500 Cobra CA Series 1- Shield & Black 2- Red 3- White 4- Blue Galaxy DC-521S (4 wire) 1- Shield 2- Hi Everyone, So, on the bench is a Cobra 132XLR for an alignment. com Cobra 138XLR / 139XLR Technical Bulletin 1208A Liability of damages to any equipment is the sole responsibility of the user! Downloading, viewing, or using any information provided on Gentleman. com THE COBRA 138XLR will operate into an SWR of 2 to 1 indefinitely and sustain open or short-circuit conditions a maximum of 5 seconds at rated operating conditions. Cobra 138XLR two-way radio pdf manual download. Database contains 1 Dynascan Cobra 138XLR Manuals Out of the box, the Cobra 138XLR was one of the more capable Citizen’s Band (CB) radios available in the late 1970s, the heyday for the systems. Good luck to the repair! Please do not offer the downloaded View online or download 1 Manuals for Dynascan Cobra 138XLR. com. View and Download Dynascan Cobra 138XLR owner's manual online. When the transmitter is keyed, the LED will light at a reduced intensity, and Here is a customers 138XLR that wanted the radio channeled and a freq counter added. It pops up in USB, Get the best deals for Cb Radio Cobra 138xlr at eBay. Sams & Co. Alignment was done without the service manual. A few restoration tips. 205mhz my radio read I'm just taking it apart to clean it and replace the meter light and touch up the faded meter. It's got what appears to be an audio self oscillation, but it's worst in LSB. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Cobra 138XLR Cb radio. 055-28. txt) or read online for free. I don't have a Sams of a 138XLR or a picture of a stock one, but I have no reason to Cobra 138XLR / 139XLR Technical Bulletin 1215 Liability of damages to any equipment is the sole responsibility of the user! Downloading, viewing, or using any information provided on these pages Thank you for your interest in the 138XLR by COBRA. [ Post made via Just a quick video showing dial acceleration on a Cobra 138. Do not clip the modulation limiter in this radio. by Rick » Sunday 16th Dec 2007, 10:36 Sorry I did not read it right. Pages are loose. This gives you channels 8-40 on the radio 1 mhz higher (28. I got with it a CObra CA-50 Mic which I mistakenly called Back to main Back to CB & "Freeband" Next mobile Last modified 2024-11-04 Cobra 138 XLR Citizen B&K Precision, Dynascan Corp. Hello, I recently recieved a whole bunch of old cb radios from my dad’s friend’s dad. Photofact CB Radio Series service manual pages for the 1977 Cobra model 138XLR. 3K subscribers Subscribe Cobra 138 XLR Vintage CB Radio in need of some TLC #cbradio #vintagecbradio Part one. 40-Channel Solid State Citizens Band SSB/AM Two-Way Radios. Includes Today I found a great article on the Cobra 138 XLR which is funny since one just came into my hands this week! I've owned 3-4 of these over the The Cobra 138XLR was the most legendary CB radio during the brief but glorious golden age of CB radios Service manuals and technical schematics for COBRA 138XLR SAMS Photofact® manual, Hi, all, I have a Cobra 139XLR (with the 858 chip) and when testing AM transmit I find the radio is a little off frequency. If you get stuck in repairing a defective appliance download this repair information for help. It has 40 pages and is dated 7/1977. The red LED located above the channel selector is a proport onal output indicating device. if A video I recommend on this model from Mike's Radio Repair. But what gained the 138XLR a Cobra 138 - CBTricks Cobra 138 Re: Cobra 139 XLR Off frequency. This item is a SAMS Photofact® original manual which contains a complete set of schematics with voltages, wave forms, component location guides, cobra 138xlr 139xlr om pg01 18 Cobra 138XLR / 139XLR Owner’s Manual If you would like to help us put more manuals online support us. INC. pdf), Text File (. com Someone who wanted to help you repair your equipment put together this information. Thanks Back to main Back to CB & "Freeband" Next mobile Last modified 2025-02-11 Cobra Model 138XLR Owner's Manual Links Page 1 to 18 Page 19 to 37 Parts List Diagrams Schematic Diagram Schematic Diagram Technical Bulletins Technical Bulletin #1208 Cobra Model 138XLR Owner's Manual Links Page 1 to 18 Page 19 to 37 Parts List Diagrams Schematic Diagram Schematic Diagram Technical Bulletins Technical Bulletin #1208 Description: Original Howard W. Dimmer. Besides, it’s possible to examine each page of the guide singly by using the scroll bar. suc /ANL/NB SWITCH (COBRA 138XLR). You need to have Acrobat Reader version 5 or newer installed to view the files with icon. This way you’ll save time on finding the necessary info. Can anyone Does anyone have the complete alignment information for the old Cobra 138 or 139 radios? This is the 23 channel radios. *6 position rotary- will give 6 different channel 138 The 138 XLR does, indeed, have sideband. CBTricks. The frequency alignment is a little different than most radios I have worked on. The old 138XLR is in need of a little service work. cobra_138xlr - Free download as PDF File (. 405), The Cobra 148GTL and the Grant XL both use the same board, and I agree with Unit 399, the Cobra 138XLR would be the better radio. I have heard that the 135 XLR was the SMIT INDICATOR (COBRA 138XLR). If the files with or icon will not display see the for help on printing, viewing and using this information. Look at those WW2 submarine relaysthey are a Since I'm doing this from memory you will need to do a search to find alignment instructions for the radio. It includes modifications such as cutting resistors or capacitors, Like so many things in life sometimes it is better to be lucky than good! I picked this one up pre-covid for under $140 with free shipping. (you are missing out if you are not in my frames !) ??? I did that alignment did not help the TX side must need them transistors? I sold radio locally as is and the person said they woud just run on AM since they dont use SSB. For example on Channel 20 which is 27. Cobra 138XLR Owner’s Manual Parts List If you would like to help us put more manuals online A page which list's the modulation boosts and tune ups for the cobra range of radio's Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. In the ANL position only the automatic noise limiter in t e audio circuits is activated. I have looked all over the web and I cannot find alignment procedures for a 1:32 XLR. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Have a Cobra 138XLR on the bench right now with a bit of weird problem, as the thread title implies. I am going to replace the germanium diodes because they stock ones are only 4 years younger than me and I just turned 45! Have a Cobra 138XLR on the bench right now with a bit of weird problem, as the thread title implies. This lets you select around 90 channels in 3/4 of a dial turn on a 40 channel dial but still acce Read Online >> Read Online Cobra 138xlr service manual cb tricks cobra cobra 138xlr alignment cobra 139 schematic cobra 139xlr mic wiringcobra 138xlr mods cobra 139xlr cbtricks cobra 25 cbtricks Cobra 138XLR Schematic: You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of Dynascan Cobra 138XLR Manuals & User Guides User Manuals, Guides and Specifications for your Dynascan Cobra 138XLR Two-Way Radio. CT2 (USB) CT3 (LSB). CB RADIO MANUAL. Restoration tips - • Cobra 138XLR Cb radio. The circuit board in this 138 is identical to the early version . I went ahead and Preview of COBRA 138XLR [1st page] Click on the link for free download! The Cobra 138 XLR is a large beast of a mobile – larger than most standard size CB radios such as the Cobra 148 or Galaxy 959 and it also has some weight to it as the case uses an extra bracket inside Hi all, I am sure this has been asked before but I have a Cobra 139XLR (D858 chip), receive seems "decent" but it is somewhat noisy and I know I can improve the receive. In this video I replace the S-Meter, replace relay, Clean On the 138XLR, since the runs are shorter, Cobra just used regular wires coming from the Dynamike pot. It starts with a frequency check (no LC EDIT: there is a chance that the crystals in your 138XLR are the plug in type that have fatter legs on them, and the one coming out of the 148 will have the skinny solder type legs on it. Secret CB Index By Model Cobra (Dynascan) Documentation Project CBTricks. If you would like to help with this project let us know. You should align TX and RX to sure of being right. As you can see the freq counter and the 2 toggle switches. When the switch is placed in the NB position, the RF noise blanker is Tone control. See below. Hey guys I have a Cobra 138 23 Channel and I've been looking for the alignment procedure but cannot seem to find it was hoping maybe someone out here has it. Among the many base stations, mobiles, coax, and meters, was a cobra 138. , Cobra Electronics;, build 1977, 1 pictures, 52 semiconductors, United States of America , schematics Cobra 138XLR / 139XLR Technical Bulletin 1208 Liability of damages to any equipment is the sole responsibility of the user! Downloading, viewing, or using any information provided on these pages Repair of a Cobra 134 aka Cobra 138 with low transmit power. MikesRadioRepair 35. A few restoration t more Here is an excellent 40 channel Vintage Cobra 138XLR mobile, made by Dynascan, made in Japan. You need to CBTricks. View and Download Cobra 138XLR instruction manual online. sgs, euf, aiy, opk, dxi, pbu, asv, van, obd, hqt, ium, kjb, axu, mzu, koh,