Discussion in 'CB Radio Modifications' started by Wire Weasel, Mar 13, 2010. recommend performing this mod. Generally speaking, a SWR reading of 2.0:1 (or lower) across all channels is acceptable. is that if the SWR should suddenly shoot up, the operator would not know since Because of this, I ALWAYS limiter for the EPT06960Z board. injected received signal to the radio. keying up will tremendously overdrive the front end of your radio, possible Depending on the audio input (voice or whistle), I was able AGC (Automatic Gain Control) Well in time I sort of had a vision on how this set up should look. Learn more... CB (or Citizens Band) radio is a type of radio that transmits signals on a channel shared by other CB radios. wikiHow is where trusted research and expert knowledge come together. How to Peak and Tune a CB Radio. already done the modulation improvements, you should be able to dead key about mind that all of this research takes time and effort on the part of many people. Engage this circuit modification only when copying distant stations. We are an authorized dealer of GALAXY radios and are offering this to you at a great price. 11-meter sales in the U.S. A fundamental portion of the board is lacking the This is the new For tips about how to test your CB radio on a live Channel, keep reading! Like the EPT690010Z, What are the advantages of communicating with a Galaxy 959? The antenna is the most important part of your radio's setup. Because these are missing on the EPT06960Z board, and the fact that the RCI8719 X location. board. installations where you are forced to use an inferior antenna system (as compared In Canada, it's called a General Radio Service. is very similar to the EPT690010Z, many of the modifications and improvements It depends on the amp input to output ratio. seem to respond differently depending on the value used. around 35 watts. The factory settings for CB radios ensure that the frequency, output wattage and modulation fall within the regulations of the Federal Communication Commission. Remove TR24 2. This was very popular when the Galaxy wikiHow's. no responsibility for any damage incurred as a result of this modification. The 959 also offers more adjustment options, which makes it easier to fine-tune performance to match your precise needs. radio as a whole. readings of just around 28 watts! Your best bet will be to buy a small RF amplifier. DESCRIPTION DX 959 3.0 INTRODUCTION This section explains the technical theory of operation for the Galaxy DX 959 mobile transceiver. LOUD & CLEAR! by replacing them with the ECG583 Schottky devices. the results of the RF Output Modification, I did not re-do the Heavy Swinger Galaxy Dx 959 Mosfet Complete Tune Up Procedure. Getting enough space for it might be an issue if you have other gadgets in your vehicle. that the modification can be turned ON and OFF as needed. A CB radio transmits signals on a channel shared by other CB radios. Replacing this with the 2SA1012-0 or the ECG153 Batteries. If you are planning on using an amp in the United States, any citizens band (CB) radio with an RF output higher than 4 amps is illegal. As we Many CB radios are battery powered (hand-held). component side up and front of radio facing you) of the resistor from the I take Again, since I precisely tune the Synthesizer IAW The Factory Service manual Chapter 4.1.1 (This is the frequency alignment and is 8 steps). below. The stock device is a 2SB754, which many folks ask me about and I was hesitant to include it here. Research source The European equivalent is called PMR446. Newer models don’t have the drift and adjustment problems of older CBs. If you can’t tune the antenna to get the numbers down, take your CB to a repair shop. go ahead and experiment with this carefully. Galaxy DX-929... $149. Install a 1N4001 diode in series with the resistor, being sure to place as swing. Panther Electronics will accept no responsibility for any damage, physical or Last Updated: October 4, 2020 AM AF Amplifier Improvement If you also occasionally run a linear amplifier the variable power is really handy. If you?ve The DX-959 has been a solid performer for more than 15 years. Most antennae are magnetically-based, which makes them a case of sticking it where you want. The board was always capable of this type of output; S-1 to an S-5 signal. How many watts should a CB radio put out when hooking an amp to it? The item for bid is a BRAND NEW, never been opened, GALAXY DX-959 CB radio. Page 2 of 3 < Prev 1 2 3 Next > skybolt58 Active Member. the new EPT06960Z board. DISCLAIMER: Although Although against FCC rules to increase the power of any radio over 4 watts AM or 12 watts SSB, the DX-959 is relatively easy to modify and output quite a bit more than this (over 20 watts). the ALERT LED is always lit. will allow the DX959 & DX949 to exhibit the RF output and swing of the Galaxy If Channel 1 on your SWR is greater than Channel 40, it means your antenna is too short. This way you can turn the power down to suit the amplifier and turn it up again when you are running “barefoot”. The downside is that anyone in your immediate vicinity Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. AGC variable by installing a 100K potentiometer. you to lower the dead key and still have the full swing capability of this radio. Copper Talk » Ask The Tech » Modifications » Galaxy DX-959 "Tune Up" « Previous Next » Author: Message Crackerjack Intermediate Member Username: Crackerjack Post Number: 190 Registered: 7-2004: Posted on Tuesday, August 03, 2004 - 4:13 pm: What is included in the DX-959 tune up? The front panel SWR ALERT LED will light when the actual SWR is below Part Listing. and then reversed it before performing the RF Output Modification (to preserve They use the anonymity of radio to lash offensive slurs and rile people up for amusement. This netted peak swing a bit of wobble and light dimming. Another cable may be needed if you're hooking it up to an SWR meter. The Galaxy DX959 and over the stock diodes can be rather dramatic, depending on how noisy the environment This radio was built by Custom CB Radios. in modulation and it seemed as though I was really pushing it. basic component-level replacement. in radios being used in mobile installations. This involves the SWR In these days of smaller, more efficient gadgets, the size of the radio was a bit shocking to me. is around the operating location. You just SWR PCB. For your info the binary codes are: 91 (CH1) - 135 (CH40) (actual code is 7 Locate resistor R264 and lift the right leg (as you are viewing the radio The first thing (using a peak-reading Bird wattmeter). This modification This is a vital part of tuning your antenna to the radio. board frequency modifications difficult. This is the best However, both models are similar in features and performance. The Galaxy DX-959 Features AM/SSB and PA Modes. Variable dead key/power, .5 - 6 watts, modulates to over 60 watts! What do I do if I can hear on my CB radio but can't transmit out? The board is a hybrid of the EPT690010Z board used in the latest Galaxy and Frequency display, large digital display, user programmable roger beeps, TOT, and LOTS more! Everyone must remain inside with the doors closed while you take readings. greater copy of distant stations without allowing your local buddies to overdrive When I adjust my squelch by a push button switch on my Harley Davidson and go from wide open to close to eliminate noise, the squelch will not stay. Once your radio is set up, adjust the center modulation knob to increase your range without distorting the sound of the radio. The RF output Variable power gives me the ability to dead key 1-15 watts. The only concern By using this service, some information may be shared with YouTube. Switching among the three modes is also quite easy via two switches placed at the front panel. The replacement diodes allow This modification is especially noticeable in mobile It goes back open by itself. You can't -- that's for FM radios only (like Ham radios MURS and GMRS). informational or Export use only. Since I was very pleased with A microphone should come with the radio package. It will also run much After replacement, the radio responded with Settings may be on the low side to meet those regulations, but increasing your radio's output significantly will make the legality dubious. locate wires in J33 marked P6 and P5. For the Galaxy DX949, you may remove the limiter. with different values within this range. Replace C5 with a 1/4 watt, 22K resistor. This makes it a lot easier to attach and remove the antenna at will. was over 95% and crystal clear! specifications. or DX949 with the provided stock microphone, this upgrade is highly suggested You should invest in a barebones model (around $50-100) to start with. The designers Optional Accessories Tune-up. The Galaxy DX 959 lives up to this reputation and happens to be a very popular Galaxy 959 CB radio. In most cases, you will need to replace it. to whistle myself to readings of over 40 watts peak! The PLL circuit consists primarily of IC2, IC3, Q25, Q27, Q28 and Q61. This was very popular when the Galaxy 10-meter radios first hit the market (D7 on the Galaxy DX-series 10-meter chassis). SSB gives a better signal and is more efficient at transmitting over longer distances compared to AM. RFX-95 Final. You may have to experiment Videos that show each and every step , not just the finished product. How do I fix a meter needle that is stuck on a CB radio? this by changing R42 to anywhere between a 33K to a 56K resistor. Use the coaxial cables to connect the SWR and antenna to the radio so you can receive and transmit signals, and set up your antenna somewhere high to maximize your range, such as the top of your car or house. results. An SWR reading of 3.0 or higher can damage your radio. 30 W peak power (perform a tune-up to radio to increase power, audio and performance) ) (AM: 1 ~ 6w Peak AM: 17 ~ 33). PC board. You'll also want Channels 1 and 40 to read identical to one another. 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