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Uniden PC 122, PRO 640 & Amp; PRO 810 Clarifier Mod
These radios use a lower cost chassis and you can just squeak 5 KHz down from them using a 5.6 µh chock in series with the varactor diode D23. The following instructions will open and increase the clarifier range:Remove D25Jump D24Lift the ground side of D23 and install a 5.6µh choke from the open lead of […]
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False Performance Claims In the CB Radio Industry
Back in the 70s, performance ratings were exaggerated a little. Advertisements of 5-Watt CB radios were common. It was true they were legal 5-Watt radios. However, that was input power not output power. The radios back then were less efficient than radios of today. Some units only had 2-Watt output. Then came the sideband radios, […]
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Uniden Grant Clarifier Mod. – CB World Informer
This one is similar to the Washington chassis but already has the 11.3258 MHz crystal in the circuit. The 5.6µh choke is needed for the extra range and a super diode in place of the stock varactor diode would give the best range. The following instructions will open and increase the clarifier range:Remove D52Remove R148Remove R174Remove […]
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Review Of The NorthStar DX880HL – CB World Informer
The new NorthStar line of radios are copies of the Galaxy line. These radios are said to perform as well or better than the Galaxy units. The one reviewed was made in China. In the past I’ve seen good and bad quality from China. Uniden has a factory in China and their products are well […]
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Magnum 357DX Conversions – CB World Informer
As mentioned in this month’s review of the Magnum 357DX, there are different conversions that can be performed on this radio. Two will be covered in this article. Remember to always disconnect electronic equipment from the power source before doing any modifications. The most common and simplest conversion is cutting the diode lead on the […]
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Mobile Linear Amplifier Selection & Amp; Setup
Before selecting a linear amplifier several things must be weighed. First, they are illegal to use on CB radio. You should research the decision carefully before taking the plunge into this very costly facet of the hobby. This article includes some facts that I hope will help you make the right choice. Adding more power […]
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General Lee Adjustment Potentiometers
VR1 “S” Meter Adjustment VR4 Squelch Coarse Adjustment VR5 FM Deviation Adjustment VR8 RF Meter Adjustment VR12 AM Low Power Modulation Limiter VR13 High Power Adjustment VR14 AM High Power Modulation Limiter VR16 Low Power Adjustment General Lee Adjustment […]
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Adding The Workman MD-4 To Other Radios
Adding the MD-4 to radios with internal analog meters is more difficult than the Magnum 257 and 357DX. Although the following amplifier circuit works with the Magnum 257/357dx radios, its not necessary unless you desire the bar graph meter to also work. Adding the MD-4 external meter to the radios internal meter signal adds a […]
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Comparison of Cobra 2010 GTLW & Amp; 2000 GTL
Back in the late 1980s, rumors were floating around that Uniden told Cobra that they would have to find a new manufacturer for their CB radio line. First came the Plus line of CBs. They were all Korean made low cost AM radios and sold through mass merchants as well as dealers. These radios performed […]
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MODERN LIGHTNING PROTECTION FOR RADIO FACILITIES: RF ENTRY PORTS
Lightning is one of Nature’s most destructive forces. It has the power of a good-sized explosive and cannot be avoided if you’re connected to antennas that are high and in the clear. And it’s not just lightning. On a recent evening, our 160 Meter dipole (260-foot wire span) strung between towers at 180′ here at […]
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