Recent content by Hawkeye351

I wouldn't mind trying out a few of the crystal board products (first pic). These guys around here are spoiled on the expos, but they don't realize how old those things are, lol... How much for 3 of the crystal boards with crystals? And, for the crystal boards, do they install the same as the...

Oooops, I believe I miscalculated...lol... 11.1125 - 0.147 = 10.9655, not 10.695 as before. That's why it drops down to the middle of 25mhz when switched to the low channels. Now to go through my parts to round up a 10.9655 crystal.

Got a Uniden Washington (8719 PLL) on the desk. Issue: Extras not working properly. Evaluation: Only one crystal in the expo kit. The 11.1125 (original radio crystal) is the only crystal inserted in one end of the row for the crystals. I found out that the high channel crystal for this B...

Just me explaining more of what I was getting at. Wattage is a unit of power, representing the rate at which energy is transferred or converted. Gain is a measure of how much an amplifier or a device amplifies or boosts the input signal. Many things in life have relationships to each other...

The "Truck Stop Tunes" actually takes gain away from the radio, in exchange for watt's. The watts are useless without the gain. Think of gain of watts the same as you would think of amps of AC volts. What good is 120v AC with 0 (zero) amps? What good is the voltage if no amps are present...

UPDATE #2!!!! Both my local friends got their radios back from Ranger this past Wednesday. One is working great, alone with no amp sounds good. When he turns his amp on he sounds choppy. He's running an external amp behind it. I told him that's too much swing (drive) input for that amp (Italy...

I got in contact with the owner yesterday and described how the channel mod was done and how it's acting screwy. Well, he told me that's one thing he wanted me to straighten out anyway because it was confusing to work without a frequency counter and it would drop out on a lot of extras. I told...

How bout wide banding this chassis? Reason for asking is the low channels (below 26.765) will not lock on. I tried adjusting VCO but had no luck. I read somewhere about removing C81 completely and replacing R84 with a 47k ohm resistor to widen it out for extra channels. Is this correct, or is...

I removed R143 and replaced it with a 5.1k ohm. I now have slide from 27.2012 at the lowest position up to 27.2088 on the highest position. That's 3.8k of slide on both sides, and the clarifier is still centered at 12 o'clock for being on frequency. I tried shorting out R143 with a jumper. The...

I noticed on the 2000/148 chassis, the R174 which is directly tied to the center (wiper) lead of the clarifier. Which most people place a jumper across. Well the first resistor tied in with the center (wiper) lead of the 142 clarifier is R143, which is a 10k. So, should I replace the R143 10k...

Hmmm, after thinking over it a few minutes, R415 isn't even in the clarifier circuit any more since I removed the red/white stripped wire from that location that's tied in with R415. The red/white wire is now on the main PC board ground track. How can I get more range without that choke, with...

I compared the schematics of the 2000 and the 142 against each other and came up with R415, which is on the switch board and tied into where the red/white stripped wire came from factory. Someone has a jumper across this resistor. I should remove this jumper and try something like a 2k right...

Got a Cobra 142 GTL base on the desk today. Issue(s): 1. Squeals through speaker when Transmitting. 2. Clarifier not centered at 12 o'clock. 3. Receive weak in all modes. 4. Both sidebands sound terrible. Evaluation: 1. The external speaker jack on the back of the radio is loose, which...

I use this variable key method on all cobra 29, 25, etc...and it works great. The only change I make, is to replace the 100 ohm resistor coming from the lowest tab of the external potentiometer to ground with a 1k ohm variable resistor. In place of the 100 ohm resistor, solder the wiper tab of...

I set the driver bias to 4.25v and both the finals to 3.80v each. Reset carrier levels for RF power all the way up to a 9w key and all the way down to a 1w key. Replaced the modulation VR inside the radio due to other one fluctuating badly when adjusting. Added a 22k ohm resistor across the...