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Got a Cobra 2000 GTL on the desk today.
Issues:
Weak receive in all modes.
Modulation/SWR meter won't fall back to 0. Stops at 30% scale.
Owner wants Hi-Fi installed.
Evaluation:
Receive alignment is out of whack. No real issue.
"Zero" adjustment on back of modulation/SWR meter needs freeing...
I contacted him on this issue and he finally fessed up. He had the gall to ask how I knew, I told him I have my trademarks in 2000's so I'll know if I've been in it before. Then on top of that gall, he wanted to know my trademarks, lol, the nerve of people. No I did not tell him.
I did warn him...
Got a Cobra 2000 GTL on the desk today. I was told by the owner that I had recently gone through it for him but he was having an issue with the low band frequencies.
Upon turning the radio on, I immediately noticed the meter lights were green. I never use colored lights in 2000's, I always use...
I've installed several 95hd's, very resilient. You can run them hot enough to drop the power completely out, let them cool down for 15 minutes or so and they'll bounce right back. Haven't heard of any shooting their wad due to swr as of yet on these 95's. I have a local that got his so hot, the...
Got a Cobra 29 LTD Classic Chrome Edition on the desk at the moment.
Issue:
No power (DC)
Evaluation:
1. Diode was blown in DC line and trace burnt in half in same area.
2. Some type of audio derived mod.
After fixing the power in issue, I contacted the owner and asked what he wanted done to...
I noticed my base voltages aren't correct, hmmm...although the collector is ok. Yea, gonna go the trace back route like you said, I'm trying to overthink it is why I can't figure it out. I've ran through this before, just can't remember what it turned out being.
Although my collector voltages...
Got an old Galaxy DX - 55V on the desk today.
Issue:
No transmit output.
Evaluation:
Passthrough regulator had a hole blown in the center of it.
Driver collector lead was shorting with the base lead through sloppy solder work.
Replaced final, driver, passthrough regulator, AF regulator...
Man, it never ends, lol...
I got a video text from another local that bought a cobra 29 from another local around here. He claimed he bought it because the seller said I was the one that set it all up and he liked how it sounded.
Well, the video text showed the radio hooked to a cheapo watt...
It never ceases to amaze me, lol...
A couple years ago I went completely through a practically brand new Galaxy DX 2547 for an old friend. That radio was flipping amazing on all aspects. Drive his amps better than ever before. He always had excellent compliments on how loud but clean it was...
That's what I'm thinking also. I think it's due to his extended key down which got the amp scorching hot. The heat may have damaged the relay contacts.
10 minutes on the key, 2 minutes off the key, 15 to 20 minutes on the key, 2 to 5 minutes off the key. That went on for about 5 hours til his...
Got a return Cobra 148 GTL that I previously installed an RFX95HD on up on the desk today.
Issue:
Owner got long winded on it the first night he had it, and the amp got so hot that it wouldn't key up anymore. The power started fading from 110w down to nothing.
Evaluation:
Although it ran...
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...
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