Search found 78 matches

by nomadradio
Sunday 26th May 2013, 5:11
Forum: CB Radio General
Topic: Browning Ping Project
Replies: 2
Views: 2611

Re: Browning Ping Project

Have you got a link to this project?

73
by nomadradio
Saturday 28th Jun 2008, 16:52
Forum: CB Radio Repair and Troubleshooting
Topic: Audio Transformer Get Hot?
Replies: 12
Views: 6857

I was unable to locate a diagram for that radio. The schematic is my starting point, whether the radio is in front of me, or across the planet. I'll pass along my general experience concerning failures that just 'happen'. I have accidentally bridged solder across adjacent foil pads on more than one ...
by nomadradio
Thursday 10th Jan 2008, 17:02
Forum: CB Radio Modifications
Topic: Looking for Cherokee Nighteider 150 mods
Replies: 3
Views: 3584

If the MC145106 PLL chip is accessible, this means that the 18-pin Z8 CPU on the channel-selector board is also accessible. Every NR150 I ever saw had the PLL chip and the CPU globbed together on the main pc board under a layer of hard epoxy. This was done precisely to prevent frequency expansion. T...
by nomadradio
Sunday 23rd Dec 2007, 21:36
Forum: CB Radio Repair and Troubleshooting
Topic: SBE console V / weak receive on AM
Replies: 22
Views: 14669

This is not quite the same radio, but I'm pretty sure the pc board is the same.

http://www.cbtricks.com/radios/sbe/sbe_ ... /index.htm

73
by nomadradio
Sunday 23rd Dec 2007, 21:32
Forum: CB Radio Repair and Troubleshooting
Topic: Channel Display
Replies: 6
Views: 5238

The digits in that radio are an LED display, as in Light Emitting Diode. Both digits are inside one chunk of plastic with sixteen pins, one row of eight on the top edge, eight on the bottom. Desoldering it from the pc board is best done with a desoldering iron. One with a heated, hollow tip is avail...
by nomadradio
Sunday 23rd Dec 2007, 21:00
Forum: CB Radio Repair and Troubleshooting
Topic: Galaxy Melaka no transmitt
Replies: 42
Views: 21472

Half a Watt? Time to take loose the base and emitter legs of the final transistor and see if it passes a diode test across those two. You can leave the emitter soldered to ground and do this with only the base leg unsoldered from the pc board. Sounds kinda like an open base to emitter junction. Or n...
by nomadradio
Tuesday 4th Dec 2007, 19:14
Forum: CB Radio Repair and Troubleshooting
Topic: Cobra 148 Clarifier Mod Problems
Replies: 18
Views: 12685

Wiring anything to pin 3 on the MB3756 is a mistake. Use pin 1. It's intended to supply some current. Pin 3 is NOT. Hooking to pin #3 is the kind of misinformation that circulates the web forever, since most folks who pass it on have no idea what is inside that chip. Hey Rick, that's a righteous red...
by nomadradio
Monday 15th Oct 2007, 17:44
Forum: CB Radio Repair and Troubleshooting
Topic: Uniden P400- Swing Mod & Talkback Mod
Replies: 3
Views: 3316

Err, a "P400" ?

Haven't found the tech info on that model yet.

Gotta figure it's got the same main pc board as a more familiar Uniden model, but I'm not sure which one that would be.

This isn't a european-standard or a 'down under' model is it?

73
by nomadradio
Monday 15th Oct 2007, 17:40
Forum: CB Radio Repair and Troubleshooting
Topic: AX144- No TX on AM/SSB no RX on AM but RX on SSB
Replies: 7
Views: 5172

Wait a minute, are you saying you can get receiver audio from the external speaker?

Or JUST the PA audio?

73
by nomadradio
Monday 15th Oct 2007, 17:38
Forum: CB Radio Repair and Troubleshooting
Topic: CODRA 29 LTD CLASSIC NO TRANSMIT
Replies: 12
Views: 8778

If you're going to run an amplifier, you will need to reduce the radio's carrier (dead-key) power level. Cranked for all it's worth, the radio will dead key between 5 and 6 Watts. Too much for most ammplifiers. But if you'll run it barefoot, by itself, this is TOTALLY WASTED EFFORT! Yep. Won't incre...
by nomadradio
Monday 15th Oct 2007, 17:32
Forum: CB Radio General
Topic: ssb compatability
Replies: 1
Views: 2629

Umm, "SSB" and "upper channels" are NOT the same thing, really. Now, the stock new-in-the-box Cobra 148GTL will cover ONLY the legal channels 1 through 40. And it's a SSB radio. SSB, or Single Side Band is just a way of splitting one channel into two, sorta. SSB tends to deliver better range than AM...
by nomadradio
Saturday 13th Oct 2007, 17:12
Forum: CB Radio Modifications
Topic: Grant lt echo board question.
Replies: 4
Views: 3786

Hi KM, Sorry about the lack of enthusiasm. Clear, complete instructions are a really big help when you're doing a procedure the first time. Now, if somebody (else) were to shoot some pictures or sketch the locations of what will hook where, and write up the hookup details, that might be a safe "firs...
by nomadradio
Saturday 13th Oct 2007, 16:59
Forum: CB Radio Modifications
Topic: superstar 33 ...aka ranger rg-33 ..looking for info
Replies: 24
Views: 16897

Sure enough, this is the thread I was remembering.

Working on it......

73
by nomadradio
Saturday 13th Oct 2007, 16:58
Forum: CB Radio Modifications
Topic: Vintage 29 mods
Replies: 1
Views: 2751

I don't recommend messing with the driver transistor. Don't think there is much to be gained from doing that, unless it's broke. The metal top-hat (TO-5) final transistor can be replaced with a 2SC1969. Lining up the TO-220 final's leads with the right holes in the PC board is a pain. Especially if ...
by nomadradio
Saturday 13th Oct 2007, 16:45
Forum: CB Radio Repair and Troubleshooting
Topic: AX144- No TX on AM/SSB no RX on AM but RX on SSB
Replies: 7
Views: 5172

Hmmm. This is the point in the troubleshooting process where I grab for a 'scope probe. For the moment, I'll just guess that you don't have one handy. Or an external speaker. The internal speaker is switched off when an external one is plugged in. If that switch contact in the external jack goes bad...
by nomadradio
Saturday 13th Oct 2007, 16:28
Forum: CB Radio General
Topic: I look to the project of a base ELBEX PD-8500 CB Transceiver
Replies: 1
Views: 2603

Hello Carlos,
I am not able to offer any advice for this radio.

It has not been seen in the USA, far as I know.

If you can locate the company that imports it to Portugal, this is your best hope.

73
by nomadradio
Thursday 11th Oct 2007, 19:14
Forum: CB Radio Repair and Troubleshooting
Topic: old style Super Star 3900
Replies: 11
Views: 7833

The "11Z" version of that pc board is from the very early nineties, pretty sure. Poking about for a radio with that board in it, but no luck yet. That would be the best answer to the question, one that hasn't come loose yet. Don't remember ever seeing those "flying" parts on the foil side of the PCB...
by nomadradio
Sunday 30th Sep 2007, 18:24
Forum: CB Radio Modifications
Topic: changing lights ??
Replies: 4
Views: 4237

Westgate http://www.westgateparts.com carries both the meter lamp and the two-digit channel displays.

Not sure about the jewel knobs. Sure sounds like a Bar-Jan item to me.

73
by nomadradio
Sunday 30th Sep 2007, 18:20
Forum: CB Radio Modifications
Topic: cobra 2000 GTL ????
Replies: 1
Views: 3426

I'd start with looking at the age of the radio. Around the 20 or 25-year mark some odd things begin to fail. Too bad it doesn't have an odometer like a car. The mileage is an issue, but no way to tell how many thousands of hours of running time the radio has on it. If it says "Made in Taiwan", look ...
by nomadradio
Sunday 30th Sep 2007, 18:05
Forum: CB Radio Repair and Troubleshooting
Topic: CODRA 29 LTD CLASSIC NO TRANSMIT
Replies: 12
Views: 8778

I can't escape the suspicion that some step in your procedure went wrong, and clobbered something. It's pretty easy to unintentionally create a solder "bridge". If the solder glob from one foil pad spills over onto an adjacent one, this can cause unpredictable failures. Just to start, I'd check to s...
by nomadradio
Saturday 29th Sep 2007, 19:49
Forum: CB Radio Modifications
Topic: changing lights ??
Replies: 4
Views: 4237

Uhh, "Lights" ? If you mean the one inside the signal meter, there's only one light in there. Gotta figure you wouldn't ask if you just meant the one tiny light with just two wires, right? Or do you mean the channel-display digits? Have never seen an on-line walkthrough of that project. Both digits ...
by nomadradio
Wednesday 26th Sep 2007, 7:00
Forum: CB Radio Alignments
Topic: i would like to learn ????
Replies: 1
Views: 3243

As for the bigger picture, learning about what goes on inside the radio, I recommend two books written by Lou Franklin. The Screwdriver Expert's Guide is a good intro. His other title, "Understanding and Repairing CB Radios" goes into more detail. His web site is at http://www.cbcintl.com The info f...
by nomadradio
Tuesday 25th Sep 2007, 18:06
Forum: CB Radio Repair and Troubleshooting
Topic: CODRA 29 LTD CLASSIC NO TRANSMIT
Replies: 12
Views: 8778

Do you have a way to test a transistor for a blown junction from base to emitter?

Time to check the driver and final both. That's what I would anticipate. That one of the two will show an open circuit from B to E.

73
by nomadradio
Sunday 23rd Sep 2007, 19:24
Forum: CB Radio Modifications
Topic: cobra 29 st driver
Replies: 3
Views: 3879

The 2SC2028 and the 2SC1957 are pretty much interchangeable. Don't think you'll see much difference in performance. Those two numbers were originally made by two separate, competing brands, each intended for the same market. Specs for the 1957 show a little higher power gain than the 2028, but proba...
by nomadradio
Tuesday 4th Sep 2007, 20:06
Forum: CB Radio Repair and Troubleshooting
Topic: connex 3300hp tx/rx
Replies: 22
Views: 19171

yamiraptor wrote: I'm going through and resolder alot of the joints and see if I might get lucky.
Always a safe bet with that radio. Let us know how it turns out.

73

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