You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
I was against an unlocked clarifier for the longest time. Not sure why... But once I learned that even though I thought my Grant XL or any of my other radios were "aligned", I find it very annoying that when you power up, it does take a good 15+ minutes for the radio to slowly get on frequency...
This is related on what I was having when I used an adapter to use 4 pin cobra mics to my old Cobra 140 GTL 5 pin socket. Only this time, it made modulation too harsh to the point of distortion.
As Nomad explained, its because the ground of the mic element is separate of that from the common...
It caught me by surprise too. I knew the 146 GTL does not have it, but when I looked on the 140 GTL, its missing. Which is why I opened up a 142 GTL base radio to see how the dynamike was wired up.
Appreciate both of you chiming in.
That explains why it sounds overmodulated/horribly loud on the Cobra 140 GTL to the point of distortion. The adapter seems to be ok with the two pins shorted out on a Cobra 148/Uniden Grant XL, but at least you can back off on the mic gain on those radios...
Hello fellow CBers!
Last night got my two Cobra 140 GTL radios off the shelf, and it was shortly after I noticed my mic's audio being way too loud.... This was using one of those 5 pin to 4 pin adapters. I tested various 4 pin microphones and all did the same exactly thing. Normal talking and...
If I would of had one here in my totes, I would of been glad to offer it for just the cost of shipping. I will at least keep my eyes out if that radio shows up locally or in trade.
There is one on eBay as of now. Doesn't look to be in too bad of shape, but apparently has an issue with the output power.
Radios of this age really need a recap.
In my mobile setup, the foot warmer would stay transmitting after unkeying while on SSB. Turned out to be a bad coax from the radio to the amp. Changed it out and things were ok. I did double check the magmount antenna with the old MFJ antenna analyzer and things checked out.
Good radio! Apparently after some time the display can go bad on them, but like where pixels go missing or lines are going through it. Probably not much of an issue if you keep your radio inside VS leaving the radio in a mobile setup on many hot days/extreme cold.
Yesterday I went ahead and recapped the whole radio. The two resistors in question seem to be ok. (Maybe not the 1k resistor as its at a 2.xxK value. I forgot exactly what it was.), but they were at least in their right spots.
As I suspected, it needs the help of that power mic. Looking at...
That Disclaimer is great! :D lol. Too good.
It will take me a bit to digest and understand whats going on,but hoping it will settle in and I can understand. Thanks again for the explanation.
With these changes, do the rest the Cybernet boards suffer this? Like is there a specific Cybernet...
Appreciate the information. Does it still yield results by swapping C42 and C43 without replacing for a 1969 final? I just dont have a way to retune if I do swap out for a 1969.
I really really need to learn to read a schematic and not be instantly confused...
Just got the radio in. It is the PTBM050C0X. Didnt realize the power connector on back has the polarity different then that of a standard Cobra power cable. I will swap the wires around inside the radio so one doesn't burn up the radio.
You are A ok. :) No rush. I was messing with a SBE Sidebander II radio. Kinda neat. AM seems to be solid, but SSB struggles to get much modulation without yelling into the mic. It was included in a trade a couple years ago. Not in dire need to get it going lol.
My GE 3-5811B should arrive...
This forum does not allow a single user to have more than one username. If anyone wants to change their username contact an admin and it will be done. Multiple accounts belonging to the same member will be deleted without warning.