Mike, you are amazing Sir. I enjoy your videos so much, understanding them completely, that’s actually another matter. I’m 57 and I only wish I had been interested in this hobby when it was so big but sadly I wasn’t. I’m sure glad you are still planning your electronics course.
My 1987 148GTL has 3 switches, the 3rd one bumps 10KC to get the missing A channels. It does 15 channels below CB1 up to 3 channels above 28Mhz. It still works, needs a new meter and meter bulb.
Wire is a componant! Wires offer more capacitence.The longer the wire, the worse your chances of sucess. Adding trimmer caps is hacking! I did a wild conversion back in the early 1990's on the 8719 chassis. A low crystalwith the original and full PLL mod that covered 25. 7 to 28.0850. I used a 6 position rotary switch and a relay to switch the crystals. Wire to the crystals was kept super short because the relay was located VERY CLOSE to the original crystal location. Widebanding the radio didn't offer quite as much coverage as the old 858 chassis. When Uniden came out with the 8719 chip, some labeled it "The CHIP!" I about crapped myself when I saw how little it did when put up against the UPD 858. The UPD 858 was "THE CHIP!"
Hi Mike, enjoy your videos and subscribed. I know this is an old video, but do you have an opinion on the old CBC International "Channel Guard" filter? My 2000GTL has one in it.
I have stock of almost every part used in any CB radio ever made. Tube type, solid state, through hole or SMD, I probably have it. Also a huge inventory of TV, record player, tape player, stereo, amateur radio, short wave radio parts.
You just blew somebody's secret $35 mod. You could hear 'em say, I engineered a process to where I can make your original display show the seconds. From the factory the clock is bricked up tight but my technique unlocks the clock in such a way it's almost like it was meant to be.
You do a beautiful restore... have to laugh though, you get so frustrated with people that beat up and modify a beautifully designed radio.. I watch you just to watch you get pissed off.. lol
Why cannot they use a clock of 40.96mhz which goes through a Johnson counter which drives something like 2x PI5V331 configured as balanced Tayloe mixers one for the QSD and one for QSE, the QSD will drive the phasing combiner which goes to the volume control and one gets fed from the microphone amp to a phase splitter which drives the QSE, both the QSE/QSD are connected to the TX/RX mixers then on to the antenna, no SSB filter is required as phasing cancels out the unwanted signal unless you really want a 10.240mhz SSB filter, a switch in the Johnson could change the modulation mode between LSB/USB.
I never liked the what I've heard described as the piano Style cobras. The 2000 obviously being one of them. Adding a frequency counter to a Uniden Madison is the way to go if you like myself don't like the piano Style Cobra 2000. Had Uniden done this from the factory I think the Madison would have been as popular as the 2000. maybe more popular. You (Mike) added the frequency counter to my Madison and I've enjoyed the transceiver more than any other I've ever owned since that modification was complete. Adding the vfo was the icing on the cake. If anybody wants to see the Madison I am referring to just scroll down to Mike's 3rd or 4th video. That's the one (madison) I own and still enjoy to this day.
I fail to see why people pay to have all this work done to a radio to get channel's they cannot use legally and there is know one there to talk to to begin with.
Honestly I think it's bragging rights. You know, the "I have more channels than you" philosophy. If they actually wanted more frequency coverage they would just get a HF rig, a license and get it over with.
Excellent repair and restoration of a classic radio! Thanks for the explanation. Wonderful videos!
Removing the extra xtal channel expansion was the first thing I did to mine! Worked a lot better on the 40 afterwards!
Mike, you are amazing Sir. I enjoy your videos so much, understanding them completely, that’s actually another matter. I’m 57 and I only wish I had been interested in this hobby when it was so big but sadly I wasn’t. I’m sure glad you are still planning your electronics course.
another great job Mike
My 1987 148GTL has 3 switches, the 3rd one bumps 10KC to get the missing A channels. It does 15 channels below CB1 up to 3 channels above 28Mhz. It still works, needs a new meter and meter bulb.
Wire is a componant! Wires offer more capacitence.The longer the wire, the worse your chances of sucess. Adding trimmer caps is hacking! I did a wild conversion back in the early 1990's on the 8719 chassis. A low crystalwith the original and full PLL mod that covered 25. 7 to 28.0850. I used a 6 position rotary switch and a relay to switch the crystals. Wire to the crystals was kept super short because the relay was located VERY CLOSE to the original crystal location. Widebanding the radio didn't offer quite as much coverage as the old 858 chassis. When Uniden came out with the 8719 chip, some labeled it "The CHIP!" I about crapped myself when I saw how little it did when put up against the UPD 858. The UPD 858 was "THE CHIP!"
Yep, a wire is nothing more than a low resistance resistor with inductance and capacitive properties.
I just subscribed to your channel you do a great job on repair and restoration. Thanks for sharing your expertise.
You did a beautiful job on this radio Mike. Great job.
Are you still doing repairs on cobra 2000 gtl’s?
Very nice radio
I like your videos
Hi Mike, enjoy your videos and subscribed. I know this is an old video, but do you have an opinion on the old CBC International "Channel Guard" filter? My 2000GTL has one in it.
how do I get mine to you,,, I would love for you to clean mine and make sure it's in good condition before I plug it in then 15 years
Mike, do you have a large stock of bipolar final and driver transistors or are you at the point where you have to use MOSFETs?
I have stock of almost every part used in any CB radio ever made. Tube type, solid state, through hole or SMD, I probably have it. Also a huge inventory of TV, record player, tape player, stereo, amateur radio, short wave radio parts.
Doesn't l e d's mess up the radio frequency
I'm not sure what you mean by mess up the radio frequency. It's just a LED, a diode that emits light.
You just blew somebody's secret $35 mod. You could hear 'em say, I engineered a process to where I can make your original display show the seconds. From the factory the clock is bricked up tight but my technique unlocks the clock in such a way it's almost like it was meant to be.
What electronics course
What's the point of all the channels? Are there others out there that can receive those channels?
You do a beautiful restore... have to laugh though, you get so frustrated with people that beat up and modify a beautifully designed radio.. I watch you just to watch you get pissed off.. lol
Why cannot they use a clock of 40.96mhz which goes through a Johnson counter which drives something like 2x PI5V331 configured as balanced Tayloe mixers one for the QSD and one for QSE, the QSD will drive the phasing combiner which goes to the volume control and one gets fed from the microphone amp to a phase splitter which drives the QSE, both the QSE/QSD are connected to the TX/RX mixers then on to the antenna, no SSB filter is required as phasing cancels out the unwanted signal unless you really want a 10.240mhz SSB filter, a switch in the Johnson could change the modulation mode between LSB/USB.
You do realize this is a CB radio. Never going to happen, not cost effective in a low dollar consumer level item like a CB.
MikesRadioRepair a cheaper chip is the 74hc152 in place of the PI5V331
I never liked the what I've heard described as the piano Style cobras. The 2000 obviously being one of them. Adding a frequency counter to a Uniden Madison is the way to go if you like myself don't like the piano Style Cobra 2000. Had Uniden done this from the factory I think the Madison would have been as popular as the 2000. maybe more popular. You (Mike) added the frequency counter to my Madison and I've enjoyed the transceiver more than any other I've ever owned since that modification was complete. Adding the vfo was the icing on the cake. If anybody wants to see the Madison I am referring to just scroll down to Mike's 3rd or 4th video. That's the one (madison) I own and still enjoy to this day.
Bird man had that base station.
309 on the side.
Mike, How would a person be able to contact you?
Just add @gmail.com to my youtube user ID.
Thank you
Anybody out there in dx land know how to change the time format I bought a 2000 and the clock is in military time I want it to be 12 hour
Mike I just buy one cobra 2000 I will like to do some repair on the radio I can contact you
Mike loves vintage radios just like all of us do...pl;ease dont drill holes in an old radio ...we understand.....kinda hurts to see it...
Very nice
Mike I have a whole like new front...no holes in it
Constantly repeating yourself makes these other wise great videos painful to sit through.
I fail to see why people pay to have all this work done to a radio to get channel's they cannot use legally and there is know one there to talk to to begin with.
Honestly I think it's bragging rights. You know, the "I have more channels than you" philosophy. If they actually wanted more frequency coverage they would just get a HF rig, a license and get it over with.
Because we want to.
@@randyames7450 And because of low IQ. Dumb is dumb. Look forward to seeing you on FCC violation list.
@@gmcjetpilot FCC? lmao! you idiot.