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Hello, do you have a copay for Cobra 2000 gtl? CB-251 Thanks

I had a little time today so I probed both sides of D53 and dint get anything. I attached a pic of the schematic I followed to FT3. I’m not sure why but I see the 7.8MHz at both TP62 & 63 but not TP61 or 64. The components marked in green are ones I checked to make sure not open or shorted all...

OK I picked up a scope and started looking at SO42P, I was seeing 35.8MHz on pins 11&13 0volts in both RX and TX and nothing on Pins 7&8 but did see .54vdc on both RX & TX. I did trace the voltage issue back to IC4 MB3756 luckily had a spare chassis from from long, long time ago so I pulled from...

I will Borrow a scope today and check the IC5 inputs

it does receive in AM, LSB & USB. MB3758 shows the following RX Pin 6 8.2vdc Pin 8 .5vdc TX Pin 6 .3vdc Pin 8 8.2vdc

Nomad, I used both a wattmeter with 1watt slug and another radio as suggested and see and hear nothing Anywhere I placed the coax end.

I did as suggested and see the following voltages. RX Pin 6 8.2vdc Pin 8 .5vdc TX Pin 6 .3vdc Pin 8 8.2vdc I also checked the “On the Air” bulb as it’s the only one not working and found something I believe to be strange. I tested the bulb at 12vdc and it works. I put a dc...

I’m new to this so not sure where to check for the +8v? I did notice the PA works. I think I may need to print out a larger schematic I hate following on a iPad.

i picked up a Cobra 2000 GTL knowing it wasn’t tested but for the price I figured the speaker alone was worth the purchase. Did a normal once over, correct fuse, nothing inside burnt… but I did find 2 loose parts inside, never a good thing. I included a few pics of what I see inside. It looks to...

I would do $50 plus shipping, lighting is the devil, even if one component bad many more soon to follow.

I have a modulation meter from a DAK IX that I acquired in an enclosure, what it was for I have no idea. My question is can I hook it to my 2000 gtl to view modulation with my 2000 gtl in Power out or SWR? Drew

Thanks NOMAD I ordered a bunch just in case I may pull the board today and remove a few to test them

Ok I will take a magnified look next, if they aren’t able to be soldered back is there a replacement available for them? Thank you

I started a new thread as the last one got away from me. Im following the alignment procedure in the Owners Instruction Manual. I checked all the Synthesizer Pin Voltage Chart, the only small issue I see is Pin 6. Pin 6 shows the 2.3 volts in crystal mode but in mAnual I’m only seeing 2.0 volts...

Ahh yes I’ve encountered that on a Yaesu FT-101E years ago, thanks for the reminder.

Got back to it yesterday and found a short across Q103 drain and supply. Voltage down from 11.5 to 1.8 With a used 2N5485, ordered a new one as I should see 2.5vdc I am getting the 12.5 dc on the other end. I proceeded by checking some of the Synthesizer board frequencies using a frequency...

Thanks Nomad I got the Pin 1 issue completed now I’m going to look for the Pin 6 issue. I see it runs to the Cal pull/ push switch and it looks like it’s been messed with so I’m going to follow the wires just wish I had a good schematic for this D201.

Ok matched a set and that did it but it takes a long time to settle in. Pegs far right then very, very, very slowly comes down, about 10 minutes. now that that was kind of fixed I wanted to tackle the next issue. So I figured I would start at the Trouble Shooting and Alignment. SYNTHESIZER PIN...

Thanks I will test the 6GH8’s and find the closest matched I can. I did remove and check R422 and it tested good.

Thank you !