Recent content by David Springmire

Thank you nomadradio! I was going to ask about that. My apologies I get a bit confused when hearing the clarifier discussions. It does seem like a misnomer, I think it makes more sense to use "locked" as in transmit and receive are locked together. You, cable guy - and all here really have...

Nomadradio, thank you so much for the detailed explanation! So this "compensation" explains why there is no change in the counter frequency display when changing from AM to either USB or LSB in receive? Does this same compensation happen in SSB transmit? There should be no change in displayed...

Thank you Cable Guy! I sure appreciate it! Please forgive this next silly question but why does the owner's manual indicate it should read the actual receive and transmit frequency? By the way the frequency does change while adjusting the the clarifier. Thanks again! Much appreciated!

Good afternoon folks, I would sure like to ask for your help, clarification (and direction). I have Cobra 2000 GTL that will not show the SSB offset on the counter when selecting SSB mode. (e.g. on USB CH. 20 receive I would expect the counter to read 27.2065) but it reads 27.2050 in all...

Good morning, thanks so very much! I ordered the 12255 coil. I'd like to get (2) but looked like only (1) available. I emailed on the off chance they may get more in. Thank you too for the output power and mixer information! Now to try and get these mods in order, align it and Good Lord...

Oh, one other point if you're curious or maybe you all know the answer the NG L44 measured 1.2uH with the slug in the position shown and Z measured about 370 ohms.

Good evening all, I hope I don't offend anyone with the long post but if you'll bear with me at the end of this I do have a question. Just thought you might be interested in the result. I want to thank you all so very much for your quick responses, ideas, feedback and all around encouragement...

Good evening and thank you. Initially the receive sensitivity was very poor too. I aligned the PLL and the receiver, that got the receive to near spec. Next, went to align transmit and noticed AM RF power was low. I thought that was the only issue but found the mod where they removed the on...

Ok, I'll get on those caps next and give you the results. Thank you!

Great, thank you. AM with no modulation RF power = 4W A= 5.12V

Good evening, I wanted to make the measurements first and see what you thought before looking at why I'm not seeing 12.5V there may be something you see that explains it. These voltage measurements are taken in SSB (USB) using a 30mVrms (1KHz) sinewave and mic gain set to maximum. (RF output...

Thank you so much for the detailed explanation! I need to walk through this step by step so it may take a bit for me to wrap my head around it. I'll make measurements tonight and give you the results. Thanks again!

Okay, Great! Thank you!

Oh, and to your point, I can't find a "real" schematic for this unit anywhere, it seems to most closely resemble the Galaxy DX-2547.

Thank you, that's a really good question. I'll need to go back and fix the SWR cal control, it's just disconnected right now. There are 3 other mods I see - 1). The bright/dim switch (using AM CH.20 as a reference) in one position shifts the frequency from 27.2050 to 27.8450. 2). In one...