Eastside,
Are you using a PEP meter when the watt readings were taken? Just curious.
I do have an asymmetrical modulation mod I have created that makes the Cobra 2000's sound great on the air, without flat topping or distorting. Robb, you have my thanks for mentioning this!
There's a simple transmit alignment you can perform that may get you some more output.
First of all, find a C945 out of a junk radio, and reinstall it at TR24.
Next, make sure TR26 (also labeled a C945) is not cut or removed. If it's cut or removed, replace it.
Also make sure R131 is intact. It's a 10k ohm resistor. If it's cut or removed, replace it. The color bands will be brown, black, orange, gold.
If all of the above components are in place, we can do a simple transmit alignment.
You will need a small flat head precision screwdriver for this, and it has to be either ceramic, nylon, or some type of plastic. It cannot be metal.
If you have one, hook up your power meter, set it to the 10W scale, set the radio to AM channel 20, mic gain all the way down.
Next, locate L45 and L46. They will be located in the back left hand corner of the main board, close to the final section. Key up the radio. With the small screwdriver, GENTLY adjust the slugs in these two metal cans for maximum deadkey.
Next, locate L38. It'll be a larger slug that's just right of the C1969 final. It will have a bigger slot, so you'll need a slightly larger flat bladed screwdriver. Key the radio, and adjust L38 for maximum deadkey.
Over time, these may have fallen out of adjustment, and re-adjusting these a bit can get you some more output, both on AM and SSB.
Let us know how you get on.
If you want info on my asymmetric modulation mod, and other tips and tricks, I'll be glad to share that info with you.
Good luck and happy tuning!
~Cheers~
Are you using a PEP meter when the watt readings were taken? Just curious.
I do have an asymmetrical modulation mod I have created that makes the Cobra 2000's sound great on the air, without flat topping or distorting. Robb, you have my thanks for mentioning this!
There's a simple transmit alignment you can perform that may get you some more output.
First of all, find a C945 out of a junk radio, and reinstall it at TR24.
Next, make sure TR26 (also labeled a C945) is not cut or removed. If it's cut or removed, replace it.
Also make sure R131 is intact. It's a 10k ohm resistor. If it's cut or removed, replace it. The color bands will be brown, black, orange, gold.
If all of the above components are in place, we can do a simple transmit alignment.
You will need a small flat head precision screwdriver for this, and it has to be either ceramic, nylon, or some type of plastic. It cannot be metal.
If you have one, hook up your power meter, set it to the 10W scale, set the radio to AM channel 20, mic gain all the way down.
Next, locate L45 and L46. They will be located in the back left hand corner of the main board, close to the final section. Key up the radio. With the small screwdriver, GENTLY adjust the slugs in these two metal cans for maximum deadkey.
Next, locate L38. It'll be a larger slug that's just right of the C1969 final. It will have a bigger slot, so you'll need a slightly larger flat bladed screwdriver. Key the radio, and adjust L38 for maximum deadkey.
Over time, these may have fallen out of adjustment, and re-adjusting these a bit can get you some more output, both on AM and SSB.
Let us know how you get on.
If you want info on my asymmetric modulation mod, and other tips and tricks, I'll be glad to share that info with you.
Good luck and happy tuning!
~Cheers~
