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Howdy Wrench,

First off I'd get rid of that f**king talkback resistor, that's the dumbest mod ever.
Next check to see if R104 has been cut or removed, if so fix that mistake. R104 is the voltage source for the AMC (Automatic Modulation Control), removing that can cause the audio to overload.

If you have one, run a D-104 on the 142 and go through the alignment precedures. They can be found on a Google search or in Sam's Photofacts. I did that to mine and it works great. Am (I don't run that much anyway) will do 4W DK and swing to about 6-7W, on SSB it will swing up to 15-18W easy. Trying to get much more than that will have no real net value, get it within specs and clean and that puppy will talk.

Also check out the power supply (especially if it shows backwards modulation on AM), crank up the voltage to 14.8V.

I have a copy of the alignment procedures if you want.

Good luck es 73!

<blockquote data-quote="Lefty" data-source="post: 347809" data-attributes="member: 23611">Howdy Wrench,First off I&#039;d get rid of that f**king talkback resistor, that&#039;s the dumbest mod ever.Next check to see if R104 has been cut or removed, if so fix that mistake. R104 is the voltage source for the AMC (Automatic Modulation Control), removing that can cause the audio to overload.If you have one, run a D-104 on the 142 and go through the alignment precedures. They can be found on a Google search or in Sam&#039;s Photofacts. I did that to mine and it works great. Am (I don&#039;t run that much anyway) will do 4W DK and swing to about 6-7W, on SSB it will swing up to 15-18W easy. Trying to get much more than that will have no real net value, get it within specs and clean and that puppy will talk.Also check out the power supply (especially if it shows backwards modulation on AM), crank up the voltage to 14.8V.I have a copy of the alignment procedures if you want.Good luck es 73!</blockquote>

[QUOTE="Lefty, post: 347809, member: 23611"] Howdy Wrench, First off I'd get rid of that f**king talkback resistor, that's the dumbest mod ever. Next check to see if R104 has been cut or removed, if so fix that mistake. R104 is the voltage source for the AMC (Automatic Modulation Control), removing that can cause the audio to overload. If you have one, run a D-104 on the 142 and go through the alignment precedures. They can be found on a Google search or in Sam's Photofacts. I did that to mine and it works great. Am (I don't run that much anyway) will do 4W DK and swing to about 6-7W, on SSB it will swing up to 15-18W easy. Trying to get much more than that will have no real net value, get it within specs and clean and that puppy will talk. Also check out the power supply (especially if it shows backwards modulation on AM), crank up the voltage to 14.8V. I have a copy of the alignment procedures if you want. Good luck es 73! [/QUOTE]

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