Perry Babin Member. Is the heatsink grounding screw in place and tight? Is the antenna shield ground good? If this is the screw, that is near to the 12V DC input with rectangular solder pad under the screw - connected to the ground v - yes.
It is tight - I checked right now - resistance between heatsink and v is less than 0. The antenna is the original HONDA active antenna, that uses rear window heater as antenna, and small amplifier near it. Now, I'm checking also with standard home radio reciever tuner with external antenna - the same results. I checked this with other car amplifier, with many other PC and other switching PSU's around, but no problems with all of them.
I don't see anything out of the ordinary on the waveforms you posted. Maybe 1moreamp can offer some suggestions. Have you tried the amp in another vehicle to see if it causes problems? Perry Babin said:. Click to expand Tomorrow I'll check all this things. All of them are possible reasons for this problem. I'm already checked zobel networks resistors, but only from the top part of the pcb. It's possible to have burnt traces on the bottom side around power resistors or elsewhere BUMP any new info on this thread?
Staykov Member. The same situation with my amp pc At the moment both amps are together on the soft4gsm working desk. The same noise on spectrum analyzer, the same problem with radio reception when antenna is near the amp There are small difference in transformers in both amps - one is with multipair 2 wire secondary winding - the second is with only single wire. Also there are different ferrite beads on rect. This is for now. I'll continue on Monday next week. Show hidden low quality content.
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You should upgrade or use an alternative browser. Grounding to battery in high power systems. Thread starter Jexx Start date am. Jexx Member. How accurate is that? More options. Glowbug Member. As long as you have a good ground return through the chassis, and have upgraded the battery-to-chassis ground with a larger gauge, you're fine. If you don't have a lot of metal on the frame, and can't get a good chassis ground - then yes, run a seperate wire back to the negative post.
TO-3 Member. Jexx said:. Click to expand Re: Re: Grounding to battery in high power systems TO-3 said:. Re: Re: Re: Grounding to battery in high power systems vadi said:.
Could you pleas explain that?
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