RF Punch 200a4 Noise

faul · 22nd October 2010, 02:11 AM

Well, I have punch 200a4 that is making some humming noises. I have tried these things to try and fix it. Changed RCA wires, moved ground location, changed ground wire and tried. Ground has been sanded to bare metal. These noises persist. Only on this amp does this noise occur. I have a Kicker amp that I put in its place with all the same wires, just swapped amps and the noise isn't present. Then I put the punch amp back in and the noise was there. Is there anything I am missing here?

Perry Babin · 22nd October 2010, 02:52 AM

A hum or an engine noise whine that varies with the engine speed?

faul · 22nd October 2010, 03:00 AM

Engine noise. It only seems to be coming from this amp.

faul · 22nd October 2010, 03:54 AM

Oh, yes it does vary with engine speed.

Perry Babin · 22nd October 2010, 05:24 AM

Disconnect the RCAs from the amp. What is the resistance from the RCA shield to the amplifier's ground terminal?

22nd October 2010, 02:11 AM	#1
faul diyAudio Member Join Date: Oct 2010 Location: lafayette la	RF Punch 200a4 Noise Well, I have punch 200a4 that is making some humming noises. I have tried these things to try and fix it. Changed RCA wires, moved ground location, changed ground wire and tried. Ground has been sanded to bare metal. These noises persist. Only on this amp does this noise occur. I have a Kicker amp that I put in its place with all the same wires, just swapped amps and the noise isn't present. Then I put the punch amp back in and the noise was there. Is there anything I am missing here?

22nd October 2010, 02:52 AM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	A hum or an engine noise whine that varies with the engine speed? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

22nd October 2010, 05:24 AM	#5
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Disconnect the RCAs from the amp. What is the resistance from the RCA shield to the amplifier's ground terminal? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
RF 200a4	matlark	Car Audio	8	1st September 2010 03:54 PM
RF Punch 150	chipper	Car Audio	8	24th September 2009 12:08 AM
RF Punch 75.2, help plz	JSmooth420	Car Audio	5	17th September 2006 10:20 AM
Does anybody have schematic of RF Punch 250.1?	valterdaw	Car Audio	10	12th September 2006 04:32 PM
Rf punch amp won't turn on	nova_gh	Solid State	9	3rd December 2004 12:15 AM


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

22nd October 2010, 03:00 AM	#3
faul diyAudio Member Join Date: Oct 2010 Location: lafayette la	Engine noise. It only seems to be coming from this amp.

22nd October 2010, 03:54 AM	#4
faul diyAudio Member Join Date: Oct 2010 Location: lafayette la	Oh, yes it does vary with engine speed.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read