LM4780 echo/reverb on one channel. Please help

Nordic · 5th November 2006, 01:07 PM

Finaly got my LM4780 reference schematic boards installed in the case and connected to a PSU.

One channel plays fine, the other channel sounds like its comming through a tunnel and has quite a bit of reverby echoey sound artifacts...

Never encountered this error before so I am stumped as far as solveing the problem... gone over the PCB with the multimeter, and resistors seems to measure normaly etc...

Our telcoms copany dropped my dsl line a week ago, and it just went up 10 minutes ago again, so I have spend quite a bit of time on the ciruit allready.

Any help as to what the symptoms points to would be appreciated...

MaxS · 5th November 2006, 01:23 PM

Check your solders points, I've already experienced this problem with a bad solder.

Nordic · 6th November 2006, 09:27 AM

Still, no better, checked it over again, all traces and components seem connected properly according to my multimeter.

Lol think I'll just stick 2 LM3875s in there, they sound much nicer anyway.

neutron7 · 7th November 2006, 01:11 AM

If you ever discover what you did let us know because some people go to a lot of trouble to crate reverbs

Limhes · 8th November 2006, 06:33 PM

Indeed

. I would say, sell it to a guitarist on eBay for some absurd amount; they will use everything that sounds reverberating, especially if it's unique and there's no way of telling where it comes from...

neutron7 · 9th November 2006, 02:17 AM

OMG 1 of a kind mystery reverb. the only one in the world! also comes with an amplifier

don't you want to be the ONLY guitarist in the world with this amazing device!

Nordic · 9th November 2006, 06:19 AM

Somewhere in the garage I have a tiny guitar training amp, that has those springs it uses for reverb.... realy ought to fix it up sometime..

5th November 2006, 01:07 PM	#1
Nordic diyAudio Member Join Date: Sep 2005	LM4780 echo/reverb on one channel. Please help Finaly got my LM4780 reference schematic boards installed in the case and connected to a PSU. One channel plays fine, the other channel sounds like its comming through a tunnel and has quite a bit of reverby echoey sound artifacts... Never encountered this error before so I am stumped as far as solveing the problem... gone over the PCB with the multimeter, and resistors seems to measure normaly etc... Our telcoms copany dropped my dsl line a week ago, and it just went up 10 minutes ago again, so I have spend quite a bit of time on the ciruit allready. Any help as to what the symptoms points to would be appreciated...

5th November 2006, 01:23 PM	#2
MaxS diyAudio Member Join Date: Mar 2006 Location: France	Check your solders points, I've already experienced this problem with a bad solder. __________________ Ca marche pas ! Tu ne l' as pas branché non plus ....

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6th November 2006, 09:27 AM	#3
Nordic diyAudio Member Join Date: Sep 2005	Still, no better, checked it over again, all traces and components seem connected properly according to my multimeter. Lol think I'll just stick 2 LM3875s in there, they sound much nicer anyway.

7th November 2006, 01:11 AM	#4
neutron7 diyAudio Member Join Date: Dec 2003 Location: Toronto Canada	If you ever discover what you did let us know because some people go to a lot of trouble to crate reverbs

8th November 2006, 06:33 PM	#5
Limhes diyAudio Member Join Date: Apr 2005 Location: Nijmegen!	Indeed . I would say, sell it to a guitarist on eBay for some absurd amount; they will use everything that sounds reverberating, especially if it's unique and there's no way of telling where it comes from...

9th November 2006, 02:17 AM	#6
neutron7 diyAudio Member Join Date: Dec 2003 Location: Toronto Canada	OMG 1 of a kind mystery reverb. the only one in the world! also comes with an amplifier don't you want to be the ONLY guitarist in the world with this amazing device!

9th November 2006, 06:19 AM	#7
Nordic diyAudio Member Join Date: Sep 2005	Somewhere in the garage I have a tiny guitar training amp, that has those springs it uses for reverb.... realy ought to fix it up sometime..

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