Noisy NAD 705

squirrel69 · 6th April 2006, 06:47 PM

O.K So I love my NAD 705. Like everyone who has owned one can attest :"GRRRRR those bloody lights!" No worries any more for this unit. I changed to an L.E.D. setup. Runs cooler and looks really cool with blue L.E.D's

However, it's quite finicky. It crackles when turned on and I have to turn up the gain in order for it to go away.

What could be the cause? Screwy capacitors? Screwy transistors?

Any advice would be welcome.

Thanks!

Netlist · 6th April 2006, 07:56 PM

Squirrel,
What do you mean by gain? Volume or the idle current?

/Hugo

squirrel69 · 6th April 2006, 08:09 PM

Oops...
yeah, volume.

I havenèt yet cracked it open as it's my only source of music right now and losing it is more a problem than the crackling noise....

so the noise goes away as I turn up the volume.

Netlist · 6th April 2006, 08:15 PM

Squirrel,
Is that with a signal at the input or not?
I'm asking because the volume of the music might mask the noise.
Check if the volume pot is dirty by moving it a tiny bit in the area where the crackle is audible; without input signal.
If that is the case, a tiny amount of contact spray is your friend.
Better is to replace the pot.

/Hugo

squirrel69 · 6th April 2006, 08:24 PM

Problem's not with the pot.

It's definately a deeper problem. It only occurs with an input signal and goes away after the reciever has warmed up a little. It only sounds like a bad connection which needs to warm up to function properly...

Grrr....

Netlist · 6th April 2006, 08:26 PM

Squirrel,
Carefully check the solderings. Voltage regulators, power resistors, input connections.

/Hugo

Leolabs · 7th April 2006, 01:37 AM

resolder all the solder joints will settle the problem.

6th April 2006, 06:47 PM	#1
squirrel69 diyAudio Member Join Date: Apr 2006 Location: Canada	Noisy NAD 705 O.K So I love my NAD 705. Like everyone who has owned one can attest :"GRRRRR those bloody lights!" No worries any more for this unit. I changed to an L.E.D. setup. Runs cooler and looks really cool with blue L.E.D's However, it's quite finicky. It crackles when turned on and I have to turn up the gain in order for it to go away. What could be the cause? Screwy capacitors? Screwy transistors? Any advice would be welcome. Thanks!

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6th April 2006, 07:56 PM	#2
Netlist diyAudio Moderator Join Date: Jan 2003	Squirrel, What do you mean by gain? Volume or the idle current? /Hugo

6th April 2006, 08:09 PM	#3
squirrel69 diyAudio Member Join Date: Apr 2006 Location: Canada	Oops... yeah, volume. I havenèt yet cracked it open as it's my only source of music right now and losing it is more a problem than the crackling noise.... so the noise goes away as I turn up the volume.

6th April 2006, 08:15 PM	#4
Netlist diyAudio Moderator Join Date: Jan 2003	Squirrel, Is that with a signal at the input or not? I'm asking because the volume of the music might mask the noise. Check if the volume pot is dirty by moving it a tiny bit in the area where the crackle is audible; without input signal. If that is the case, a tiny amount of contact spray is your friend. Better is to replace the pot. /Hugo

6th April 2006, 08:24 PM	#5
squirrel69 diyAudio Member Join Date: Apr 2006 Location: Canada	Problem's not with the pot. It's definately a deeper problem. It only occurs with an input signal and goes away after the reciever has warmed up a little. It only sounds like a bad connection which needs to warm up to function properly... Grrr....

6th April 2006, 08:26 PM	#6
Netlist diyAudio Moderator Join Date: Jan 2003	Squirrel, Carefully check the solderings. Voltage regulators, power resistors, input connections. /Hugo

7th April 2006, 01:37 AM	#7
Leolabs diyAudio Member Join Date: Dec 2004 Location: Bukit Mertajam	resolder all the solder joints will settle the problem.

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