System Static Issue


Have an interesting situation in my system that I have at my work location. The system is leftovers from other upgrades but since it is used primarily as background it fullfills that quite well.

Recently, when I start it up in the mornings, while the preamp is in mute mode and volume is at 0, with no input signal, I will get a static sound out of both speakers, intermittent, but there.

I am assuming it is the tubes in pre (ARC LS17 se)

Have checked all connections and moved each (without static) to make sure that was not the problem.

Set up is used either to stream from internet or through a PSA Jr from SSD with music library on, through JRiver.

Before I get new tubes wanted to see if there are other issues I should consider.

ARC LS17se

Bedini 100/100

PSA DSD DAC Jr

Shahinian Arc

Furman Power PL Plus

128x128stevea1298

Good to hear you isolated it to the pre. Like I stated in my response earlier, always turn the amp on last. I would fix this issue though ASAP as it can, if you allow it to get worse, potentially take out your amp or your speakers or both. Good plan to start with a fresh set of tubes. 

Good thought, have to check at home and see what tubes I have for the 28 & 5se, retubed them within recent memory just due to age rather than hours. They were fine when pulled.

Wish the 17se had a hour meter like the others....

On average small signal tubes in ARC equipment lasts about 5000 + hrs.

The static could be caused by dirty tube socket/tube pins contact. You might try pulling and reinserting each tube a few times one tube at time in each socket. Usually that will clean the pins and socket contacts.

Okay, apparently it has something to do with the pre as turning amp on after the pre has warmed up there was no noise (static sounds) coming from system. I guess tubes will be the first order of business...

Thanks for the suggestion guys, mystery solved

 

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Ok, so for today I started the amp first and nothing but dead silence. Now ill turn that off and start preamp as audphile1 suggested, qallow it to warm up and take it out of mute and put back in manually and see what happens

Start up the ARC preamp first, wait until it get out of mute after its start up cycle completes, put it in mute manually, then power on your amp. Power on order - source, preamp then amp. Power off order - amp, preamp, source. 
As to your problem, most likely tune(s) in the ARC preamp need to be replaced. So it’s important to follow the power on and power off order. 
 

My Bedini 100/100 has started to make a thump on startup. It’s not a static sound so I’m not saying it’s the problem you are having or that it’s the amp. I am saying mine is getting old and I know it needs updating. I’ll be interested to see your findings. 

jea, good thought, can start them up one at a time

nevada, will start up eachone at a time, network is connected to DAC, so I can kill that.

Forgot to mention I have a bluetooth receiver to stream from computer to pre.

As pre is muted until it warms up, I have a little difficulty thinking it is tubes, but submitted question to ARC support....just in case

 

Ordering Deoxit to clean contacts..

Disconnect the network.  Then try just amp, then amp+pre-amp.  Then reconnect network.

Tomorrow morning just turn on the Bedini Amp. Do not turn on the preamp for a while. Listen for the static noise. If you hear static it's not the preamp causing it.

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Did you clean all connections,or just move them?  If you didn’t clean them,that’s where I would start.