Derek92994's 700 Ser II White Oak conversion

[derek92994]

Could hear some buzzing coming from the WOPL, both Pots turned right down, Pre-Amp switched off. Had to get very close to speakers to hear it, but its there. Wasn't there before. Anything to worry about? Its been powered up for weeks.

 

[WOPL Sniffer]

is it my eyes or is the pointer on your left meter missing?

 

[derek92994]

is it my eyes or is the pointer on your left meter missing?

It fell off during transit. The amp performs brilliantly so its not really a big concern. I'd like to replace it someday though.

 

[laatsch55]

Must have been some rough seas on the crossing...

 

[WOPL Sniffer]

Pretty much meters and transformers is about all we can't get.

 

[laatsch55]

The buzz is nothing to worry about unless it gets worse..but before we attribute it to the WOPL , plug it into a dedicated plug separate from any cabled devices and check again. Cable TV can have those effects on audio...

 

[derek92994]

The buzz is nothing to worry about unless it gets worse..but before we attribute it to the WOPL , plug it into a dedicated plug separate from any cabled devices and check again. Cable TV can have those effects on audio...

What is TV?

Ok I will Isolate it, but I don't want to power it down

 

[derek92994]

I'll smoke some good stuff first before I do that.

 

[laatsch55]

A buzz almost always means ac interference..hiss is almost always parts related..

 

[laatsch55]

Be sure to unplug anything from the computer going to the pre....if you have such a thing...

 

[derek92994]

A buzz almost always means ac interference..hiss is almost always parts related..

Lots of AC going left right and centre here, no way to avoid that. I'll monitor the buzz, its not annoying because you almost have to put your head in​ the speaker to hear it. I was working very close to the speaker when I heard it, that's probably why I have never heard it before.

 

[derek92994]

I have an Isolated circuit in the house which can be used for testing. When I feel like getting off my ass.

If you power down a WOPL then back up within a minute or two, does it keep that nice sound that normally takes a couple of days from cold start?

 

[laatsch55]

Well, that amp has traveled a few miles. I certainly didn't hear a buzz when it was here and my K's are kinda efficient. I'll have to look at your THD &N tests and see if there was a bad dip at 60 hz.

 

[derek92994]

Well, that amp has traveled a few miles. I certainly didn't hear a buzz when it was here and my K's are kinda efficient. I'll have to look at your THD &N tests and see if there was a bad dip at 60 hz.

We run at 50hz on the 240 volt line here.

 

[laatsch55]

I have an Isolated circuit in the house which can be used for testing. When I feel like getting off my ass.

If you power down a WOPL then back up within a minute or two, does it keep that nice sound that normally takes a couple of days from cold start?

Can't say as if I tried that.


Maybe you can be the one to answer that question ....

 

[derek92994]

Isolated the WOPL to a dedicated circuit with only 1 outlet in the house, still the same. Both channels. But only when real close to speaker, not in listening position. Did a recording:

https://www.dropbox.com/s/vf0u2n7i7sepps4/sample.wav?dl=0

 

[derek92994]

Can't say as if I tried that.


Maybe you can be the one to answer that question ....

Still sounds fine =)

 

[laatsch55]

On my phone at work....can't open it. I'm in the machine shop today...I aunt gonna hear no buzz...

 

[derek92994]

On my phone at work....can't open it. I'm in the machine shop today...I aunt gonna hear no buzz...

Ahh, no worries bud. All good. Just started the weekend here. Hows your shoulder and rib?

 

[laatsch55]

My shoulder is FANTASTIC. My ribs quit hurting days ago..