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 Post subject: Re: Hum issues
PostPosted: Fri Jul 07, 2017 7:00 pm 
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Joined: Fri Dec 27, 2013 7:46 pm
Posts: 44
Location: Surrey, BC, CA
There are plenty of amps that would blow the Psvane outta the water but I have one of those stupid things people call a budget lol


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 Post subject: Re: Hum issues
PostPosted: Fri Jul 07, 2017 7:01 pm 
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Joined: Tue Feb 28, 2006 5:40 am
Posts: 447
Location: Hamilton, ON, CA
With the Psvane being a remote controlled integrated, why is the McIntosh in there in the first place? Unless you need it for phono, it is the unnecessary piece.

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http://www.dtsaudioelectronics.com


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 Post subject: Re: Hum issues
PostPosted: Fri Jul 07, 2017 7:25 pm 
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Joined: Fri Dec 27, 2013 7:46 pm
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Location: Surrey, BC, CA
The C48 has a great phono stage and a pretty good DAC. My main source is my Rega RP6 with a dynavector 20X2L and when Im lazy I use my chromecast to stream Tidal thru the C48's DAC. It is also nice to use the C48's tone controls for poor recordings that need a lil help.


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 Post subject: Re: Hum issues
PostPosted: Sun Jul 09, 2017 7:02 pm 
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Joined: Sat Feb 07, 2015 6:57 am
Posts: 217
Location: North Vancouver, BC, CA
Sounds like ground loop to me. I found it's worse with tube amps for some reason, maybe because of the huge transformers usually employed. I've learnt to deal with it by using mainly ss amps and occasionally using tubes and not investing much money in them. The humx is worth trying I found it made a noticieably difference, watch the current rating though, I blew one up with a large amp. I tried all sorts of filters and power bars that are supposed to help to no avail. The often recommended fix of using a common power bar did nothing for me. Also, some tube amps are better than others. Rogue audio products were the worse for me. Massive hum audible from across the room.


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 Post subject: Re: Hum issues
PostPosted: Sun Jul 09, 2017 7:37 pm 
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Joined: Tue Aug 19, 2008 8:18 am
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Location: Etobicoke, ON, CA
try bypassing the pre-amp section on the Pvane by going directly from the Mac's out to 'power amp in' on the Pvane. pre out to pre in is always problematic and frankly, unnecessary.

J.


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 Post subject: Re: Hum issues
PostPosted: Sun Jul 09, 2017 7:52 pm 
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Joined: Fri Dec 27, 2013 7:46 pm
Posts: 44
Location: Surrey, BC, CA
Prosoundman wrote:
try bypassing the pre-amp section on the Pvane by going directly from the Mac's out to 'power amp in' on the Pvane. pre out to pre in is always problematic and frankly, unnecessary.

J.


Unfortunately the Psvane does not a a bypass or power amp in. Im thinking about getting a technician to add by bypass/main in but not sure if I'm ready to pull that trigger. I have the mcintosh hooked up to a dayton audio APA150 for the time being. It is dead silent and sounds pretty dam good for the time being. Not as "meaty" as the tubes but its good enough oil I can figure out what I want to do.

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Ray


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 Post subject: Re: Hum issues
PostPosted: Mon Jul 10, 2017 4:46 am 
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Joined: Thu Jan 13, 2011 11:29 am
Posts: 425
Location: St.Catharines, ON, CA
Could try swapping the input tube for a lower gain tube.Is the 6n9p the input tube?Could a 6sn7 replace it?
Might reduce the hum.

Gary


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 Post subject: Re: Hum issues
PostPosted: Mon Jul 10, 2017 10:07 am 
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Location: Etobicoke, ON, CA
sell the Pvane and buy some tubed power amps. problem solved.

J.


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 Post subject: Re: Hum issues
PostPosted: Mon Jul 10, 2017 4:16 pm 
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Joined: Sat Feb 07, 2015 6:57 am
Posts: 217
Location: North Vancouver, BC, CA
Not necessarily, youll still have a hum if it's ground loop. Tube amps are more susceptible I find. If you can borrow a tube power amp from a friend that would a good test.


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 Post subject: Re: Hum issues
PostPosted: Mon Aug 14, 2017 8:42 pm 
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Joined: Thu Sep 11, 2014 6:25 pm
Posts: 14
Location: Toronto, ON, CA
Install a ground rod and I can almost guarantee your problem will be gone. The best audio tweak for the money bar none. Quiet passage become dead black quiet!


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 Post subject: Re: Hum issues
PostPosted: Mon Aug 14, 2017 9:46 pm 
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Joined: Sat Feb 26, 2011 10:56 am
Posts: 10
Location: Montreal, QC, CA
nothing to do with the ground loop, but instead of bypassing the pre in the psvan, houw about using the record out of the C48 so you have use of the DAC and phono pre?


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 Post subject: Re: Hum issues
PostPosted: Tue Aug 15, 2017 5:36 am 
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Joined: Mon Sep 16, 2013 12:20 pm
Posts: 285
Location: Delta, BC, CA
Had the same issue with my system..... took hours to find the hum, first time it was a faulty RCA jack, replaced it with a new cord, hum went away, just to make sure, I eventually switched everything to XLR, hum stayed away, bought some new units, hum was back, again, after a few hours, I discovered this time it was one of the new units, would hum no matter what I did, nothing worked.... so it was punted out the door..... Unit gone, hum gone..... !!


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