V1 - build (photos on page 7)

SteveRB · « **Reply #120 on:** 23 Nov 2012, 10:12 pm »

well,

the amps might have had the hum from the beginning. Once I got them hooked up, I started playing records immediately.

They have been plugged in for about a week. I noticed the hum a few days ago -- in the morning when the house was quiet. I can hear it walking through the room now.

How do I go about 'floating the ground"?

Early B. · « **Reply #121 on:** 23 Nov 2012, 10:22 pm »

Put a cheater plug (3-prong to 2-prong adapter) on one of them.

SoCalWJS · « **Reply #122 on:** 23 Nov 2012, 10:27 pm »

Float the ground -install "Cheater plug(s)" - three prong to two prong converter. If the hum has been there since the begining, and it's an older house, there's probably a ground loop issue.

SteveRB · « **Reply #123 on:** 23 Nov 2012, 10:29 pm »

Quote from: SoCalWJS on 23 Nov 2012, 10:27 pm

Float the ground -install "Cheater plug(s)" - three prong to two prong converter. If the hum has been there since the begining, and it's an older house, there's probably a ground loop issue.

thanks,

I'm working on these issues in the power conditioning thread...
...hard to get a day off to really get into it though.

thanks again,

SteveRB · « **Reply #124 on:** 2 Dec 2012, 08:50 pm »

Grounds lifted. Still humming.

The hum is coming directly from the amp, with my ear close to the heat sink.

nrenter · « **Reply #125 on:** 2 Dec 2012, 09:34 pm »

Most likely, you have too much DC on your AC line (DC voltage on the line can cause transformer mechanical noise). You can DIY a solution, but I personally recommend an off-the-shelf solution (as AC can kill).

SoCalWJS · « **Reply #126 on:** 2 Dec 2012, 10:06 pm »

Is the humming still as loud as it was before? If it's the same, you might as well get rid of the "cheater-plugs". You'll have to approach it differently as nrenter stated. This is one of the big problems with older houses that have mediocre AC running through them.

SteveRB · « **Reply #127 on:** 2 Dec 2012, 10:39 pm »

Hum is the same with and without cheater plugs; I have removed them. I metered voltage: consistent 119-120v.

If I had to guess, it is transformer noise, like cheap track lights.

Can you suggest an off the shelf solution? Power issues and set up is a little foreign to me.

persisting1 · « **Reply #128 on:** 2 Dec 2012, 10:54 pm »

Can you post pictures of the finished speakers? Hopefully you'll get that hum issue fixed soon.

SteveRB · « **Reply #129 on:** 2 Dec 2012, 10:58 pm »

Pictures to come.

I was called out of town to help with a family health emergency for the past couple weeks. I'm sure I will bury myself in finishing them next week.

They are currently 'taped' together but playing music fantastically.

stevenkelby · « **Reply #130 on:** 3 Dec 2012, 12:46 am »

Quote from: SteveRB on 2 Dec 2012, 10:39 pm

Can you suggest an off the shelf solution? Power issues and set up is a little foreign to me.

If I were you I would contact Dave from PI Audio, he knows about such things and can probably sell you something to fix your problem:

http://www.audiocircle.com/index.php?action=profile;u=41236

Best,

Steve.

SteveRB · « **Reply #131 on:** 6 Jan 2013, 12:11 am »

Early B. · « **Reply #132 on:** 6 Jan 2013, 12:41 am »

Awesome!

persisting1 · « **Reply #133 on:** 6 Jan 2013, 01:54 am »

Simple and clean. Easily my favorite build to date. Congrats.

PDR · « **Reply #134 on:** 6 Jan 2013, 03:07 am »

Very nice Steve.....looks fantastic!

bdp24 · « **Reply #135 on:** 6 Jan 2013, 03:46 am »

Quote from: persisting1 on 6 Jan 2013, 01:54 am

Simple and clean. Easily my favorite build to date. Congrats.

+1. Less is more! Understated, clean, and classy.

corndog71 · « **Reply #136 on:** 6 Jan 2013, 03:53 am »

Love it. Well done!

Guy 13 · « **Reply #137 on:** 6 Jan 2013, 04:58 am »

Hi Steve and all Audio Circle members.
I should have (Originally) built mine like yours.
Be proud, nice work.
Guy 13

Captainhemo · « **Reply #138 on:** 6 Jan 2013, 05:36 am »

Agree with all the above, they look great. Necely done !!

-jay

SteveRB · « **Reply #139 on:** 6 Jan 2013, 05:05 pm »

Thanks for the help along the way everyone.

Quote from: persisting1 on 6 Jan 2013, 01:54 am

Simple and clean...

My first priority was to make it look like a speaker -- that's it. That's also the reason I went with the black grill cloth. The lighter colours made the whole the thing look a little precious. Right now they are pretty unassuming; until I turn them on, then the eyes widen and the jaws drop.