Bottlehead Forum

Bottlehead Kits => Legacy Kit Products => Quickie => Topic started by: aragorn723 on September 24, 2014, 03:18:43 PM

Title: chasing Quickie noise
Post by: aragorn723 on September 24, 2014, 03:18:43 PM

Hi,

I have been noticing lately in the Quickie that there is a fluttering sound sort of like a helicopter when it is on.  The white paper in the community suggests that it might be a ground issue, so I reflowed a solder joint to one of the output jacks which wasn't completely filled with solder.  I have 3 different tubes, and tried them in different sockets and combinations, to see if that had an effect on the sound, but there was no change.  What else could be going on here??  Thanks,

Dave

Title: Re: chasing Quickie noise
Post by: Paul Birkeland on September 24, 2014, 05:01:31 PM

Can you post a recording of the noise?

Something like that could indeed be a bad connection.  Filling up a hole in a solder tab or terminal strip with solder may actually make the problem a lot worse. 

-PB

Title: Re: chasing Quickie noise
Post by: aragorn723 on September 24, 2014, 05:11:50 PM

Paul,

sure, i'll try to make one tomorrow.  Maybe it is related to the wireless router a few feet away too?  Read a couple of things on the forum about others having issues with that.  Thanks,

Dave

Title: Re: chasing Quickie noise
Post by: Paul Birkeland on September 24, 2014, 05:12:21 PM

Sure, that is potentially an issue, as would be certain cell phones.

Title: Re: chasing Quickie noise
Post by: aragorn723 on September 25, 2014, 04:48:56 AM

Paul,

I have a recording in .wav format, but it won't let me attach that file type to the message.  Is there an email address I can send this to?  Thanks,

Dave

Title: Re: chasing Quickie noise
Post by: aragorn723 on September 25, 2014, 06:40:14 AM

Turns out the issue was the router.  I unplugged it, then turned on the Quickie and amp, and the noise is gone.  What are some ways around this?  Thanks,

Dave

Title: Re: chasing Quickie noise
Post by: fullheadofnothing on September 25, 2014, 06:43:02 AM

Ethernet.

Title: Re: chasing Quickie noise
Post by: Paul Birkeland on September 25, 2014, 07:22:15 AM

See if it's just a proximity issue.  If you move the router 6 feet away, does that help?  This may also be a case where aluminum shields over the tubes may drown out some of that.

-PB

Title: Re: chasing Quickie noise
Post by: aragorn723 on September 25, 2014, 07:48:24 AM

Do you know of a place to find those?  Thanks,

Dave

Title: Re: chasing Quickie noise
Post by: Paul Birkeland on September 25, 2014, 08:09:53 AM

Search (http://lmgtfy.com/?q=7+pin+tube+shields)

Title: Re: chasing Quickie noise
Post by: aragorn723 on September 25, 2014, 09:26:45 AM

What's the theory of these shields?  Do they need to make electrical contact with the socket metal or physical connection to the tube to work?  Thanks,

Dave

Title: Re: chasing Quickie noise
Post by: Paul Birkeland on September 25, 2014, 10:58:54 AM

They work best when they are grounded.  Generally, you would want to replace the entire socket.  When you do so, you can wire a jumper between the middle (unused) lug of each 5 lug strip and the ground buss coming from the RCA jacks.

If you have the older version of the Quickie, you'd need to add some solder lugs on the mounting screws for the 7 pin sockets to solder jumpers to.

-PB