SSE hissing problem. SSE hissing problem. - diyAudio
Go Back   Home > Forums > > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Tubelab Discussion and support of Tubelab products, prototypes and experiments

Thread Tools Search this Thread
Old 24th March 2014, 12:01 AM   #1
mudchute is offline mudchute  United Kingdom
diyAudio Member
Join Date: Jan 2012
Default SSE hissing problem.

Hi all,

I'm hoping you can help. My SSE hisses in use. Its intermittent but frequent and isn't exclusive to one channel. I it sound like radio noiee between stations or between tracks on a record.i've swapped all the tubes to no avail, used different sources, cables but again, no change.

Going up and down in volume appears to instigate it. It can even occur quite reliably at certain points in the volumes position so I changed the volume pot but again, no change.

  Reply With Quote
Old 24th March 2014, 03:05 AM   #2
rmyauck is offline rmyauck  Canada
diyAudio Member
Join Date: Apr 2009
Resistors can cause hissing. Maybe re-flow all solder connections and check every other connection for tightness.
  Reply With Quote
Old 26th March 2014, 10:39 PM   #3
mudchute is offline mudchute  United Kingdom
diyAudio Member
Join Date: Jan 2012
Hi, thanks for the suggestions.

I've just visually inspected all the Pcb components for obvious defects but found none. I've tightened all the tube sockets to give a better connection but that also made no difference.

I'll fire up the soldering irion tomorrow to reflow the solder joints but, failing that how does one identify a faulty resistor or is it best to simply replace all of them?
  Reply With Quote
Old 29th March 2014, 10:17 PM   #4
mudchute is offline mudchute  United Kingdom
diyAudio Member
Join Date: Jan 2012
I reflowed all the resistor joints and replaced C12, C22, C12 & C22 after reading about someone else's similar problem but to no avail.

  Reply With Quote
Old 31st March 2014, 01:34 AM   #5
Sodacose is offline Sodacose  United States
diyAudio Member
Sodacose's Avatar
Join Date: Feb 2006
Location: mke, wi
What's your grounding scheme look like?
WTF Amps || /r/diytubes/
  Reply With Quote
Old 31st March 2014, 09:42 AM   #6
mudchute is offline mudchute  United Kingdom
diyAudio Member
Join Date: Jan 2012
The same as this one.

Click the image to open in full size.

I've star grounded everything to one point then grounded that to the iec socket.
Its not a humming noise though, its the crackly hissing noise between tracks on a record. Very odd.
  Reply With Quote
Old 31st March 2014, 04:29 PM   #7
bobrown14 is offline bobrown14  United States
diyAudio Member
Join Date: Sep 2007
Hissing that changes can be a faulty tube/driver tube most likely. Try a few more 12AT7 - preferable old stock. Check your wires going from the input jack to the volume pot and solder joints on the volume pot. I twist my signal wires if not using shielded cable and be SURE the signal wires are as far away from your AC jack and AC wires going to the power transformer. Basically isolate those signal wires as best you can. Post a pic of underside maybe there's something glaring at you and another set of eyes can sometimes be a good thing.

Notice how on George's diagram all the signal wires are off to one side of the chassis away from most all the other wires. There's a reason for that not just to make the diagram easy to follow.

  Reply With Quote
Old 31st March 2014, 05:21 PM   #8
BZed is offline BZed  United States
diyAudio Member
Join Date: Jun 2009
I would check that the correct resistor values were installed around the input circuit and that any feedback has the correct component values and phase connection to the output transformer. Your description seems like it may be oscillating.
  Reply With Quote
Old 31st March 2014, 06:31 PM   #9
mudchute is offline mudchute  United Kingdom
diyAudio Member
Join Date: Jan 2012
I've tried multiple tubes which has made no difference.

I've kept the speaker terminals and input terminals away from the power supply wiring and is actually compartmentalised.

The input wiring is shielded, grounded and twisted.

The speaker wiring for the left channel is very short and goes no where near any power cables (it is only the left side that is hissing on and off, the right is fine and clean).

All components have been checked and, are the same part numbers specified by George and obtained from Mouser.

This noise hasn't been there from the start. I've had 6 months of clean sound and the on/off hissing has only been present since late last year. I've only just got around to doing something about it.
  Reply With Quote
Old 31st March 2014, 08:47 PM   #10
moggi1964 is offline moggi1964  England
diyAudio Member
moggi1964's Avatar
Join Date: Dec 2010
Location: Sale. UK
Obvious question but have you tried switching the speakers over to make sure the fault does not lie within the particular speaker? I expect so but rule out hte obvious....right!
TEAC RH 500 Amplifier Vista Phono1+ w/ TEAC TN-400. Loth-X Ion 1 BS & Emotiva XDA2. WIP: Tubelab SE 300b
  Reply With Quote


SSE hissing problem.Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
static 'hissing' noise problem hakentt Car Audio 20 14th April 2014 06:22 PM
Harman Kardon A-401 Treble Hissing Problem Alarudin Solid State 0 16th January 2014 12:38 PM
possible problem with sse royd55 Tubelab 1 19th July 2010 03:16 PM
possible problem with my sse royd55 Tubelab 4 1st March 2010 04:15 PM
lanzar 546-- problem with hissing noise over one channel jmg Car Audio 3 31st January 2008 04:00 PM

New To Site? Need Help?

All times are GMT. The time now is 12:53 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio