ShortScale Forum Index www.shortscale.org
Head 'n Neck Above
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 
UploaderUploader   ShortScale WikiBuilder

vol pot whistle

 
Post new topic   Reply to topic    ShortScale Forum Index -> All Other Guitars
View previous topic :: View next topic  
Author Message
Johno
.
.


Joined: 20 Apr 2006
Posts: 1889
Location: East London

PostPosted: Thu Nov 08, 2012 9:38 am    Post subject: vol pot whistle Reply with quote

The last couple rehearsals my guitar has started making this whistling noise when the volume is above 7, this only happens when I'm not playing & a drive pedal is on, either a Hot Cake or HM-2.

So the drive pedals are boosting the signal but how is the signal being produced?
Back to top
View user's profile Send private message
theshadowofseattle
THE TAMPA BAY HERO


Joined: 20 Apr 2006
Posts: 62474
Location: Skrampa, FL

PostPosted: Thu Nov 08, 2012 12:29 pm    Post subject: Reply with quote

...are you asking about feedback? Whoa, dude.

Okay, your strings vibrate slightly, the pedal boosts the signal, the sound comes out of the amp. The soundwave vibrations cause your strings vibrate more, which the pedal boosts again, amp produces the sound, over and over.
_________________
gusman2x wrote:
wizard thickness

George wrote:
Yeah, thickness, nut
Back to top
View user's profile Send private message
NickS
.
.


Joined: 14 Jan 2008
Posts: 9479
Location: Nr. Basinggrad, UK

PostPosted: Thu Nov 08, 2012 1:07 pm    Post subject: Reply with quote

If damping the strings with your hand doesn't change it, feedback may be through something else. I used to get horrible whistling feedback on my Eko Cobra until I potted the pickup with candle wax (orange, ha ha). It wasn't necessarily the pickup; the scratchplate may have been vibrating the pickup but changing the pickup's mass changed the resonance either way.
Back to top
View user's profile Send private message
Johno
.
.


Joined: 20 Apr 2006
Posts: 1889
Location: East London

PostPosted: Thu Nov 08, 2012 2:00 pm    Post subject: Reply with quote

theshadowofseattle wrote:
...are you asking about feedback? Whoa, dude.

Okay, your strings vibrate slightly, the pedal boosts the signal, the sound comes out of the amp. The soundwave vibrations cause your strings vibrate more, which the pedal boosts again, amp produces the sound, over and over.


ha ha no I'm not. Think i'll just change the volume pot.
Back to top
View user's profile Send private message
Brandon W
.
.


Joined: 24 Oct 2012
Posts: 8728
Location: happiest town in america

PostPosted: Thu Nov 08, 2012 4:41 pm    Post subject: Re: vol pot whistle Reply with quote

Johno wrote:
The last couple rehearsals my guitar has started making this whistling noise when the volume is above 7, this only happens when I'm not playing & a drive pedal is on, either a Hot Cake or HM-2.

So the drive pedals are boosting the signal but how is the signal being produced?

Unrelated but when i turn my wah on then mexican radio stations come through. Every once and a while a weird christian station also will come through. Loud as hell. I guess it's shielded bad or something but i'm thinking about leaving it! ha! The guitar signal mixes in and it can be great or really terrible. I like it being unpredictable.
_________________
cur wrote:
I need it to be smaller or I get shitty messages from mezz telling me my junk's too big.

Chico Malo wrote:
This thread just went down the toilet. Bye

iCEByTes wrote:
Carrotīs and pussy party happy joy joy
Back to top
View user's profile Send private message
Fran
The Curmudgeon


Joined: 20 Apr 2006
Posts: 21094
Location: Nottingham, Englandshire.

PostPosted: Thu Nov 08, 2012 5:47 pm    Post subject: Reply with quote

What guitar is it Johno? It does sound like a microphonic feedback issue and I doubt changing the pot will achieve much.
_________________
dezb1 wrote:
Stop fucking about and get an SD-1

robroe wrote:
I got a stomach ache. Anyone got any heroin? Or like a gun or something?

brandonwinmill wrote:
Maybe i'll sell my internet. It's lost its fun since i already beat it twice.
Back to top
View user's profile Send private message
Johno
.
.


Joined: 20 Apr 2006
Posts: 1889
Location: East London

PostPosted: Thu Nov 08, 2012 7:17 pm    Post subject: Reply with quote

Fran wrote:
What guitar is it Johno? It does sound like a microphonic feedback issue and I doubt changing the pot will achieve much.

It's a jazzmaster, never had any issues in the last 7 years. Just started happening in the past week. It whines like an elbow.
Back to top
View user's profile Send private message
paul_
.
.


Joined: 27 Jul 2006
Posts: 9121

PostPosted: Thu Nov 08, 2012 7:22 pm    Post subject: Reply with quote

It's definitely microphonic feedback. It's happening with the increased gain of the dirt pedals and the higher volume of your band levels. It only seems like it's the volume pot because lowering it decreases the guitar's output as it hits the dirt pedals, and therefore the gain as well.
The Japanese Jaguars had the exact problem you describe from the factory, and it's known to happen even to potted pickups on occasion, when something works loose.

What kind of pickups do you have, and does it happen on either/both of them or just one?
_________________
Aug wrote:
which one of you bastards sent me an ebay question asking if you can get teh kurdtz with that 64 mustang? Mad

robertOG wrote:
fran & paul are some of the original gangstas of the JS days when you'd have to say "phuck"
Back to top
View user's profile Send private message
Fran
The Curmudgeon


Joined: 20 Apr 2006
Posts: 21094
Location: Nottingham, Englandshire.

PostPosted: Thu Nov 08, 2012 9:32 pm    Post subject: Reply with quote

I'd check the pup cover isn't loose, the foam underneath can get too compressed and if you have adjusted the pup height it will cause microphonic feedback.
_________________
dezb1 wrote:
Stop fucking about and get an SD-1

robroe wrote:
I got a stomach ache. Anyone got any heroin? Or like a gun or something?

brandonwinmill wrote:
Maybe i'll sell my internet. It's lost its fun since i already beat it twice.
Back to top
View user's profile Send private message
Brandon W
.
.


Joined: 24 Oct 2012
Posts: 8728
Location: happiest town in america

PostPosted: Thu Nov 08, 2012 10:04 pm    Post subject: Reply with quote

Fran wrote:
I'd check the pup cover isn't loose, the foam underneath can get too compressed and if you have adjusted the pup height it will cause microphonic feedback.

That is a good point. I recently found out how adjusting pup height can create more microphonic feedback at lower volumes so yeah, in reverse should get rid of it. Smart.
_________________
cur wrote:
I need it to be smaller or I get shitty messages from mezz telling me my junk's too big.

Chico Malo wrote:
This thread just went down the toilet. Bye

iCEByTes wrote:
Carrotīs and pussy party happy joy joy
Back to top
View user's profile Send private message
Fran
The Curmudgeon


Joined: 20 Apr 2006
Posts: 21094
Location: Nottingham, Englandshire.

PostPosted: Thu Nov 08, 2012 10:14 pm    Post subject: Reply with quote

Its not so much the height, its the design. When you consider modern pickups, they are usually one concealed unit. This is because any loose parts or cavities can cause microphonic feedback, as example before the days of wax potting, Les Paul players used to remove the chrome covers. Jazzmaster (and more so Jaguar) pickups are prone by design because they aren't potted and the cover is not attached to the bobbin/baseplate. They rely on the foam and four screws for stability.
_________________
dezb1 wrote:
Stop fucking about and get an SD-1

robroe wrote:
I got a stomach ache. Anyone got any heroin? Or like a gun or something?

brandonwinmill wrote:
Maybe i'll sell my internet. It's lost its fun since i already beat it twice.
Back to top
View user's profile Send private message
Brandon W
.
.


Joined: 24 Oct 2012
Posts: 8728
Location: happiest town in america

PostPosted: Thu Nov 08, 2012 10:53 pm    Post subject: Reply with quote

Fran wrote:
Its not so much the height, its the design. When you consider modern pickups, they are usually one concealed unit. This is because any loose parts or cavities can cause microphonic feedback, as example before the days of wax potting, Les Paul players used to remove the chrome covers. Jazzmaster (and more so Jaguar) pickups are prone by design because they aren't potted and the cover is not attached to the bobbin/baseplate. They rely on the foam and four screws for stability.

Man that is good info. Thanks Fran.

This is what i was talking about. I posted this in another thread but it wasn't my words. It was from someone i trust. This is why your comment clicked for me.
"Another way to get feedback easier is to have lower output, microphonic pickups. You could even try lowering your pickup height on your guitars. That would force you to crank up your amp more to be the same volume, thus helping to achieve feedback."
_________________
cur wrote:
I need it to be smaller or I get shitty messages from mezz telling me my junk's too big.

Chico Malo wrote:
This thread just went down the toilet. Bye

iCEByTes wrote:
Carrotīs and pussy party happy joy joy
Back to top
View user's profile Send private message
Johno
.
.


Joined: 20 Apr 2006
Posts: 1889
Location: East London

PostPosted: Fri Nov 09, 2012 8:28 am    Post subject: Reply with quote

Cheers for the info Fran, will check the poup covers etc. The pups are SD Ant II's which have been installed for a couple years now.
Back to top
View user's profile Send private message
johnnyseven
.
.


Joined: 03 Jun 2007
Posts: 3996
Location: London, England

PostPosted: Fri Nov 09, 2012 9:38 am    Post subject: Reply with quote

Johno wrote:
Cheers for the info Fran, will check the poup covers etc. The pups are SD Ant II's which have been installed for a couple years now.


Are they my old ones? If so I never had any problems with them either.
Back to top
View user's profile Send private message
Johno
.
.


Joined: 20 Apr 2006
Posts: 1889
Location: East London

PostPosted: Fri Nov 09, 2012 10:06 am    Post subject: Reply with quote

johnnyseven wrote:
Johno wrote:
Cheers for the info Fran, will check the poup covers etc. The pups are SD Ant II's which have been installed for a couple years now.


Are they my old ones? If so I never had any problems with them either.


yep still got them
Back to top
View user's profile Send private message
honeyiscool
.
.


Joined: 01 Feb 2011
Posts: 2072
Location: San Diego, California

PostPosted: Sun Nov 11, 2012 4:47 pm    Post subject: Reply with quote

To test if it's your pickups, press down on your pickups gently as to compress it a bit. If it stops when you're holding the pickups, it's definitely the pickups. Press a little more foam into that slot or get your pickups more wax potted.

Vol pots can fail but pots can't add anything, they can only subtract, so they can't whistle.
_________________
Kicking and squealing Gucci little piggy.
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    ShortScale Forum Index -> All Other Guitars All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB Đ 2001, 2002 phpBB Group

Anti Bot Question MOD - phpBB MOD against Spam Bots
Blocked registrations / posts: 626595 / 0

Guitars at Musician's Friend

Help support this site by clicking the above link!