Hi All,

I have a query about an amplifier I have just acquired, a second hand Roland Cube X20 .  It’s in really good condition and all it’s features work fine but when I plug in the jack, before it’s connected to the guitar, I get a distinct hum.   This almost disappears when I hold the the other end of the lead - except if I touch the jack tip – then it really screams.

The hum also almost disappears if I touch any metal part of the amp.

When it’s connected to the guitar the hum is still there but not so obvious when it’s being played.

I don’t know much about amps or electronics but I feel that the amp  may have an earthing issue.   Then again, it might be quite normal.   This is my first experience with an amp so I really wouldn’t know.

Any help/suggestions would be greatly appreciated

Regards

 Art

Views: 42

The Essential Pages

New to Cigar Box Nation? How to Play Cigar Box GuitarsFree Plans & How to Build Cigar Box GuitarsCigar Box Guitar Building Basics

Site Sponsor

Recommended Links & Resources


Discussion Forum

Ruby Amp

Started by BrianQ.. Last reply by BrianQ. May 18, 2020. 6 Replies

Smokin' amp (literally)

Started by James Conder. Last reply by James Conder Aug 27, 2019. 4 Replies

Simple Headphone/Practice Amp

Started by BrianQ. May 16, 2019. 0 Replies

Problem with second-hand amp.

Started by Arthur Payne Mar 31, 2019. 0 Replies

Artec Amp Help!

Started by Jesse Lively Sep 10, 2017. 0 Replies

LM386 N-4

Started by Denis U. Last reply by Richard Haas Dec 3, 2016. 4 Replies

History Mystery--Orrtronic Tube Amplifier project

Started by Scott aka Farmer Ted Nov 17, 2016. 0 Replies

Dual IM386 Chip amp

Started by Paul Craig. Last reply by Paul Craig Nov 3, 2016. 31 Replies

Amp Speakers

Started by Primitive Acoustics. Last reply by Primitive Acoustics Mar 9, 2016. 3 Replies

Grounding for Cigar Box Amps: Chassis Ground?

Started by Erik Bell. Last reply by Scott aka Farmer Ted Dec 20, 2015. 4 Replies

Neat amp components

Started by Surly. Last reply by Alan Steeg Oct 27, 2015. 1 Reply

can a dab radio be turned into an amp

Started by Coventry Halfpenny guitars. Last reply by Pickedmoor Jon Oct 20, 2015. 3 Replies

SDA-T Questions

Started by alectron. Last reply by Zac Ray Sep 2, 2015. 10 Replies

HI - New guy & And speaker question

Started by Henry S. Last reply by Henry S Mar 25, 2015. 4 Replies

Are Pre-fabbed LM386 Moduals Worth Trying?

Started by Scott W. Last reply by Henry S Mar 24, 2015. 6 Replies

Powered sub to amp ??

Started by wormil. Last reply by wormil Sep 2, 2014. 2 Replies

Amp and speaker INSIDE the guitar?

Started by Greg Potts. Last reply by Ron "Oily" Sprague Jul 1, 2014. 1 Reply

trying to hack an old valve radio, into a guitar amp,

Started by GARAGE HERMIT. Last reply by GARAGE HERMIT Apr 29, 2014. 108 Replies

Best mini amp KITS

Started by MichaelS Country Boy Guitars. Last reply by Henrik Johansson Mar 10, 2014. 34 Replies

amp wiring help

Started by HarleyTodd. Last reply by Bernie Mango Feb 26, 2014. 18 Replies

Blog Posts

A Tribute

Posted by Ghostbuttons on January 15, 2023 at 12:00pm 1 Comment

Let’s talk Aeolian…

Posted by BrianQ. on August 26, 2022 at 5:05pm 0 Comments

Latest Activity

RON NORTHCUTT commented on RON NORTHCUTT's photo
Thumbnail

newstrummer finished 1

"This one is fun to play and sounds pretty darn good. These are less is more kind of builds, they…"
45 minutes ago
RON NORTHCUTT commented on Brian's photo
Thumbnail

PXL_20230131_064702579

"Nice build. I really like the neck. Nice job."
52 minutes ago
Uncle John commented on AGP #'s photo
Thumbnail

AGP #489 ''Odin''

"WOW!   A lot of time and careful work."
1 hour ago
Uncle John commented on AGP #'s photo
Thumbnail

AGP #489 ''Odin''

"Very good looking. Your wood burning looks masterful."
1 hour ago
Uncle John commented on AGP #'s photo
1 hour ago
Uncle John commented on RON NORTHCUTT's photo
Thumbnail

newstrummer finished 1

"That looks good and it looks like fun."
1 hour ago
Uncle John commented on RON NORTHCUTT's photo
Thumbnail

newstrummer finished 3

"Nice lines, angles and HAT!"
1 hour ago
Uncle John commented on Brian's photo
Thumbnail

PXL_20230131_064702579

"# 3 looks like a player and a good looker."
1 hour ago
Brian posted photos
6 hours ago
Glenn Kaiser liked RON NORTHCUTT's photo
13 hours ago
RON NORTHCUTT posted photos
14 hours ago
RON NORTHCUTT posted photos
14 hours ago

Music

© 2023   Created by Ben "C. B. Gitty" Baker.   Powered by

Badges  |  Report an Issue  |  Terms of Service

\uastyle>\ud/** Scrollup **/\ud.scrollup {\ud background: url("https://storage.ning.com/topology/rest/1.0/file/get/963882636?profile=original") no-repeat scroll 0 0 transparent;\ud bottom: 25px;\ud display: inline !important;\ud height: 40px;\ud opacity: 0.3 !important;\ud position: fixed;\ud right: 30px;\ud text-indent: -9999px;\ud width: 40px;\ud z-index: 999;\ud}\ud.scrollup:hover {\ud opacity:0.99!important;\ud}\ud \uascript type="text/javascript">\ud x$(document).ready(function(){\ud x$(window).scroll(function(){\ud if (x$(this).scrollTop() > 100) {\ud x$('.scrollup').fadeIn();\ud } else {\ud x$('.scrollup').fadeOut();\ud }\ud });\ud x$('.scrollup').click(function(){\ud x$("html, body").animate({ scrollTop: 0 }, 600);\ud return false;\ud });\ud });\ud \ua!-- End Scroll Up -->