stingrayfan Posted March 19, 2011 Share Posted March 19, 2011 My Hartke LH500 started to make a low pitched hum at last rehearsal and gig after being used in anger, so decided to replace the pre-amp valve. The good news for you LH500 owners is, it's a pretty easy job. Unscrew the top lid of the head and you'll see the tube under a silver cone. Twist this off to reveal the valve. Gently wiggle out and replace with new valve. Replace valve cover. No hum on low volume test - will use in anger at rehearsal next week to properly find out if it has gone. Hope so! [attachment=75149:IMAG0398.jpg] [attachment=75150:IMAG0400.jpg] [attachment=75151:IMAG0401.jpg] [attachment=75152:IMAG0403.jpg] Quote Link to comment Share on other sites More sharing options...
fatgoogle Posted March 19, 2011 Share Posted March 19, 2011 What valve did you use. Im thinking of changing the one in mine to see if i can get some more growl to it. Quote Link to comment Share on other sites More sharing options...
stingrayfan Posted March 20, 2011 Author Share Posted March 20, 2011 Electro Harmonix - it's the box in that last picture. Cost a tenner. There was a Sovtek in there before. Hope it doesn't dirty sound - I love the warm, clean tone from this head! Quote Link to comment Share on other sites More sharing options...
.gif.9ad672bb8b84505709f76b39c8c256ec.gif)
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.