Excessive noise TH-30 Head

Orange Amps General Forum

Moderator: bclaire

Post Reply
New Member
Posts: 12
Joined: Tue Oct 16, 2018 7:11 pm

Excessive noise TH-30 Head

Post by Snowdogyyz » Thu Dec 20, 2018 8:30 pm

I got this head a few weeks ago and it was pretty quiet, especially on the clean channel. Now it it has become quite noisy of late on clean and more on dirty (expected since higher gain). I changed out the preamp tubes, but that didn’t help. Would the power tubes be the culprit? I don’t have 4 matching el84’s to replace them at the moment. Just wanted to check before I order if they are possibly the cause. It’s loud static with some popping/cracking.

Ronnie Robinson
Orange Master
Posts: 3148
Joined: Wed May 23, 2007 3:39 am
Location: In the beautyful North , UK

Re: Excessive noise TH-30 Head

Post by Ronnie Robinson » Thu Dec 20, 2018 9:20 pm

I'm assuming your going straight into the amp and have tried a couple of different leads and guitars and still the same issue?

I only say this as recently my new Rocker 15 was intermitendly fading out then back in in volume ... I thought if was a tube issue but then identified it was actually caused by the power supply to one of the pedals!

If it effects both channels it's quite likely to be the power tubes, if it is a tube problem.... Which it most likely is, so certainly the thing to check first.

You don't say how old or how much use the tubes have had... I'm guessing you bought it used.

You don't need 4 el84s to diagnose the issue you only need one, replacing one at a time then at least you will know it is a tube. Using the amp briefly with a none matched tube is not going to do it anyharm. If it's not a tube then you may not need to buy any......although the issue may be more expensive to fix.
Orange AD30 HTC
Orange Rocker 15 terror
Orange Tiny Terror HW,
Fender elite Start, Gibson SG 61,fender telecaster

Previously Owned - Rocker 30

Posts: 155
Joined: Sat Apr 16, 2016 8:52 pm
Location: North Carolina, USA

Re: Excessive noise TH-30 Head

Post by Sootio » Thu Dec 20, 2018 9:55 pm

Be sure to check the 12at-7 for the effects loop as well.

Les Paul Lover
Duke of Orange
Posts: 6774
Joined: Tue Aug 18, 2009 9:08 am
Location: Derby, England

Re: Excessive noise TH-30 Head

Post by Les Paul Lover » Fri Dec 21, 2018 8:38 am

And whilst you can check that it is a power valve with just one spare EL84 as Ronnie suggested, if that is the issue, you will need to replace the whole set with a new matched quad.

Orange Gear: RV50 MKI, R30, AD15, AD5, PPC212
Past Orange: Orange AD30TC Combo, Tiny Terror

Guitars: Gibson Les Paul Standard Faded, Vigier Expert Retro 54, Gibson SG 70s Tribute, Aria Pro II RS X80, G&L ASAT Special Tribute

New Member
Posts: 12
Joined: Tue Oct 16, 2018 7:11 pm

Re: Excessive noise TH-30 Head

Post by Snowdogyyz » Fri Dec 21, 2018 11:56 pm

Thanks for the suggestions! I swapped around preamp tubes and power tubes and the amp simply lost volume on both channels and I couldn’t get it fixed with any of my tubes. Off to the amp tech it went today!

Post Reply

Who is online

Users browsing this forum: No registered users and 9 guests