trinityamps.com

Trinity Amps Guitar Amp Forum
It is currently Fri Aug 07, 2020 8:42 am

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 16 posts ] 
Author Message
PostPosted: Mon Dec 16, 2019 10:02 am 
Offline
Friend
Friend

Joined: Tue Nov 05, 2019 4:31 pm
Posts: 25
I recently purchased a Triwatt from Reverb a few weeks ago. I am noticing that the clean channel is not properly clean, it always has a slight break up to it regardless of volume. Also when the overdrive is not engaged, when turning the pot between say 0-1 there's a slight noise that can be heard.
There is a back ground hum also, which disappears when the overdrive is engaged and also when I gently tap V3 there's a massive pop.

Thoughts please ?


Top
 Profile  
 
PostPosted: Tue Dec 17, 2019 9:24 am 
Offline
Friend
Friend

Joined: Tue Nov 05, 2019 4:31 pm
Posts: 25
I have solved the distortion issue. Had a look at the wiring in detail last night. It would seem whom ever built the amp wasn't too careful. The workmanship is a little rough in places on first look.
There were a couple of resistors, one on the bass pot and one of the other pots (forget which one) that was grounding against the pot itself. I moved them off, slid a little insulation tape in between just for good measure and it went away. The amp now sounds clean when it should so I have to assume that was the problem.
The only other issue I have now is that when the OD pot is on position 0 or 10 there's a buzz ? It happens when it's not engaged. Does anyone have any idea why this would be happening ?


Top
 Profile  
 
PostPosted: Wed Dec 18, 2019 9:40 am 
Offline
Friend
Friend

Joined: Tue Nov 05, 2019 4:31 pm
Posts: 25
Looked again last night. It seems a sharp solder point on V3 was piercing the insulation on cable on the terminal next to it. It was barely noticeable. Moved it out the way and voila. I'm going to have to rework this amp a little for my own piece of mind.

Just thought I'd pass this along in case anyone else comes across any of these issues.

I took out the EH tubes that were in it, which for some reason couldn't handle a muff pedal very well (it sounded like it was bogging down) and put in some old JJ's I had laying around. The difference was night/day.

I have new tubes on order. I have to say the amp sounds fantastic with the Thames speaker I have.


Top
 Profile  
 
PostPosted: Fri Dec 27, 2019 9:39 am 
Offline
Holy Ghost
Holy Ghost
User avatar

Joined: Sun Mar 13, 2005 4:10 pm
Posts: 7430
Location: Brighton, Canada
The. Triwatt is pretty sensitive to wiring and the OD can be one area to review. Also check the wire from the two pots that goes to the OD.

Attachment:
5BE351EE-2076-4935-B61C-1917A64C09AF.jpeg
5BE351EE-2076-4935-B61C-1917A64C09AF.jpeg [ 704.43 KiB | Viewed 1081 times ]

_________________
Stephen
Web: www.trinityamps.com. Facebook: facebook.com/trinityamps. Twitter: @trinityamps


Top
 Profile  
 
PostPosted: Fri Dec 27, 2019 12:49 pm 
Offline
Friend
Friend

Joined: Tue Nov 05, 2019 4:31 pm
Posts: 25
Thank you for the reply. I noticed the master volume center pin is loose/wobbly and causes noise. My guess, over heating with the soldering iron. I've ordered an ALPS Blue Beauty to replace it, should be here tomorrow. It's obviously affecting the output volume too I've noticed.
Is there a full wiring layout available anywhere, I'd like to tidy this up and reduce any possible noise as much as I can.


Top
 Profile  
 
PostPosted: Fri Dec 27, 2019 2:30 pm 
Offline
Expert
Expert

Joined: Sat Dec 04, 2010 3:42 pm
Posts: 501
Location: Qualicum Beach, BC
Yes, sloppy wiring and poor soldering causes lots of problems.

Links to layouts, schematics, and build guides for all Trinity amps are on the Support page.
http://www.trinityamps.com/support/


Top
 Profile  
 
PostPosted: Mon Dec 30, 2019 5:03 pm 
Offline
Friend
Friend

Joined: Tue Nov 05, 2019 4:31 pm
Posts: 25
Corrected the wiring on the overdrive per the diagram. Needless to say it most definitely wasn't in a straight line !! I also replaced the master volume pot with the ALPS...very nice upgrade ! although it's a stereo pot and you only get to use one channel but even so, very open and clear sounding.

The only thing I notice now is the treble pot makes a weird sound when turned up full and cuts out completely, bad pot perhaps ? I'll be changing that when I get time, not that I max it out but I'd like it to work properly.


Top
 Profile  
 
PostPosted: Mon Dec 30, 2019 5:38 pm 
Offline
Holy Ghost
Holy Ghost
User avatar

Joined: Sun Mar 13, 2005 4:10 pm
Posts: 7430
Location: Brighton, Canada
Let us know how that works after replacement.

_________________
Stephen
Web: www.trinityamps.com. Facebook: facebook.com/trinityamps. Twitter: @trinityamps


Top
 Profile  
 
PostPosted: Thu Jun 04, 2020 4:28 pm 
Offline
Friend
Friend

Joined: Tue Nov 05, 2019 4:31 pm
Posts: 25
Sorry for the long delay on replying to this. I think I found the issue. The overdrive stopped working when I pull the switch. Turns out that pin 3 on the pot is loose, intermittent.
I just ordered a replacement so I'm hoping that is causing the problem. I do have a replacement treble pot in case that's not it.


Top
 Profile  
 
PostPosted: Mon Jun 08, 2020 11:25 pm 
Offline
Friend
Friend

Joined: Tue Nov 05, 2019 4:31 pm
Posts: 25
Just replaced the push/pull pot/switch. Problem solved. Everything working as it should. I noticed there was a loose pin on V2 so changed the socket also. Probably due to over heating..there seems to have been a few connections like that in this amp. I'm wondering if the guy's iron was too hot or maybe he just held the heat on for too long ? In either case, everything's fine.


Last edited by intothefloyd on Tue Jun 09, 2020 4:20 pm, edited 1 time in total.

Top
 Profile  
 
PostPosted: Tue Jun 09, 2020 8:14 am 
Offline
Holy Ghost
Holy Ghost
User avatar

Joined: Sun Mar 13, 2005 4:10 pm
Posts: 7430
Location: Brighton, Canada
All good then. Good job at getting it going again.

_________________
Stephen
Web: www.trinityamps.com. Facebook: facebook.com/trinityamps. Twitter: @trinityamps


Top
 Profile  
 
PostPosted: Tue Jun 09, 2020 4:29 pm 
Offline
Friend
Friend

Joined: Tue Nov 05, 2019 4:31 pm
Posts: 25
One other thing, I noticed that where the signal cable from the input jacks connect to V1. I was seeing a slight drop in signal/volume.
If I touched the cable it would jump back up. I eventually spotted a couple of strands of the shielding barely touching the input pin on the socket. This would also affect the controls , causing some of them to pop slightly at max/min settings.
I re-terminated the cable and it's good.
It just seemed like there were a few small things going on with this build. I am hoping that's it all cleared up.


Top
 Profile  
 
PostPosted: Fri Jun 12, 2020 8:04 pm 
Offline
Friend
Friend

Joined: Wed May 22, 2019 4:26 am
Posts: 25
Location: The Netherlands
I guess it would be a good Idea to check all internal wiring thoroughly. Especially if you are going to do live gigs.

No offense, but you stated a a couple of small defects caused by sloppy work. It will do no harm to check all joints and perhaps re-solder some bad ones. Last thing you want is a failing amp when you are about to start your beloved 6 minutes comfortbaly numb solo in a live situation.

Geel free to post some pics. I'll be happy to take a look as well if you want! ;-)

Cheers


Top
 Profile  
 
PostPosted: Sat Jun 13, 2020 3:01 pm 
Offline
Friend
Friend

Joined: Tue Nov 05, 2019 4:31 pm
Posts: 25
Hey, I am not at all offended, it's sound advice.
I think you're absolutely correct in what you say. My plan is at some point I will get some nice silver plated OFC PTFE cable and re-work the entire amp, I'd also use decent solder, WBT or Mundorph. I think I may be updating the OT so I can use EL34'S so I may take the opportunity to do it all then.
We had a big show scheduled for Ohio this month but thanks to COVID that along with a few others have been cancelled....I'm not sure I'd have traveled with the amp out of state like that anyhow. It's not about the $$$$ but we have lost so much :(
I typically use a stereo set up which would now be the Triwatt and my MK3 Mesa, if I was to do a long distance show like the Ohio one. I'd take a third as back up,what's one more lol


Attachments:
band2.jpg
band2.jpg [ 125.62 KiB | Viewed 487 times ]
band.jpg
band.jpg [ 41.05 KiB | Viewed 487 times ]
Top
 Profile  
 
PostPosted: Fri Jun 19, 2020 9:33 pm 
Offline
Expert
Expert

Joined: Sat Dec 04, 2010 3:42 pm
Posts: 501
Location: Qualicum Beach, BC
Thanks for the update and the photos. I take it you play in a Pink Floyd tribute band. A Triwatt running EL34s would be great for that. Hopefully you got all the bugs out of yours.


Top
 Profile  
 
PostPosted: Sat Jun 20, 2020 6:15 pm 
Offline
Friend
Friend

Joined: Tue Nov 05, 2019 4:31 pm
Posts: 25
Yes Mitch I do, band has the same name as my user name.. That's the plan, EL34's !!! All going well we'll get to play again in August.


Attachments:
itf.jpg
itf.jpg [ 67.23 KiB | Viewed 399 times ]
Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 16 posts ] 

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 1 guest


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 post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Group