trinityamps.com

Trinity Amps Guitar Amp Forum
It is currently Thu Mar 28, 2024 3:44 pm

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 4 posts ] 
Author Message
PostPosted: Tue Apr 02, 2019 8:03 pm 
Offline
Friend
Friend

Joined: Fri Apr 13, 2018 7:46 am
Posts: 19
Very low, like ear up to my 4x12 to hear it low. I had this issue, couldn’t suss it out so I rebuilt it again from scratch using no similar parts except for jacks and transformers... but still have the same issue.

I made a temporary “preamp out” just before the PI and sent it to a separate power amp and it sounds great, so I don’t believe the problem lies within the preamp section.

Here are the handwritten “actual” voltages I am getting.

I’m out of ideas, can anyone steer me in a direction??

Image


Top
 Profile  
 
PostPosted: Wed Apr 03, 2019 11:07 am 
Offline
Experienced
Experienced
User avatar

Joined: Wed Aug 26, 2009 11:27 pm
Posts: 273
Location: Ontario
Check the values of PI cathode resistor make sure its R not K

A picture of the build might help as Well


Top
 Profile  
 
PostPosted: Sat Jul 20, 2019 8:06 pm 
Offline

Joined: Sat Jul 20, 2019 7:59 pm
Posts: 1
Hello,

I had a similar problem with a new build...amp worked properly except volume was low. Chopsticking the wiring revealed a bad solder connection on the jumper between pin 8 and 3 on the PI...tapping that wire induced a loud pop out of the speaker. After resoldering that wire, the amp worked perfectly. Hopefully you got the amp working!


Top
 Profile  
 
PostPosted: Mon Jul 22, 2019 10:00 am 
Offline
Holy Ghost
Holy Ghost
User avatar

Joined: Sun Mar 13, 2005 4:10 pm
Posts: 7519
Location: Canada
What is the cathode voltage on the 6V6's . Is it 22 or close per spec??

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


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 4 posts ] 

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: Google [Bot] and 11 guests


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:  
Powered by phpBB® Forum Software © phpBB Group