trinityamps.com

Trinity Amps Guitar Amp Forum
It is currently Tue Jul 16, 2024 3:21 pm

View unanswered posts | View active topics


Board index » On Stage » 18 Watt

All times are UTC - 5 hours [ DST ]



Post new topic Reply to topic  Page 1 of 1
  [ 7 posts ] 
  Previous topic | Next topic 
Author Message
synthetic
 Post subject: No sound from sIII
PostPosted: Sun Nov 04, 2007 7:04 pm 
Offline
Friend
Friend

Joined: Fri Aug 04, 2006 12:42 pm
Posts: 46
I'm having trouble with my sIII (Rev11). There's no audio from the unit. If I remove the tubes (except the regulator) I get around 400VDC on pins 1 and 6 of V1 and V2. B+ voltage is 410V, V4 and V5 look more or less correct. I can't find any shorts or problems on the board, any ideas?

Thanks,-jl
Top
 Profile  
 
synthetic
 Post subject:
PostPosted: Sun Nov 04, 2007 7:44 pm 
Offline
Friend
Friend

Joined: Fri Aug 04, 2006 12:42 pm
Posts: 46
Forget it, I tracked it down.
Top
 Profile  
 
bibleboy3
 Post subject:
PostPosted: Sun Nov 04, 2007 11:02 pm 
Offline
Novice
Novice

Joined: Thu May 17, 2007 9:18 pm
Posts: 61
what was the problem

_________________
My future's so bright I gotta wear shades
Top
 Profile  
 
coco
 Post subject:
PostPosted: Sun Nov 04, 2007 11:42 pm 
Offline
Holy Ghost
Holy Ghost
User avatar

Joined: Sun Mar 13, 2005 4:10 pm
Posts: 7519
Location: Canada
Yeah, I wanna know too!!

_________________
Stephen
Web: www.trinityamps.com. Facebook: facebook.com/trinityamps. Twitter: @trinityamps
Top
 Profile  
 
synthetic
 Post subject:
PostPosted: Wed Nov 07, 2007 7:52 pm 
Offline
Friend
Friend

Joined: Fri Aug 04, 2006 12:42 pm
Posts: 46
Intermittent short from TMB inputs to V1. That funky period wire.

Another weird problem with my unit is that the Hi input to the 18W channel has never worked. I've tried re-connecting all of those wires and even replacing the jack, but it still doesn't work. The wiring is exactly the same as on the TMB channel. I changed the design so that the hi input is on top and the lo input is on the bottom when the amp head is upright (refersed from your design). Other than that, it's a bone stock sIII.
Top
 Profile  
 
synthetic
 Post subject:
PostPosted: Wed Nov 07, 2007 7:59 pm 
Offline
Friend
Friend

Joined: Fri Aug 04, 2006 12:42 pm
Posts: 46
Are there any mods I should look at from rev 11 to present? I hear some slight motorboating noise as well.
Top
 Profile  
 
coco
 Post subject:
PostPosted: Thu Nov 08, 2007 8:33 am 
Offline
Holy Ghost
Holy Ghost
User avatar

Joined: Sun Mar 13, 2005 4:10 pm
Posts: 7519
Location: Canada
synthetic wrote:
Are there any mods I should look at from rev 11 to present?


Not really unless you didnt have a boost circuit.

synthetic wrote:
I hear some slight motorboating noise as well.


Your amp is not very old but typically in an amplifier that has worked correctly, motorboating may be a sign that the decoupling capacitors in the B+ lines of the preamp section are not decoupling properly. You might replace the B+ decoupling capacitors at least for the preamp.

_________________
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  Page 1 of 1
  [ 7 posts ] 

Board index » On Stage » 18 Watt

All times are UTC - 5 hours [ DST ]

Who is online

Users browsing this forum: No registered users and 8 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