trinityamps.com

Trinity Amps Guitar Amp Forum
It is currently Thu Oct 31, 2024 7:48 pm

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 13 posts ] 
Author Message
 Post subject: TC-15 favorite mods
PostPosted: Mon Sep 01, 2014 10:20 am 
Offline
Friend
Friend

Joined: Mon Aug 25, 2014 11:09 am
Posts: 12
Having a blast with my recently completed TC-15! Just to pass along some info and favorite mods:
1) Having really good luck with a Winged-C brand EF-86 tube (tried another by EH and it was problematic).
2) Love the compression on EF-86 channel with the suggested mod of R33 to 220K and R34 to 1M. With the original grid resistors, the EF-86 channel sounded very much like the 12AX7 channel. Now with new grid resistors, it's got a great, sustaining compression that reminds me of the Vince Gill and Brad Paisley Tele sound.
3) Decided to change up the tone controls a bit. I put a Matchless Spitfire-style tone on the EF-86 channel... 1-meg pot with .01 cap to ground... then I modified the contour switch to 3 positions and put it in the 12AX7 channel as a mid control. Using a pot in place of the R10 10K pot, I found that I liked the mid-boost at 10K, 15K and 20K. Put those values on the contour switch... and now I can switch-in the standard 10K mid value, or "hotter and hottest" mids with the 3-positions. I located the switch in the channel's low gain input hole - I never used it anyway.
I have an original 67 Fender Princeton Reverb, an R.I. Fender Bassman with a point-to-point board and a kit-built 18 watt TMB... but now the TC-15 is my favorite of the bunch. Thanks for a great kit, Trinity! :thumbsup:


Top
 Profile  
 
 Post subject: Re: TC-15 favorite mods
PostPosted: Mon Sep 01, 2014 2:01 pm 
Offline
Expert
Expert
User avatar

Joined: Sun Feb 17, 2008 4:47 pm
Posts: 960
Location: Toronto, Canada.
I really like that EF86 screen grid/divider mod too!

-The cascade mod for the 12AX7 channel is cool, it's been done a couple times. Search for it
-You can use the boost switch at the back to do all kinds of things, add bypass caps, change the value of bypass caps, change cathode resistors, etc.
-VRM
-I found the stock values for the bright caps didn't suit me so I lowered them, might be forth considering.

Some other cool potential mods...effects loop, reverb, switchable rectifiers, choke, etc.

_________________
http://pdfelectronics.com


Top
 Profile  
 
 Post subject: Re: TC-15 favorite mods
PostPosted: Mon Sep 01, 2014 8:16 pm 
Offline
Experienced
Experienced
User avatar

Joined: Tue Mar 25, 2014 3:55 pm
Posts: 214
Location: Central California
I like the RFT I currently have in mine. I tried a JJ at first... meh... I thought it sounded good until I put the RFT in there!

Gwydir wrote:
2) Love the compression on EF-86 channel with the suggested mod of R33 to 220K and R34 to 1M. With the original grid resistors, the EF-86 channel sounded very much like the 12AX7 channel. Now with new grid resistors, it's got a great, sustaining compression that reminds me of the Vince Gill and Brad Paisley Tele sound.


I'll have to give that a try.


Gwydir wrote:
Thanks for a great kit, Trinity! :thumbsup:


Ditto! :thumbsup:


Top
 Profile  
 
 Post subject: Re: TC-15 favorite mods
PostPosted: Tue Sep 02, 2014 2:09 pm 
Offline
Holy Ghost
Holy Ghost
User avatar

Joined: Sun Mar 13, 2005 4:10 pm
Posts: 7519
Location: Canada
Use a bigger value cap in the cut . Even double it

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


Top
 Profile  
 
 Post subject: Re: TC-15 favorite mods
PostPosted: Wed Sep 03, 2014 7:16 pm 
Offline
Friend
Friend

Joined: Mon Aug 25, 2014 11:09 am
Posts: 12
So many amps are a "one trick pony"... but this TC-15 does just about everything well. Very inspiring!


Top
 Profile  
 
 Post subject: Re: TC-15 favorite mods
PostPosted: Wed Sep 03, 2014 10:35 pm 
Offline
Holy Ghost
Holy Ghost
User avatar

Joined: Sun Mar 13, 2005 4:10 pm
Posts: 7519
Location: Canada
Gwydir wrote:
So many amps are a "one trick pony"... but this TC-15 does just about everything well. Very inspiring!


:thumbsup: :)

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


Top
 Profile  
 
 Post subject: Re: TC-15 favorite mods
PostPosted: Wed Sep 17, 2014 8:55 am 
Offline
Friend
Friend

Joined: Mon Aug 25, 2014 11:09 am
Posts: 12
Tried a new mod this week... found it online: a "squish" control on the EF86 channel. Works to add compression and drive without much distortion... much to my liking. Out of pin one of the EF86, find a .1uf cap to ground. Between the cap and ground, add a 500k pot... cap to pin one (on the pot)... with pot pins two and three to ground. Simple - and it sounds great!


Top
 Profile  
 
 Post subject: Re: TC-15 favorite mods
PostPosted: Wed Sep 17, 2014 9:11 am 
Offline
Holy Ghost
Holy Ghost
User avatar

Joined: Sun Mar 13, 2005 4:10 pm
Posts: 7519
Location: Canada
Gwydir wrote:
Tried a new mod this week... found it online: a "squish" control on the EF86 channel. Works to add compression and drive without much distortion... much to my liking. Out of pin one of the EF86, find a .1uf cap to ground. Between the cap and ground, add a 500k pot... cap to pin one (on the pot)... with pot pins two and three to ground. Simple - and it sounds great!



That's cool, where did you find that one?

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


Top
 Profile  
 
 Post subject: Re: TC-15 favorite mods
PostPosted: Wed Sep 17, 2014 9:26 am 
Offline
Friend
Friend

Joined: Mon Aug 25, 2014 11:09 am
Posts: 12
Think I saw a mention on AX84.com... but had to Google it to find more info. There's also a video on Youtube of a guy playing a homemade amp with the "squish" mod on an EF86.


Top
 Profile  
 
 Post subject: Re: TC-15 favorite mods
PostPosted: Wed Sep 17, 2014 9:38 am 
Offline
Friend
Friend

Joined: Mon Aug 25, 2014 11:09 am
Posts: 12
Here's a link to the YouTube video I mentioned: https://www.youtube.com/watch?v=5gnbda0FyTc


Top
 Profile  
 
 Post subject: Re: TC-15 favorite mods
PostPosted: Fri Sep 26, 2014 11:04 am 
Offline
Friend
Friend

Joined: Mon Aug 25, 2014 11:09 am
Posts: 12
Found a new favorite mod for TC-15... a "Daisy-Chain" switch. Found it on an amp schematic shown here: https://taweber.powweb.com/store/lenora_schem.jpg
I didn't use the crunch switch, so I subbed it for this mod. Daisy Chain allows stock inputs in one switch position... and both channel inputs blended together (from channel one input) at the other position. I really liked the sound of combined channels (using an external a-b-y switch box...) so I thought the daisy chain would make it even easier - with less 'stuff' to carry around. It sounds fantastic! Combining the mid-heavy channel one with the bass and treb of channel two gives many more tone possibilities than either channel played alone. And now they're both there, by simply plugging into channel one and flipping the daisy chain switch! When you check the link, there's also a layout that shows exactly how to wire the switch. Had to change ground wiring on the Channel two input to make it work. Try it and have fun everyone!


Top
 Profile  
 
 Post subject: Re: TC-15 favorite mods
PostPosted: Fri Sep 26, 2014 8:13 pm 
Offline
Expert
Expert
User avatar

Joined: Sun Feb 17, 2008 4:47 pm
Posts: 960
Location: Toronto, Canada.
Agreed very cool mod. The channels work nicely when blended

I prefer an A/B box though so I can switch on the fly.

_________________
http://pdfelectronics.com


Top
 Profile  
 
 Post subject: Re: TC-15 favorite mods
PostPosted: Fri Sep 26, 2014 11:19 pm 
Offline
Holy Ghost
Holy Ghost
User avatar

Joined: Sun Mar 13, 2005 4:10 pm
Posts: 7519
Location: Canada
Doing by ABY pedal is my choice to, but a cool mod to put on a pul switch on the front perhaps.

_________________
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  [ 13 posts ] 

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 36 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