trinityamps.com

Trinity Amps Guitar Amp Forum
It is currently Thu Mar 28, 2024 6:56 pm

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 9 posts ] 
Author Message
PostPosted: Tue Mar 07, 2006 10:47 pm 
Offline
Novice
Novice
User avatar

Joined: Tue Mar 22, 2005 8:56 am
Posts: 126
Location: Virginia
8)

I've been thinking for over a year about building Tweed Champ Based Class A WoodCross Amp. My daughter is getting the prototype. :D Meet the partner for the project Str@ I gave her for Christ-mass:

Image
Image
Image

I started with a basic 5F1 Layout. Increased the filtering in the power stage and basic preamp values are pretty standard Champ. I added a Spitfire/Thunderbolt Volume and Tone Control and a Master Volume simular to the Bluesbuster Supreme SE (to keep her mom happy) that acts upon the Power Tube's Control Grid. The Output Transformer is the same as BBSSE, not a puny Champ OT. Added the BBSSE Clean/Mean Switch which happens to work more efficiently in this amp.

She idles about 25 to 50 volts higher than a standard Tweed Champ and that adds mo Clean Headroom. She is wired with my BBSSE Hi/Lo Power Switch so she can not only run a 6V6, but also 6L6/5881 and EL34/6CA7 Power Tubes.

While in the guts, I experimented with a Voicing Control using different Bypass Caps on the First Gain Stage and the Hot Switch from the Version 3 Thunderbolt amps. They work great but I decided to not add them to Mandi's amp because I want it to be simple as can be for her. These will be added as an option to or may be standard in production Thunderchamps though.


CR ><>

_________________
WoodCross Amps

http://www.geocities.com/woodcrossamps/


Top
 Profile  
 
 Post subject:
PostPosted: Tue Mar 07, 2006 10:55 pm 
Offline
Expert
Expert
User avatar

Joined: Sat Jun 11, 2005 6:34 pm
Posts: 746
Location: 31°45'32.69"S 115°46'51.29"E Perth, Australia
Interesting, I am considering either a champ or a deluxe for my daughter who has just taken an interest in my telecaster. She finds the guitar is just the right size and weight for her so I guess I can kiss that one goodbye :-)


Top
 Profile  
 
 Post subject:
PostPosted: Wed Mar 08, 2006 10:34 pm 
Offline
Holy Ghost
Holy Ghost
User avatar

Joined: Sun Mar 13, 2005 4:10 pm
Posts: 7519
Location: Canada
Cool little amp. Wouldn't mind hearing some clips some day.

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


Top
 Profile  
 
 Post subject:
PostPosted: Tue Mar 21, 2006 2:20 pm 
Offline
Novice
Novice
User avatar

Joined: Tue Mar 22, 2005 8:56 am
Posts: 126
Location: Virginia
Legin wrote:
Interesting, I am considering either a champ or a deluxe for my daughter who has just taken an interest in my telecaster. She finds the guitar is just the right size and weight for her so I guess I can kiss that one goodbye :-)


:lol: I hear ya Bro! It was the same with my Black Str@.

CR ><>

_________________
WoodCross Amps

http://www.geocities.com/woodcrossamps/


Top
 Profile  
 
 Post subject:
PostPosted: Tue Mar 21, 2006 2:25 pm 
Offline
Novice
Novice
User avatar

Joined: Tue Mar 22, 2005 8:56 am
Posts: 126
Location: Virginia
coco wrote:
Cool little amp. Wouldn't mind hearing some clips some day.


Stephen;

I'll see what I can do about a few clips once I get the speaker in for it. It is a mean lil machine with either an old RCA Blackplate 6V6GT or JJ 6V6S. It's absolutely BAD with a JJ EL34L!

CR ><>

_________________
WoodCross Amps

http://www.geocities.com/woodcrossamps/


Top
 Profile  
 
 Post subject:
PostPosted: Tue Mar 21, 2006 2:35 pm 
Offline
Holy Ghost
Holy Ghost
User avatar

Joined: Sun Mar 13, 2005 4:10 pm
Posts: 7519
Location: Canada
Sounds like a Champ with a Sptifire front-end. Would that 'sort of' sum it up?

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


Top
 Profile  
 
 Post subject:
PostPosted: Thu Mar 23, 2006 3:00 pm 
Offline
Novice
Novice
User avatar

Joined: Tue Mar 22, 2005 8:56 am
Posts: 126
Location: Virginia
coco wrote:
Sounds like a Champ with a Sptifire front-end. Would that 'sort of' sum it up?


Stephen;

Yep, that would sorta sum it up. Mandi's amp has 2 to 3 times the filtering as a standard 5F1 Champ. 47uF>22uF>16uF and the first node resistor is an 8K2 instead of a 10K. This is one of the quietest amps I have ever built. Since the pics were taken, I have removed the 22uF Bypass Cap from the first stage for a bit more clean headroom.

Yep, Basically a Spitfire Front End. 470P Bright Cap instead of 180P. Changed the BIG Orange Drop .01pF on the Tone Control for a much smaller Xicon. It also has a Master Volume that Pat at STF shared with me that he offers with his Champ kits as an option.

I stuffed a board last night to build one of these for myself and this amp will contain all the mods that I have not used on her amp. Voicing Control on the first stage using caps. NFB Switch, Hot Switch to kill the Tone Control.

Thanks!!!
CR ><>

_________________
WoodCross Amps

http://www.geocities.com/woodcrossamps/


Top
 Profile  
 
 Post subject:
PostPosted: Fri Mar 24, 2006 8:52 am 
Offline
Holy Ghost
Holy Ghost
User avatar

Joined: Sun Mar 13, 2005 4:10 pm
Posts: 7519
Location: Canada
I would be interesting to hear this little guy cranked.

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


Top
 Profile  
 
PostPosted: Sun Jul 22, 2018 10:02 pm 
Offline
Experienced
Experienced

Joined: Fri Jul 29, 2005 11:35 pm
Posts: 424
Location: S of Buffalo, NY
SPAM!!


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 9 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