Newbie Trainwreck Question?
Moderators: pompeiisneaks, Colossal
Newbie Trainwreck Question?
I recently discovered the Trainwreck 4-4-0 on another forum and would like to build it or something possibly here that is equavilent. I believe due to the large forum activity on The Amp Garage I could get the help I will need along the way. Does a low wattage Trainwreck type amp schematic and files exist here? If so what is it called and have others built it or the 4-4-0. Thanks in advance. So glad I found this site. Looks like a wealth of knowledge here.
James
Re: Newbie Trainwreck Question?
The 4-4-0 is the creation of Cliff Chappell and others on the AX84.com forum. I have personally played Cliff's prototype. It used a 6SN7 dual triode for the power section and a custom Heyboer output transformer. I can report that it sounded and behaved quite similarly to a full sized EL34 based Express (which I have also built). Through a single 12" AX84 speaker enclosure it was plenty loud enough to make my ears ring.
I know others here have built the 4-4-0, just do a search. You can also find the documentation in the Associate Projects section of AX84.com.
I know others here have built the 4-4-0, just do a search. You can also find the documentation in the Associate Projects section of AX84.com.
- johnnyreece
- Posts: 993
- Joined: Thu Jan 26, 2012 2:05 am
- Location: New Castle, IN
Re: Newbie Trainwreck Question?
Here's a link to one I did. It's now my go-to amp. Absolutely sizzles with my Les Paul.
http://ampgarage.com/forum/viewtopic.ph ... 80&start=0
http://ampgarage.com/forum/viewtopic.ph ... 80&start=0
Re: Newbie Trainwreck Question?
Great. Glad to know others have built the 4-4-0. Sounds like you made a few changes. Did the separate caps work out instead of the multi-cap on the parts list.
Also, do you have any documentation on your build you could share?
Did you use the rotary switch to go between 4,8, 16 ohm speakers. I don't plan on having that option and instead using 3 separate output jacks.
I'm sitting here putting all the parts from the AX84 BOM list into an Excel file so that I can have the prices automatically add up for me and compare those costs between several sources at one look.
Also, do you have any documentation on your build you could share?
Did you use the rotary switch to go between 4,8, 16 ohm speakers. I don't plan on having that option and instead using 3 separate output jacks.
I'm sitting here putting all the parts from the AX84 BOM list into an Excel file so that I can have the prices automatically add up for me and compare those costs between several sources at one look.
James
- johnnyreece
- Posts: 993
- Joined: Thu Jan 26, 2012 2:05 am
- Location: New Castle, IN
Re: Newbie Trainwreck Question?
Yeah, the stack o' caps worked fine. Mine was more Trainwreck-ish in appearance than the 4-4-0. There was a pretty good suggestion from Romberg in that thread about reworking the PI to get more useable cleans, but I never had the gumption to do it. Any documentation I had on the build is in that thread. Feel free to ask any questions you might have, and I'll do my best to answer!
Re: Newbie Trainwreck Question?
Thanks so much. I'm sure I will have some along the way. How about the rotary switch, did you use that in the build?
James
- johnnyreece
- Posts: 993
- Joined: Thu Jan 26, 2012 2:05 am
- Location: New Castle, IN
Re: Newbie Trainwreck Question?
No, my OT only had one secondary tap, so I ditched the rotary switch in favor of having dual bias.