Search found 11 matches
- Sat Jan 06, 2018 3:08 am
- Forum: Technical Discussion
- Topic: Bias circuit help
- Replies: 5
- Views: 491
Re: Bias circuit help
Yes sorry its the 180K resistor. and yes the bias voltage across the bias resistor - I replaced the 180K to a 220K and got 6.8mV on one side and 17mV on the other. I cannot get current to equalize on both sides. My understanding is that this is because there is too much negative voltage thus raising...
- Sat Jan 06, 2018 12:26 am
- Forum: Technical Discussion
- Topic: Bias circuit help
- Replies: 5
- Views: 491
Bias circuit help
Can someone help me with this bias circuit. I get about 14mV DC with the bias knob completely in one direction and only 5 mV DC in the other direction. I have changed out the 150K resitor to 470k to get this sweep. I need a greater sweep with this circuit. Should I still increase the "150K" resistor...
- Thu Jan 14, 2016 7:32 am
- Forum: Trainwreck Discussion
- Topic: Switchable Volume and MV
- Replies: 13
- Views: 2153
Re: Switchable Volume and MV
How about something like this. Not sure how it works. I know it the amp the footswitch cuts the signal. I don't understand JFETs but I presume they slowly make the connection of the resistor to ground. I would love someone to explain how the JFET works in this circuit
- Wed Jan 13, 2016 10:08 pm
- Forum: Trainwreck Discussion
- Topic: Switchable Volume and MV
- Replies: 13
- Views: 2153
Re: Switchable Volume and MV
Yes.
Higher Master Volume lower Volume - clean
Lower Master Volume higher Volume - dirty
Higher Master Volume lower Volume - clean
Lower Master Volume higher Volume - dirty
- Wed Jan 13, 2016 5:40 pm
- Forum: Trainwreck Discussion
- Topic: Switchable Volume and MV
- Replies: 13
- Views: 2153
Switchable Volume and MV
Anybody done a switchable Volume and MV for Liverpool? Any thoughts on the best way to wire this option. I know turning down the guitar volume cleans up the sound but a switchable option would give a clean with dynamic headroom.
Thanks
Daniel
Thanks
Daniel
- Wed Jan 13, 2016 5:39 pm
- Forum: Trainwreck Discussion
- Topic: Trainwreck Liverpool and Express Power PCB
- Replies: 7
- Views: 3270
- Fri Jan 08, 2016 9:33 pm
- Forum: Trainwreck Discussion
- Topic: Trainwreck Liverpool and Express Power PCB
- Replies: 7
- Views: 3270
Re: Trainwreck Liverpool and Express Power PCB
Do you have those ExpressPCB files?
Thanks
Daniel
Thanks
Daniel
- Sat Dec 05, 2015 4:25 pm
- Forum: Trainwreck Discussion
- Topic: Trainwreck Liverpool and Express Power PCB
- Replies: 7
- Views: 3270
Re: Trainwreck Liverpool and Express Power PCB
Ok no response. Does anyone know how to use eagle PCB software?
THX
THX
- Tue Dec 01, 2015 7:20 pm
- Forum: Trainwreck Discussion
- Topic: Pre-Express build questions...
- Replies: 6
- Views: 3108
Re: Pre-Express build questions...
As for chassis they are not going to affect the sound per say. An open chassis does give advantages of separating components. More cooling less crowding are important but there are diminishing returns. Therefore there is an adage of open spacing open sound. As for transformers I have used Classic To...
- Fri Nov 27, 2015 5:56 pm
- Forum: Trainwreck Discussion
- Topic: trainwreck trafos brand
- Replies: 12
- Views: 3121
Re: trainwreck trafos brand
I used Classic Tone transformers and they were great. THey have specs for the traniwreck and are click and order. Great stuff.
Daniel
Daniel
- Mon Nov 23, 2015 10:37 pm
- Forum: Trainwreck Discussion
- Topic: Trainwreck Liverpool and Express Power PCB
- Replies: 7
- Views: 3270
Trainwreck Liverpool and Express Power PCB
Does anyone have gerber files for the power section of a liverpool and express power section? If not can someone help me create one?
Thanks
Daniel
Thanks
Daniel