Search found 1914 matches
- Fri Apr 26, 2024 9:57 am
- Forum: Technical Discussion
- Topic: Does anyone recognize this amp design?
- Replies: 10
- Views: 368
Re: Does anyone recognize this amp design?
It is a mess inside, but I think it looks fantastic.
- Mon Apr 22, 2024 8:57 pm
- Forum: Technical Discussion
- Topic: Illinois brand capacitors still bad?
- Replies: 10
- Views: 354
Re: Illinois brand capacitors still bad?
Were the capacitors themselves bad? Or was it just that Fender used the lower temperature 85Degree ones?
- Sat Apr 13, 2024 2:09 pm
- Forum: Marshall Discussion
- Topic: Raspy treble from 2203 amp
- Replies: 6
- Views: 286
Re: Raspy treble from 2203 amp
That master volume mod doesn't actually help, I did some tests on this a few years ago with a spectrum analyser and found it made no difference. But YMMV. Dave Friedman puts a 500pF cap across the cathode follower 100K, lowers the first coupling cap to .0022uF, adds a 22uF to the final stage cathode...
- Sat Apr 06, 2024 12:22 pm
- Forum: Technical Discussion
- Topic: Plexi treble pot does nothing
- Replies: 12
- Views: 289
Re: Plexi treble pot does nothing
Is it just the treble control that has no effect? Do mid and bass work?
- Tue Mar 12, 2024 11:11 am
- Forum: Trainwreck Discussion
- Topic: Nuke Deluxe vs Express
- Replies: 2
- Views: 271
Nuke Deluxe vs Express
I was recently messing with Trainwreck designs in LTspice and noticed something interesting. The frequency response of the Nuke Deluxe design on here is very similar to an Express ran with the volume at halfway and the 500pF bright switch on. Just thought that was interesting given that's how Glen r...
- Sat Mar 09, 2024 7:43 pm
- Forum: Trainwreck Discussion
- Topic: Trainwreck Champ ? (Dirty Little Monster)
- Replies: 8
- Views: 654
Re: Trainwreck Champ ? (Dirty Little Monster)
The main problem was that the parts count and assembly labor was nearly the same as a Komet 60, for example, as was the size and cost of the big transformers. This is what puts me off building a single ended amplifier for myself. Once I add up the cost of the transformers and parts I feel like I ma...
- Sun Mar 03, 2024 4:03 pm
- Forum: Trainwreck Discussion
- Topic: Trainwreck Champ ? (Dirty Little Monster)
- Replies: 8
- Views: 654
Re: Trainwreck Champ ? (Dirty Little Monster)
Yeah very little information out there regarding these am afraid Andy. I know Hogy from Komet built one but was only happy with it after much tweaking. I've never seen a schematic or gut shot.
- Sat Feb 24, 2024 3:53 pm
- Forum: Trainwreck Discussion
- Topic: 2xEL84 Liverpuddle
- Replies: 14
- Views: 5074
Re: 2xEL84 Liverpuddle
Done a really nice job on that one! And great you've dialled it in to your liking now. All that's left to do is play....................or start planning the next build
- Fri Feb 02, 2024 10:40 am
- Forum: Speakers and Cabinets
- Topic: Video: Is new speaker break in necessary?
- Replies: 7
- Views: 998
Re: Video: Is new speaker break in necessary?
Here's another good video on it.
https://www.youtube.com/watch?v=P4grDEC ... BidXJuIGlu
https://www.youtube.com/watch?v=P4grDEC ... BidXJuIGlu
- Tue Dec 12, 2023 8:46 am
- Forum: Technical Discussion
- Topic: My Champ has a sound problem
- Replies: 25
- Views: 10163
Re: My Champ has a sound problems
If you can record the problem it would be really useful and some gut shots please
- Sun Dec 03, 2023 10:08 am
- Forum: Trainwreck Discussion
- Topic: Weird note decay - Express build
- Replies: 41
- Views: 12578
Re: Weird note decay - Express build
Ah, found a way to listen. Yes sounds like instability or maybe a bad connection somewhere. Will have to see once you’ve finished rebuilding.
- Sun Dec 03, 2023 10:06 am
- Forum: Trainwreck Discussion
- Topic: Weird note decay - Express build
- Replies: 41
- Views: 12578
Re: Weird note decay - Express build
Only things jumping out in that pic are: - Your grounds, looks like you’re using the jack sockets as ground points. - Spare secondary is a bit close to the split wiring. - Maybe what appears to be your OT primary is very long. I haven’t been able to listen to the recording yet (soundcloud is forcing...
- Sat Dec 02, 2023 11:51 pm
- Forum: Trainwreck Discussion
- Topic: Weird note decay - Express build
- Replies: 41
- Views: 12578
Re: Weird note decay - Express build
It’s normal to hear some sound without a speaker. I think it comes from the OT.
Use Silver Mica, don’t use Ceramic.
Are you rebuilding it as an Express again?
Use Silver Mica, don’t use Ceramic.
Are you rebuilding it as an Express again?
- Tue Nov 28, 2023 3:16 pm
- Forum: Trainwreck Discussion
- Topic: Express vs Asteroid? Komet?
- Replies: 26
- Views: 3966
Re: Express vs Asteroid? Komet?
Yeah absolutely the divider reduces gain. You go from the Express configuration which is basically no divider allowing full signal through, to the Komet voltage divider that cuts signal almost in half. I have no first hand experience of an actual Komet though so can't comment on tonal differences, b...
- Tue Nov 28, 2023 8:40 am
- Forum: Trainwreck Discussion
- Topic: Express vs Asteroid? Komet?
- Replies: 26
- Views: 3966
Re: Express vs Asteroid? Komet?
It would retain the cleanup if you changed the divider between the stages as well.