Search found 2987 matches
- Tue Apr 09, 2024 4:41 am
- Forum: Trainwreck Discussion
- Topic: Where to find Trainwreck Logos?
- Replies: 58
- Views: 7727
Re: Where to find Trainwreck Logos?
Malou is a very interesting example. The pots themselves are a great source of consideration for me as they each appear to have been selected for a reason. Either that or they were just sourced from a box of various pots! I know that Marshall used the "hot shield" regularly in their cascaded amps i...
- Tue Apr 02, 2024 5:05 am
- Forum: Trainwreck Discussion
- Topic: Why did it take me 15 years to try a 12ay7 in my Liverpool?
- Replies: 8
- Views: 1293
Re: Why did it take me 15 years to try a 12ay7 in my Liverpool?
Did you try the vintage/fast switch. That reduces the output from the second stage.
- Tue Apr 02, 2024 5:03 am
- Forum: Trainwreck Discussion
- Topic: Where to find Trainwreck Logos?
- Replies: 58
- Views: 7727
Re: Where to find Trainwreck Logos?
One mod that doesn't get any love is the Maloo picture where there is a small ceramic cap in series with a ten turn pot across the 100K plate resistor of the second triode stage. It was for high output pickups, but I noticed (depending on the cap value) it can boost bass after the tone controls. I h...
- Wed Mar 27, 2024 11:33 am
- Forum: Technical Discussion
- Topic: Knight 600 valve emissions tester thoughts?
- Replies: 5
- Views: 446
- Wed Mar 27, 2024 9:14 am
- Forum: Technical Discussion
- Topic: Knight 600 valve emissions tester thoughts?
- Replies: 5
- Views: 446
Re: Knight 600 valve emissions tester thoughts?
I have using it for a couple of days and I have yet to see a bad valve. I was wondering what is going on.
- Mon Mar 25, 2024 11:45 am
- Forum: Trainwreck Discussion
- Topic: Where to find Trainwreck Logos?
- Replies: 58
- Views: 7727
Re: Where to find Trainwreck Logos?
:evil: I agree that Ken had a standard circuit with given values and materials that were the basis of the amp models he developed. I also know that my 70 JMP50 doesn't sound the same am my 76 JMP50 even though they are the same circuits. I'm accepting that some of the components in each vary in thei...
- Mon Mar 25, 2024 1:38 am
- Forum: Technical Discussion
- Topic: Knight 600 valve emissions tester thoughts?
- Replies: 5
- Views: 446
Knight 600 valve emissions tester thoughts?
I have been given a Knight 600 tester. I REALLY appreciate being given it, but I haven’t yet found it to be a meaningful tester, it is early days using it, but I thought I would put the question to the brains trust here and see if there are tips or tricks surrounding using the tester. https://youtu....
- Mon Mar 25, 2024 1:33 am
- Forum: Trainwreck Discussion
- Topic: Where to find Trainwreck Logos?
- Replies: 58
- Views: 7727
Re: Where to find Trainwreck Logos?
I think when he said there's no mojo, it's science, he meant there's no magic pixie dust .. so many silly things have been said about these amps and Ken was playing with people when he said things like red wire sounds better etc etc. It's in the design. Caps , resistors, layout. Not mojo or magic.....
- Sun Mar 24, 2024 7:03 am
- Forum: Trainwreck Discussion
- Topic: Where to find Trainwreck Logos?
- Replies: 58
- Views: 7727
Re: Where to find Trainwreck Logos?
What variables in the circuit? The amps are almost identical circuit wise. Like you said, almost identical circuit wise. Variables such as, resistor/capacitor additions/value variations, transformer variants, pot values/tapers, presence circuit variations, filtering, tubes and various layout and ma...
- Mon Mar 18, 2024 9:18 am
- Forum: Trainwreck Discussion
- Topic: Where to find Trainwreck Logos?
- Replies: 58
- Views: 7727
Re: Where to find Trainwreck Logos?
There is mojo to those amps, but it doesn't reside in the badge. You must lay them out correctly and most likely have to tweak the wiring to get the goods out of it, particularly, the tone stack wiring. The wires from the tone control caps is almost directly wired to the pots. I would have thought ...
- Mon Mar 18, 2024 9:07 am
- Forum: Trainwreck Discussion
- Topic: Where to find Trainwreck Logos?
- Replies: 58
- Views: 7727
Re: Where to find Trainwreck Logos?
I agree that Kens amps had an abundance of mojo. All that I have heard have been fine sounding amps but a few really stand out to me as what I look for in a Trainwreck. They may not be the examples that are others favorites. Ken built amps for many individuals with the intention of it being an amp ...
- Tue Mar 12, 2024 2:40 am
- Forum: Trainwreck Discussion
- Topic: Trainwreck Champ ? (Dirty Little Monster)
- Replies: 8
- Views: 891
Re: Trainwreck Champ ? (Dirty Little Monster)
Has anyone seen the AX-84 single ended amps. They sounded pretty good too. Don’t think it’s worth trying to chase down the DLM amp.
https://youtu.be/u_MBHfKI3cw?si=jx03nAi5Q8e2TVl1
https://youtu.be/u_MBHfKI3cw?si=jx03nAi5Q8e2TVl1
- Thu Feb 22, 2024 12:13 pm
- Forum: Technical Discussion
- Topic: New F&T 100uf 350v caps: Tip Of The Week
- Replies: 54
- Views: 1933
Re: New F&T 100uf 350v caps: Tip Of The Week
Mark, there is data showing that ceramic caps produce measurable distortion, depending on the dielectric type. In some cases it’s very little, comparable to mica, and in others it’s significant. It just struck me as funny when you said the difference is always exactly as you expect. I perceive that...
- Thu Feb 22, 2024 2:28 am
- Forum: Technical Discussion
- Topic: New F&T 100uf 350v caps: Tip Of The Week
- Replies: 54
- Views: 1933
Re: New F&T 100uf 350v caps: Tip Of The Week
...I do hear a difference between ceramic and silver mica caps and the difference is always the same. I don’t know why they sound different, but they do sound different, the silver mica seems to let more signal through. Confirmation bias, anyone? ;^) Hi Martin, I also respect your opinion and knowl...
- Wed Feb 21, 2024 3:02 am
- Forum: Technical Discussion
- Topic: New F&T 100uf 350v caps: Tip Of The Week
- Replies: 54
- Views: 1933
Re: New F&T 100uf 350v caps: Tip Of The Week
Sigh. Fair enough, I know you have mentioned this sort of thing time and time again. I do have great respect for your work and your opinions, but I do hear a difference between ceramic and silver mica caps and the difference is always the same. I don’t know why they sound different, but they do sou...