Search found 2954 matches

by Mark
Wed Mar 27, 2024 11:33 am
Forum: Technical Discussion
Topic: Knight 600 valve emissions tester thoughts?
Replies: 5
Views: 119

Re: Knight 600 valve emissions tester thoughts?

Stevem wrote: Wed Mar 27, 2024 9:53 am Give me your mailing address and I will send you a few!😊
:lol:

I’m sure they will eventuate.
by Mark
Wed Mar 27, 2024 9:14 am
Forum: Technical Discussion
Topic: Knight 600 valve emissions tester thoughts?
Replies: 5
Views: 119

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.
by Mark
Mon Mar 25, 2024 11:45 am
Forum: Trainwreck Discussion
Topic: Where to find Trainwreck Logos?
Replies: 37
Views: 5216

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...
by Mark
Mon Mar 25, 2024 1:38 am
Forum: Technical Discussion
Topic: Knight 600 valve emissions tester thoughts?
Replies: 5
Views: 119

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....
by Mark
Mon Mar 25, 2024 1:33 am
Forum: Trainwreck Discussion
Topic: Where to find Trainwreck Logos?
Replies: 37
Views: 5216

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.....
by Mark
Sun Mar 24, 2024 7:03 am
Forum: Trainwreck Discussion
Topic: Where to find Trainwreck Logos?
Replies: 37
Views: 5216

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...
by Mark
Mon Mar 18, 2024 9:18 am
Forum: Trainwreck Discussion
Topic: Where to find Trainwreck Logos?
Replies: 37
Views: 5216

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 ...
by Mark
Mon Mar 18, 2024 9:07 am
Forum: Trainwreck Discussion
Topic: Where to find Trainwreck Logos?
Replies: 37
Views: 5216

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 ...
by Mark
Tue Mar 12, 2024 2:40 am
Forum: Trainwreck Discussion
Topic: Trainwreck Champ ? (Dirty Little Monster)
Replies: 8
Views: 496

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
by Mark
Thu Feb 22, 2024 12:13 pm
Forum: Technical Discussion
Topic: New F&T 100uf 350v caps: Tip Of The Week
Replies: 54
Views: 1586

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...
by Mark
Thu Feb 22, 2024 2:28 am
Forum: Technical Discussion
Topic: New F&T 100uf 350v caps: Tip Of The Week
Replies: 54
Views: 1586

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...
by Mark
Wed Feb 21, 2024 3:02 am
Forum: Technical Discussion
Topic: New F&T 100uf 350v caps: Tip Of The Week
Replies: 54
Views: 1586

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...
by Mark
Mon Feb 19, 2024 11:35 pm
Forum: Technical Discussion
Topic: New F&T 100uf 350v caps: Tip Of The Week
Replies: 54
Views: 1586

Re: New F&T 100uf 350v caps: Tip Of The Week

I like measurements. They help me quantify what I experience. I wish I had that spectrum analyzer R.G. had, that function of my Rigol scope is limited. I agree anything real can be measured. Maybe not with the gear and process available to all of us, but it can help identify and filter out the vari...
by Mark
Sat Feb 17, 2024 12:52 pm
Forum: Technical Discussion
Topic: New F&T 100uf 350v caps: Tip Of The Week
Replies: 54
Views: 1586

Re: New F&T 100uf 350v caps: Tip Of The Week

Damned double post. The reply went through but the screen didn’t change.
by Mark
Sat Feb 17, 2024 12:51 pm
Forum: Technical Discussion
Topic: New F&T 100uf 350v caps: Tip Of The Week
Replies: 54
Views: 1586

Re: New F&T 100uf 350v caps: Tip Of The Week

Well, I don’t doubt it’s hard to quantify what is going on with the components. I have yet to find someone prove to me that different resistors sound different. I’m not saying it’s not possible, I haven’t heard it. I have heard the difference between silver mica and ceramic caps and it’s quite disti...