Why the Hell do these builders still use point-to-point when ALL the major tube amp makers went to tagboards or turret boards 60 years ago?
You want to work on this?
Or this?
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L Cochrane push pull 6l6 amplifier debug.
- Thread starter trainbuftony
- Start date
You want to work on this?
Or this?
Pretty sure I have a cardboard box that I've been throwing random pulled parts in that looks similar.
I won't give anyone crap about recycled chassis or messy builds. Pretty much everything I own fits at least one of those bills, but it does mostly work correctly within it's limitations. Also if we're being honest about it, some factory-built amps are pretty damn messy under the hood. Ever see the inner workings of a Pilot SA-260? It works, but it ain't pretty. I can absolutely appreciate a nice tidy amp with textbook ideal design parameters but I'm more than willing to accept something that looks a mess but performs well.
maxhifi
Addicted Member
Why the Hell do these builders still use point-to-point when ALL the major tube makers went to tagboards or turret boards 50 years ago?
You want to work on this?
View attachment 3140222
Or this?
Point to point has lower capacitance between adjacent leads.. that's why all the old TV sets used it instead of turrets. Function over form, er, yeah that's it.
There's a line however that divides messy but designed, and sort of stream of consciousness abstract construction, which follows an idea but not a design.
Hmm...
They're worried about minor capacitance issues --- and not all the EMF coupling of point-to-point?
maxhifi
Addicted Member
There's point to point which is laid out by an engineer, then there's building a circuit with a minimum of education or skill. These may look the same from two feet, but look closer and they're not.
trainbuftony
Electron Herder
This does neither.
It's a mess, and it doesn't work.
This is "high end" sure there's cleaner execution out there, but this is definitely 100% a high end amp. Meaning it was built in an attempt to sell it to the "high end" of the market. That's all "high end" means.
Doesn't mean high performance, doesn't mean high power. It means going after the big money spenders regardless of what you're selling. The "high end" of the market.
It's a mess, and it doesn't work.
This is "high end" sure there's cleaner execution out there, but this is definitely 100% a high end amp. Meaning it was built in an attempt to sell it to the "high end" of the market. That's all "high end" means.
Doesn't mean high performance, doesn't mean high power. It means going after the big money spenders regardless of what you're selling. The "high end" of the market.
DesertRatt
All Bark, No Bite!
Looks to me like s new art form is being created--Electro-Naivety. I've been seeing DIY Tube amps since 1970s and never seen anything like the assemblages shown in this thread.
I like it when designers of anything have the tech or mechanic in mind. Not, "Let's just throw this thing together and the heck with maintenance."
DesertRatt
All Bark, No Bite!
Both amps (in the pictures) seem to have 4 times as many parts as would be needed. Maybe that's the art of all this--jamming as much and as many goodies as possible under the hood?
Then, the amp should have windows on the build so you can see all the parts.
Computers are like that, these days.
Lavane
Lunatic Member
Ya, that picture reminds me of this schematic drawing.
Attachments
Lavane
Lunatic Member
Ya, I've built a few. Lights fans, inside case lighting with a big window on the side. One even had a color light organ connected to the sound card output.Then, the amp should have windows on the build so you can see all the parts.
View attachment 3140237
Computers are like that, these days.
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My keyboard does that LED color wave thing. The funny thing is I never look at my keyboard (especially while playing games).Ya, I've built a few. Light3s fans, inside case lighting with a big window on the side. One even had a color light organ connected to the sound card output.
So only my family members comment on it.
Lavane
Lunatic Member
Those are nice. I like the lighted keyboards. Great when gaining at night with the headphones on.
What does one of these sell for? Did someone mention that?
Lavane
Lunatic Member
Or overly complicated.
trainbuftony
Electron Herder
I drew out a quick schematic as wired. It looks like one of those self inverting output stages. Which is a known, low fidelity cheap console design that never sounded good. Why someone would go to the effort to completely gut an amplifier only to build a design which can't possibly sound good, it's curious.
Each layer of this onion i peel back, confirms my Initial suspicion. Anyway, I don't need to ramble on and on. Let the schematic speak for itself.
Each layer of this onion i peel back, confirms my Initial suspicion. Anyway, I don't need to ramble on and on. Let the schematic speak for itself.