I didn't mean the input caps. I want to purchase T3e PSU without the caps. My 10000uF 63v caps are 35mm dia. with lead pitch 10mm, will they fit?
cheers,
col.
So I wanted to buy the T2, but want the slightly better STA517Bs. I am guessing they are not a drop-in replacement for the SA505's in the T2 and I should wait for the T4?
I also heard that Tripath chips like a good potentiometer and Alps makes a difference. A Noble pot certainly really improved the sound on my original modded Sonic T-Amp.
It looks like T4 is going to be quite a bit more expensive than T2, just looking at the complexity and the parts. Sigh, I wish I had more money. Supporting your hi-fi audio needs is hard on a student budget 🙂
I also heard that Tripath chips like a good potentiometer and Alps makes a difference. A Noble pot certainly really improved the sound on my original modded Sonic T-Amp.
It looks like T4 is going to be quite a bit more expensive than T2, just looking at the complexity and the parts. Sigh, I wish I had more money. Supporting your hi-fi audio needs is hard on a student budget 🙂
Getting closer... I've got most of the mechanical things sorted. Just cant's get solder time.
The extra board is a V regulator for the 70 mm fan I'm putting in there.
I'm very excited to be very close to finishing this amp. Nice holiday present for myself!
An externally hosted image should be here but it was not working when we last tested it.
The extra board is a V regulator for the 70 mm fan I'm putting in there.
I'm very excited to be very close to finishing this amp. Nice holiday present for myself!
Input selector
My DIY skilz are severely lacking so I plan on using this input selector with my amp - Audio Input Selector Relay Board, With 12V regulator on eBay (end time 12-Dec-10 10:08:26 GMT) Is it fairly good?
I want to use the hifimediy power supply to power it.
My DIY skilz are severely lacking so I plan on using this input selector with my amp - Audio Input Selector Relay Board, With 12V regulator on eBay (end time 12-Dec-10 10:08:26 GMT) Is it fairly good?
I want to use the hifimediy power supply to power it.
Hifimediy, the way your designs are going (e.g., inputs for external boards), a DC power output - like the Sure amps have for daisy-chaining multiple boards together - would be a nice addition. It looks like you might already have a spot reserved for one on the T4, though it's hard to tell from the photo.
Adding a power output might also be a way to avoid the noise issues that surface when multiple boards are connected to the same power supply. It's worth considering, anyway.
I hope we can add a digital input board or module to T4 later, it will connect to T4 by PWM signal and switch the channels.
Hifimediy can i ask you when the T4 will be ready and if you have maybe evaluated the end price for it? Now I have yours T1 and I am very satisfied with it.
Regards Aleš
Regards Aleš
🙂 Is that a actuated/motorized potentiometer and a VFD display header (or maybe an IR and control panel header)?
I wonder how the sound of a sta517B-based amp differs from one with sta510A?
If the higher voltage capacity isn't used, then the sound is essentially the same. If the voltage is raised, you can get stronger peaks plus much less distortion ... These amps sound best at about 60% of maximum power as mandated by rail voltage. Raise the rail voltage and you raise that 60% bar.
Last edited:
Not really. Here's some info: STA517B at same power levels as normal TP2050?
"You will get the same output with the same load and rail voltage. Whatever internal differences, those will be inside the feedback loop so the output will be the same. "
Essentially, the TC2000 and its rail-voltage / gain configuration mandates the THD.
I think a saw V-bro post some number of ten told lower THD with the STA517Bs but when it's already at around 0.0001% THD then moving the decimal don't really have much difference. The real difference is in rail voltage... and sound. For some reason the STA517B seem to sound better (whatever the reason, I haven't found it yet).
I wanted to thank Mr. Y. Yubing (Hifimediy) and Nick Steinar for their enthusiasm, professionalism, and nice products at very fair prices.
I got my T2 and Meanwell S-350-27 within less than a week of ordering.
This evening i wired them up "temporarily" with various bits from my accumulated electronic odds and ends (i suspect temporary may last a few months). The only serious thing I did was to take the input connector out and wire some input wires directly to the board.
Everything works; the heatsink is quite warm running at 30v but I can keep my hand on it; the DC offsets are low as set at the factory and didn't need any adjusting; there is no background noise with 90dB rated speakers; and the sound is well balanced and very detailed. I may not be able to resist putting a tube preamp in front of it just for fun, but it doesn't need it.
I have been accumulating parts for a Nelson Pass F5 amp, which is about as far away from PCM chips and SMPS as you can get and still be playing with solid state audio. (The F5 dissipates about 340 watts constantly in order to get 25 watts of class A power per channel). That's a fun project, too, but it's getting expensive for the two 300va toriods and fancy power supply diodes and huge heatsinks, and so on, so I think it may go on hold for a while.
Now I want a T4. And the modular digital input I just voted for in the previous post. And some nice right-sized chassis... it never ends!
I got my T2 and Meanwell S-350-27 within less than a week of ordering.
This evening i wired them up "temporarily" with various bits from my accumulated electronic odds and ends (i suspect temporary may last a few months). The only serious thing I did was to take the input connector out and wire some input wires directly to the board.
Everything works; the heatsink is quite warm running at 30v but I can keep my hand on it; the DC offsets are low as set at the factory and didn't need any adjusting; there is no background noise with 90dB rated speakers; and the sound is well balanced and very detailed. I may not be able to resist putting a tube preamp in front of it just for fun, but it doesn't need it.
I have been accumulating parts for a Nelson Pass F5 amp, which is about as far away from PCM chips and SMPS as you can get and still be playing with solid state audio. (The F5 dissipates about 340 watts constantly in order to get 25 watts of class A power per channel). That's a fun project, too, but it's getting expensive for the two 300va toriods and fancy power supply diodes and huge heatsinks, and so on, so I think it may go on hold for a while.
Now I want a T4. And the modular digital input I just voted for in the previous post. And some nice right-sized chassis... it never ends!
- Status
- Not open for further replies.