First One - mosFET amplifier module

[irribeo]

Each smps has a fuse 12A slowblow on input already, so with 4A fuse for two combined you don't have to worry about those 12A fuses 🙂

 

[Lazy Cat]

One among many good things around in this thread is that people who rarely exercise electronics are now facing with almost unimaginable things for them, ever experienced before. That's superb, so let's do more science. 😎

🖥

 

[fluid]

4A for two supplies combined is still very low, I would buy some higher value fuses as well 8A or 10A otherwise you will have the fuses tripping when the amp provides more than 2A each. Those supplies can easily give 10A each and more.

 

[Parap]

8A fuse did the trick, relais clicked and everything measures good. Next step is connecting the amp boards 🙂

 

[maxlorenz]

One among many good things around in this thread is that people who rarely exercise electronics are now facing with almost unimaginable things for them, ever experienced before. That's superb, so let's do more science. 😎

🖥

Ah! Good Techno music from the early 80's, if I recall well, when I was 15 or so... 😀

Thank you for that one.
M.

 

[Bassivus]

One among many good things around in this thread is that people who rarely exercise electronics are now facing with almost unimaginable things for them, ever experienced before. That's superb, so let's do more science. 😎

🖥

Thomas Dolby - She Blinded Me With Science

 

[J.M.K]

Fried module ! 🙁

I'm not very proud of this .........
But completely my fault !
Short on the output, with a non isolated RCA connector

JMK

 

[Lazy Cat]

No regrets here, we're all learning from our mistakes, some hidden, some more obvious like the one on second picture. Luckily by using the First One module all these repairable in no time. 😎

As seen from fractured and burnt mosfet, quite large energy burst happened. 💥

 

[Mark Verhoeven]

Hi Guys,

I have just finished my new First One 1.4M build with SMPS600 from Cresnet and some capacitor boards that I got very cheap from Taobao.

Fluid,

I am interested in buying those capacitor boards, but I realy don't know how to communicate as I only can find a Chinese website. Can you help me out?

Mark.

 

[fluid]

Fluid,

I am interested in buying those capacitor boards, but I realy don't know how to communicate as I only can find a Chinese website. Can you help me out?

Mark.

Yes, buying anything from Taobao can be a bit difficult.

This is the place where I bought the boards from.

https://world.taobao.com/item/520440386529.htm?fromSite=main&spm=a312a.7700846.0.0.BR8ynq&_u=e2o2hn3cca58

I recommend using Google Chrome as a browser as it it will translate the page for you into a language you can understand. Google is bad at translating Chinese but it will give you something you can understand.

Sometimes you can find the same items on aliexpress for a higher price but buying them is easier as the postage is usually included.

I managed to find the same board on aliexpress for you
https://www.aliexpress.com/item/The-empty-plate-The-high-power-amplifier-rectifier-power-supply-board-single-bridge-PCB-25mm-capacitor/32639815226.html?spm=2114.30010308.3.10.hN68od&ws_ab_test=searchweb0_0,searchweb201602_2,searchweb201603_1&btsid=136b3501-5a42-4196-93b0-ea2a733bcf36

I found it by copying the english translated description of the board and searching that on aliexpress or google.

The other alternative for most countries is using a taobao agent who will buy the item for you and then send it to you for a fee. Shipping for one off items is expensive though.

For once living in Australia has made it easier to buy things as Taobao will act as an agent and ship to Australia. Although the language barrier still makes it a challenge!

Hope that helps

 

[fluid]

Some more info, they do come in different configurations and sizes depending on what capacitors you want to use

https://www.aliexpress.com/af/Empty-plate.-Power-amplifier-single-bridge-rectifi.html?ltype=wholesale&d=y&origin=n&isViewCP=y&catId=0&initiative_id=SB_20161113170741&SearchText=Empty+plate.+Power+amplifier+single+bridge+rectifi&blanktest=0

25mm snap in caps will fit the board I have but 30mm is too big.
There is also pads for 5mm pin spacing bypass caps.

 

[Eric06]

Hi Mark,
You may also check for "High-power Single Bridge 25A Rectifier Filter Power Supply Board For Amplifier" on ebay.

 

[hose4]

Analog dac with fo1.4m

As i am waiting for my own unit i borrowed an msb analog dac.
As a complete system it was really not bad, not bad at all.
After some adjustments and playing with different cables, a wow moment.
Maybe I cured my upgradeitis, but probably just went dormant.

Happy times,

 

[Lazy Cat]

Analog DAC, best one I've had in my system, not counting audition of MSB Select DAC or showroom's shots

 

[Mark Verhoeven]

Andrej,

I am trying to get all the parts needed to build a new amp. Can you please tell me which connectors are needed for connecting the DC sense modules to the Hypex SMPS and the connectors needed for input to FO 1.4?

Thanks,

Mark.

 

[Mark Verhoeven]

I received the FO and DC sense modules today and found out already. 😉

 

[Mark Verhoeven]

Andrej,

I've seen in the schematic for the FO 1.4 the grounding layout has been revised compared to the schematic for the FO 1.2. Does this apply to the 1.2 version too, or should it only be used for the 1.4?

Mark.

 

[Lazy Cat]

Mark, use grounding layout for v1.4 😉

 

[Mark Verhoeven]

Of course I will grounding layout meant for v1.4 with my new modules. I would like to know what is the prefered layout for the v1.2 modules.

 

[Lazy Cat]

I couldn't be more clear, in respect of logic.