BPA300 mono block

[tryonziess]

Sprocket, i gave alex88 9.00 apiece for the boards. you can have them for that. Four boards @9.00 =36 + 3.00 for shipping to alabama. Total 40.

 

[tryonziess]

Alexc88, I have decided to run the boards in parallel for a while. How would you set the 2 gain resistors up. Also, to run from single ended input. Could i just change the 10k to 5 or 7,5. This would increase gain. However, input inpedance is still high is it not for single ended input. thanks. Units are working fine.

 

[alexw88]

The input impedance per PCB is 10k / 3, = 3.3k. I won't lower the 10k. If you need more gain, you can change the 200k to 300k instead.

 

[SprockeT1597]

Hi, tryonziess,

Sounds great!Can you email me, so we can sort out the details?

cheers,
Scott

 

[dt2676]

I am interested in 6 pcbs. Thanks.

 

[alexcd]

I have 4 that I have populated and don't need. PM me or email at alexcd@gmail.com

 

[Pocoyo]

Hii Alex

Do you still have those PCB ?

 

[alexw88]

Jeffry, have you finished your amp?

Currently I don't have any more PCBs. I don't plan to make more at the moment. However anyone who is interested can use my gerber files to make the PCBs.

 

[si_jopie0382]

Hii Alex

Jeffry and I was finished build your amp 😀

BUT

We not finish yet build our casing
Maybe another week we know the sound quality

Jeffry want to order more because our friend
want to build too

 

[Algar_emi]

I found some bigger speaker terminal, bigger rating.

 

[alexw88]

This looks like a good fit 🙂

 

[si_jopie0382]

My BPA300

Hi All,

I try to share some pics of my BPA300. 🙂

Cheers

Jopie

 

[si_jopie0382]

PSU unit

my PSU using elna for audio because i get it just for $4/pcs from local dealer and IR 35A 400V Diode Bridge.

 

[si_jopie0382]

BPA300 Back side

Back side of my BPA300

 

[si_jopie0382]

I wanna say thank you to :

- Alexw88 for support and make this happen
- My friend Jeffry who give me to know about audio DIY and for all support.
- My friend Bonie Bong who teach me all everything i want to know about electonic and help me to build this.

For main capacitor i've got a very good price for a "GIANT Capacitor" Mundorf Supreme 15uf, it's almost a half price compare to part connexion.

for the next few day i will post some other pics

cheers
Jopie

 

[Algar_emi]

I found the perfect fit screw terminals for the power and speaker connectors of the BPA150 PCB at a surplus store. A member already asked me to provide him these connectors. I'm selling them at my cost to help others members. If there is any other members interested, I'll probably return to the store in two weeks. Any persons interested by these connectors, just let me know by email, I'll by you a kit. Check my previous post for an idea on how look the connectors, black Bakelite type insulator, very tough and high current rating. The connector pins fit the PCB large mounting holes.

The speaker connector (2 screws) is 0.50U$
The power (+/-30V, 3 screws) is 1.00U$, you need two per board.
I will add on top of that our sale taxes that I will pay at the counter and 3% PayPal fee.
Sorry I accept only PayPal for convenience.

You will pay only the actual shipping cost, usually 5-8$ air mail worldwide.

It may help other members, I had a hard time to find the correct connectors. 🙄

Since I'm doing this for free, I won't buy 100 connectors just in case or return to the store just for fun every week. Please guys let me know within the next two weeks 🙂

Have fun...

 

[Algar_emi]

Still one week to go, anyone else interested? Bye...

 

[Pocoyo]

Looks cool algar

maybe better you offering your drv 134 algar
😀 😀 😀

looks cool

 

[eaferrer]

I need 4 boards, can i pay by western union?

 

[si_jopie0382]

Hi Alexw88,

You've done a great work!

after several hour....... my BPA300 produce better and better sound...

I'm strongly recommanded for anyone who want to build power amps using LM3886... you should try BPA300

Cheers
Jopie