GB for DC coupled B1 buffer with shunt PSUs

[regiregi22]

Ok, so maybe is better to add a trafo for the B1.

I am searching for an headphone amp pcb/kit now. I need the B1 feed my active desktop speakers and a solution fo my high impedence headphone too...

Look for the easy (but high quality) CMoy circuit. Only a double opamp OPA2134, a few resistors and a few capacitors. You can fit it easily in a square inch board.
You can find instructions here:
How to Build the CMoy Pocket Amplifier

Even, with some better care, you can use more expensive opamps like OPA627 (single opamp) or AD8610-AD8620 (single opamp and double opamp). But don't forget to carefully bypass their legs.

 

[regiregi22]

I forgot to say that you could use until +/-15v for the opamp. Just put a regulator before, to put down the +35v to +30v from the main amplifier.

Have a nice building!

 

[Peppe]

HD650 is arriving. I also got a DT770 250 Ohm and a chance to try the DT880 600 Ohm.

The case showed is one of this:

modushop.biz

There is enough room that I can try also other "bigger" project... maybe...

The only DIY experience on headphone amp was this:

HeadWize - Project: The Zen Headphone Amplifier by Marcello Pellerano

And... yes.. we are quite OT 😱 Sorry 😛

 

[regiregi22]

Fit a PPA or a M^3 if you have the guts 😀

 

[Peppe]

I did not know the PPA... On the M^3 I think I have to study a bit 😉

BTW thanks for the advices. 🙂

 

[crt]

Hurayyyyyyy!

I GOT a DIYaudio Bag.
Thanks Tea-Bag for the Gift 🙂

Regards
La Ode

 

[Tea-Bag]

No - small gift for helping with the boards.
Salas and you deserve all the glory. 😀😀

 

[Tea-Bag]

Okay, it has been a month since I first started shipping boards.
So, anyone who has not received theirs, please let me know.

I will hold selling any more boards until I can supply the people who have paid with their boards. Last time I believe there were one or two missing packages, a few mispacked one's etc. I want to clear that all up before selling the remainder of the boards.

I still have a healthy supply of hypnotize boards, but want to make sure that if there is outstanding orders not received that they get first dibs.

PM if you have not gotten your boards, and we will see what we can do!

 

[Peppe]

Please, let me know if a couple of hynotize boards will remain for selling. 😉

 

[JamesBrennan4]

I would be interested in a couple of mesmerize boards when they become available.

 

[Tea-Bag]

Guys, I am holding more buying till probably the end of this week in case anyone else reports lost boards.

There are only 9 Mesmerizes left, but JB4, you can claim first dibs. I still have over 25 hypnotize boards.

 

[presbel]

Is your mesmerize board is still available? I am interested for two boards. If ok please email me the total cost including the one that I place at the spreadsheet so I can send payment thru paypal.

Thanks.

Rey

 

[analogdiy]

I am interested in getting 2 mesmerize boards if you still have them. PM sent.

 

[Tea-Bag]

To those without paypal payment, the Mesmerizes are gone.
There are still <20 Hypnotize boards left.
analogdiy, JamesBrennan4 and Peppe boards ship today.

 

[Tea-Bag]

I am limiting hypnotize sales to two boards max. There are about 10 boards left.
And I thought these would last until summer. 🙂

 

[regiregi22]

You better start thinking in a 3rd round 😱 😀

 

[Tea-Bag]

I have been.
The GB exists with the approval of Salas and CRT.
I've asked Salas what he wants to do next. They can choose to distribute directly if they like.

Either way, give it some time and allow demand to grow for the DCB1 boards again.

 

[analogdiy]

Got my boards. Thank you very much for the fast shipment.

 

[tassosk]

Hi Tea-Bag,
Boards and resistors arrived today (shipping date Mar 6) in perfect condition.
Thank you very much for your efforts.

 

[Tea-Bag]

I was a tad worried with all the news (we get) in your area that the post-office might be on the fritz. Hope all is well over there.