New PassDIY Headphone Amp (now available)

[AndrewT]

Have you got Lfets or Vfets?

That is the only way you could get D & S mixed up on the PCB.

 

[poli]

subscribed

 

[meldano]

I placed a order at pcbway today

Features:
- PSU for each channel
- Single OPA
- Stackable to my Universal PSU*
- Alps or my Muses direct mount

Universal PSU:
- DC / HF Mains Filter
- 2x 15VA Talema
- CRC + Capmultiplier + LT1086 or LM317

 

[meldano]

Here are the very good boards from pcbway.com

 

[6L6]

Been wanting to try this gif - and this is the perfect time.

That PCB looks beautiful!

 

[sangeet2]

Here are the very good boards from pcbway.com

Wow they are fast. Where are they located?

 

[meldano]

Wow they are fast. Where are they located?

Off Topic:
China. Very good quality, good price and fast.
Only problem with customs.

On Topic:
I will assemble a proto over the Christmas days.

Daniel

 

[sangeet2]

They delivered in 8 days??? How much did you pay?

 

[meldano]

They delivered in 8 days??? How much did you pay?

Please send me a PN and use the online calculator from pcbway.com

The PCB are with 2oz copper, silk screen.

Daniel

 

[meldano]

Been wanting to try this gif - and this is the perfect time.

That PCB looks beautiful!

Thanks! I hope the sound is awesome too.

Daniel

 

[wayne]

Better looking boards than I did! It should sound good you may need to trim a little for compensation.

 

[Hikari1]

Are all resistors in the output stage 1/4 watt? I want to use the output stage as a source follower after the ba3 front end. Gonna put it together on perfboard.

 

[EUVL]

Power = V*I = V^2/R = I^2*R.
Not so difficult to calculate yourself.


Patrick

 

[meldano]

Better looking boards than I did!

Thanks

But what I have to trim ?

 

[generg]

May be you have to write a PM to Wayne to get really an answer….

these guys are busy…..

 

[6L6]

Capacitor value in the feedback circuit.

 

[meldano]

Hi,

can you tell us the way to choose the right capacitor value?

In the shematic I read:
"C7,2 optional. Depends on OP Amp used. Sweep of frequency response and stability."

WHAT have I measure and WHERE?

Do you have values for different OPA wich did you implement?


Daniel

 

[jackinnj]

"Whammy" -- you must have been thinking of the movie with Cary Grant and Myrna Loy.

Instead of 1uF polypropylene for C1,C5 you might want to try polyphenylene sulfide 1uF which is available in through-hole in 10mm lead spacing.

 

[merlin2069er]

Is it out yet?

 

[jackinnj]

Plugging some different opamps into the simulator apropos of the stability question.