Let me see what I did.....ok you are right and the additional funds have been sent via PayPal.
Russellc
Russellc
You will be pleased, I built 3 of the design. Flat out one of my top five listens of any amp, not just DIY.
Hi X,
just ordered two sets of AN PCBs and two SLB single rail PCBs.
It'll be a project for early next year I guess, when current projects will be completed.
Thanks to you, Aksa and JPS64 for your work and support of the DIY community.
Christophe
Hi Christophe,
Thank you! Please note that Alpha Nirvana needs dual rail SLBs.
Hi,
Is there any chance to get some more PCB's. I'm located in Europe.
Thanks
Have you looked at XRK's Etsy site?
Hello, I want to order two boards.
Hi,
Is there any chance to get some more PCBs. I'm located in Europe.
Thanks
See post #147, above.
Since the Alpha Nirvana use the same topology as the Aksa Lender preamp it doesn’t make sense to use that as a preamplifier.
Are you looking for something with volume control or just a preamp core and you add your own volume control?
Jhofland’s Diamond Buffer is a great preamp. I am in process of ordering more RTR modules.
There is a headphone amp version of this with volume control that makes a superb preamp.
There is also a Desktop variant.
Are you looking for something with volume control or just a preamp core and you add your own volume control?
Jhofland’s Diamond Buffer is a great preamp. I am in process of ordering more RTR modules.
There is a headphone amp version of this with volume control that makes a superb preamp.
I’m working with Jhofland to develop a new Class AB version of the Pocket Class A (PCA) headphone amp in an Altoids tin called the Pocket Diamond Buffer (PDB). It will use the Diamond buffer discussed in another thread combined with an OPA1642 for the voltage gain. The buffer will be inside the feedback loop of the opamp for a composite amp. This will be a state of the art headphone amp in a nostalgic DIY package. The power on/off will be controlled by the click on the volume pot (same as PCA) but a MOSFET had to be added to turn on and off the negative rail. Power will be two 9v...
There is also a Desktop variant.
This amazing little amp has been discussed as part of the DB thread but I think it deserves its own thread given how it has quite different objectives from the Pocket Diamond Buffer (PDB) HPA.
This desktop variant uses TO-126 output BJTs with dedicated heatsinks and does not have the separate MOSFET rail switching needed for the pocket one. The setpoints have been optimized for a moderate 40mA nominal bias current that will let you run in full Class A operation for most headphone uses. It will leave Class A around 250mW into 32 ohms. Of course, you can adjust the emitter resistors to...
This desktop variant uses TO-126 output BJTs with dedicated heatsinks and does not have the separate MOSFET rail switching needed for the pocket one. The setpoints have been optimized for a moderate 40mA nominal bias current that will let you run in full Class A operation for most headphone uses. It will leave Class A around 250mW into 32 ohms. Of course, you can adjust the emitter resistors to...
There was recently thread about headphone amplifier, which can offcourse, be used as preamp. Hugh participated in that thread. I built it and liked the sound.
Post in thread 'DIY Class A Headphone Amp suggestion' https://www.diyaudio.com/community/threads/diy-class-a-headphone-amp-suggestion.415623/post-7754502
Post in thread 'DIY Class A Headphone Amp suggestion' https://www.diyaudio.com/community/threads/diy-class-a-headphone-amp-suggestion.415623/post-7754502
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