Hakuin SE Class A HP Amp

[xrk971]

The first prototype boards had issues with the battery fuel gauge system. The amp itself worked well and so did the charging and DCDC step up boost converter.

The second Gen is still under development. Only schematics and layout at this point.

However, if you want to hear what a Hakuin sounds like, you can get the Yarra format daughtebosrds and the breakout board that allows you to connect input / output and the power supply.

Those can be found here:

Hakuin DB for Yarra | Etsy

M2x/yarra Format Breakout Test Board | Etsy

This is sort of one of those pet projects that JPS64 and I work on in our spare time. It may or may not happen. It needs a little more interest from folks and we will motivate to get it happening sooner than later.

 

[yourownbuzz]

Nice! sounds like things are picking up again

 

[xrk971]

Some more progress…

 

[pure5152]

Hey XRK! I recently revived my DIYA account just to post here, but given it's been over half a year since the last progress updates were posted here, are there any new updates on the Hakuin? I love my PCA (it's the "strongman" altoids tin from funch), and this Hakuin seems like a lovely improvement in performance over it. Any updates would be greatly appreciated, and if you ever decide to make finished units for sale I would love one and would love to help contribute to a group buy of some kind.

 

[xrk971]

Unfortunately, no more progress. Too many other projects going on…

 

[Onemangang]

Hi
I wonder if this ciruit ( the amp itself ) would fair well as a lineamp?
I love the simplicity of it, and hope someone could maybe comment on this.

Thanks for all the good work

 

[xrk971]

Yes it works great as a line level amp. You can get it as an amp module for the Yarra.

https://www.etsy.com/listing/773172...2360&click_sum=503fa667&ref=shop_home_recs_23

Use it with either the Yarra or the small breakout board and provide your own Dc PSU.

https://www.etsy.com/listing/103315...1079&click_sum=17e8c746&ref=shop_home_recs_41

It one of many different line stage modules you can try out.

https://www.diyaudio.com/community/...lifier-hpa-for-melbourne-db-group-buy.334457/

The Yarra is a wonderful “Endgame” preamp with superb low noise and very capable psu. But quite a complicated and involved project.

The breakout test board lets you get going quickly and cheaply with your own setup.

 

[Kokanee]

Hi X,

I am busy running through the "Yarra PreAmp/HPA" thread as I will be building up a preamp using the 70065K 22V Talema transformers.

I have one "Yarra Pre Amp" pcb left, and am planning to make a dedicated HPA with the Hakuin daughter boards.

I am assuming that the 70063K Talema 25VA/15V transformer would suffice here?

Thanks,
MM

 

[xrk971]

Yes, the 15v trafo is perfect for the Hakuin preamp/headphone amp as the circa 29v from the 22v is too high.

 

[Kokanee]

Thanks X,

Quick question: Can the resistors be 0.5W rather than 0.6W in the Hakuin DB ?
I have a wack of 0.5W and would be nice to use them up.

Thanks for the help,
MM

 

[xrk971]

Yes, that should be ok.