Marsh headphone amp from Linear Audio

[e_fortier]

My old laptop power supply from eBay, where did you get this?
Maybe I’ll try a linear supply, I’ll see.

 

[jackinnj]

I’d like to know the current requirements is it +/- 15Vdc at 150mA per channel or less ?
Ideally I’d like to use a 19Vdc laptop supply, is there a well known (not noisy) way to get from +19Vdc to dual polarity +/-15Vdc supply?

Thanks
Eric

Jan made individual articles available for sale. https://www.linearaudio.net/

For a +/-15VDC supply search DK for a DC-DC converter, 2 outputs, 7 watts, Murata or Meanwell. The converter, if necessary, can outboard LM317/337 to remove a lot of switching transients. Make sure to put a choke on the input to the DC-DC converter. Marsh HPA will run well on +/- 12VDC

 

[mhenschel]

@jackinnj -- Could I buy a kit delivered to Markham, Canada with an international money order?

 

[EUVL]

Jan made individual articles available for sale. https://www.linearaudio.net/

That is no longer the case.
The paper copies at Amazon are also printed to order, as far as I know.

The entire volume is available in a USB stick.
https://diyaudiostore.com/collections/books/products/the-complete-linear-audio-library

Over the years, he made a loss at the end, after all the effort.
Only doing this for love. My deepest respect.


Patrick

 

[e_fortier]

I actually sent 2.9 Euro as mentioned on the website to Jan and the same day I received the Marsh HA article in PDF format.

 

[e_fortier]

Jan made individual articles available for sale. https://www.linearaudio.net/

For a +/-15VDC supply search DK for a DC-DC converter, 2 outputs, 7 watts, Murata or Meanwell. The converter, if necessary, can outboard LM317/337 to remove a lot of switching transients. Make sure to put a choke on the input to the DC-DC converter. Marsh HPA will run well on +/- 12VDC

Thanks for the valuable info Jack

 

[EUVL]

I actually sent 2.9 Euro as mentioned on the website to Jan and the same day I received the Marsh HA article in PDF format.

What service.
Won't buy him a coffee at a Bistro.


How we miss him here,
Patrick

 

[jackinnj]

I will start sending out kits or PCB's on Thursday. It's been incredibly busy with our real business these past few weeks. I have a few PM's already, let me know if you are interested.

You might get 1N914 in stead of 1N4148s

 

[EUVL]

Jack,

Please check PM.

Thanks,
Patrick