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RJM Audio, now on Google+

Posted 21st November 2011 at 12:06 PM by rjm (RJM Audio Blog)

I hate facebook but I'm willing to give Google+ a go. Now they have "product" pages as well as "people" pages, I have made a little port to RJM Audio.

RJM Audio Google+ page
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Sapphire Desktop Headphone Amplifier Kit

Posted 8th September 2011 at 05:26 AM by rjm (RJM Audio Blog)
Updated 10th December 2011 at 02:23 PM by rjm (add some photos)

Update: kits were sold, but another run of boards is going ahead!

There will be 10 kits available, at a cost of $100 each. The boards (rev. 14a1) and all parts for the boards will be included. Shipping is included.

Info here and here.
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VSPS Kit

Posted 3rd August 2011 at 12:21 AM by rjm (RJM Audio Blog)

My notes tell me the first VSPS Kit was shipped on July 24th 2009. Two years later, there are just over 15 of the 100 kits left unsold. This was a limited edition, once gone they are gone and at the current rate that will happen before the end of the year.

So if you had it in mind to get one...

ordering page
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Emitter resistors and diamond buffers and distortion

Posted 3rd April 2011 at 03:36 PM by rjm (RJM Audio Blog)

Plenty of helpful advice in response to my question on emitter resistors, here.

And so finally I finish my prototype Sapphire amplifier, pictured below. The case is from Chinese audio outfit hlly, and very good. I bought it on eBay.

The rest of the components are described on my web page.
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Sapphire Headphone Amplifier

Posted 28th March 2011 at 02:15 PM by rjm (RJM Audio Blog)

Since I was effectively blogging my progress with the project as a forum thread anyway, perhaps it would be better to make it a blog rather than a post. I'm open to the idea, but does anyone ever read these blogs?
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