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RJM Audio in 2017 [modular simplicity]

Posted 19th December 2016 at 01:11 AM by rjm
Updated 28th December 2016 at 12:50 AM by rjm

The time of year where I like to draw up some plans for the next 12 months.

This year’s output looked something as follows,

At the end of all this I find myself sitting on four different voltage regulator circuits, several variants of the transistor output diamond buffer, five phono stages variants, and a couple of nebulous ideas about developing a discrete voltage gain amplifier.

I'm considering how to package this all up in such a way as to best appeal to diyaudio builders of widely varying application needs and skill levels while keeping a simple and logically consistent product lineup.

The basic units I'm looking at are,

[voltage regulator] [voltage gain stage] [small buffer / line driver] [medium buffer / headphone driver]

On one hand I could make separate boards for everything. On the other hand I could have modular layouts as electronic files and copy-paste common configurations together as single boards for manufacture.

I'm not a huge fan of mix-and-match to be honest. It just confuses people and leads to excessive clutter.

So with that in mind I will work on the following,
  1. A line buffer solution (no regulators) [currently the bboard 2.1f and likely to stay as that revision, so mark this one done already]
  2. A unity gain preamplifier (buffer with built in regulator) [a revised version of the old bboard 1.1a boards]
  3. One or two voltage regulator boards. Probably the basic Z-reg, as a companion to the X-reg board I already have.[these are now done]
  4. A fully discrete headphone amplifier / preamplifier (with/without voltage regulators built in, we’ll see) [design in progress]
  5. (A unity gain headphone buffer) [low priority as I don’t see a huge demand for this, most likely offered as a mod to 2.]
  6. A transistor power amplifier. [unlikely to see more than low level development in 2017, but if 3. is successful I would be looking at scaling it up as a 5-10 W mini amp to drive desktop speakers as the next logical step.]
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