Designing a simple PGA2310 based preamplifier with network control
At the moment I am prototyping a high quality pre-amplifier based around the PGA2310 volume control and an op-amp buffer input with RF filtering. Each channel will be selectable by relay, along with gain adjustment for each channel in terms of increase in dB. Each channel will be assigned a name that can be changed easily in software and stored along...
Tidy up of my honey badger amplifier
Over the past month or two, I've finally fixed up some snags that I had when building the honey badger amplifier. When I first built it, I had a difficult time trying to track down dry joint on one of the start boards - it also had a bad IDC connector delivering power to it. In addition the PSU boards had...
Building DIYAudio's honey badger amplifier
Over a couple of years, I slowly built out an amplifier based on the DIYaudio honeybadger design . It was an on/off process where I got one part of it working at a time. Starting by building the channels one at a time on a bench PSU. This project consists of a single large transformer and dual mono PSU boards with...
Building a pair of Troels Gravesen\"s Jensen ER speakers
A couple of months ago I built a pair of Jensen ER speakers from Troels Gravesen's website linked above. Given my room size I went for the slightly smaller ported design that is 360mm deep. Now both they and I have had chance to break in I'll write a little about them. In my case usage is about 50-50 audio and...
Simple cheap as chips turntable VTA spacer.
What better than a piece of aluminium? Maybe with a very thin gasket underneath to ensure a firm and secure fixing. Cut out a circle big enough for the mounting points, then drill through the middle enough for the arm to go through. Nothing particularly troublesome there. At the moment I've not needed to use this spacer, so it's purely theoretical....
Polyurethane wood glue for audio equipment.
To me it has one very large advantage for audio equipment over PVA; which is that it expands to fill any gaps. So if the two pieces of wood being stuck together have any imperfections that could allow air through the glue will seal it. See the picture below for how the glue expands enough to ooze out of the sides...
Subwoofer build that got me back into DIY
Having built several speaker set-ups and amplifiers when I was younger I had got out of the hobby for quite a number of years. However, this build was back in about 2011 and since then I've built a few much better units. However, this is still kept here for completeness. Why I hold this view? In a small room I think...
Building a pair of Seas Mimir design speakers.
For some time now, I've been running a pair of high quality bookshelf speakers based on the Seas Mimir design. Apparently, they are named after the Nordic god of Wisdom and Knowledge, I cannot disagree and with each listening I like them more and more. I've run them off both Roksan and Arcam amplification and I've really liked the sound...
HI-FI Collective cable kit 6
Some time ago I built interconnect cable kit #6 from HI-FI Collective. It's been in my system now for some time and has been used in quite a few situations. Firstly, it's been used to connect an Arcam rDAC to my Roksan K2, secondly, it's been used to connect my Cambridge Audio 752BD to my Arcam AVR380 and lastly at the...
Orbit, a high performance DIY turntable.
What I really like about Rega decks is that they are very easy to upgrade. In fact there is no need to perform all upgrades in one go, one can start with the TT PSU, then the platter and sub-platter and so on. This means a high performing deck can be purchased slowly in steps. In fact my first attempt at...
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