Analog Ian Forum

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Analogian Forum

Hi all! After much brainstorming we have decided to add our own Analogian Forum which will cover our mainstream audience, the analogue electronics industry which includes music, consumer and professional audio, funky effects, stomp pedals, recorders, lighting and stage, etc. But not to lose out on bits and bytes we include digital – home based PC, laptop, Arduino, Raspberry Pi, Intel’s Edison and TI’s Beaglebone plus of course many others making their way into the DIY market.

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Welcome and Introduction

Hi and a Big Welcome to all new users to the Analogian Forum. Please say a few words here about yourself before submitting any posts. Although we are all part of the global village and welcome all users this website is after all based in South Africa with all the advantages of great weather, not so great droughts, braaivleis, Klippies, rugby and sonskyn. Share your thoughts, visions and projects. Thank you and have a great day. Uwe na siku njema, Jabulela usuku lwakho, Ubenosuku olumnandi kakhulu.

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Projects
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DIY Audio amplification – power amplifiers

We stick to audio power amplification on this forum. There are separate forums for Chip Amplifiers and pre-amplification, mixers consumer and professional.

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DIY – Gain Clone and Chip Amplifiers

A forum dedicated to DIY chip amplifiers, the LM3875, LM3886, LM4780 including the TDA9293 and TDA7294, etc

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DIY Audio Amplification – preamplifiers and mixers

Microvolts, millivolts and general low voltage amplification, including tone controls, equalisation, signal and impedance matching. Power amplification is not covered here, please see forum list.

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DIY – Elektor Q-Watt

High powered amplifier inspired by Elektor’s Q-Watt and forum for those expanding on results, performance and their own builds. Interesting subject because of the power transistors MG6330-R / MG9410-R and National Semiconductor / TI LME49811 which is used in the input stage, with the ability to drive a 500W 8 Ohm output stage. Sadly the LME49811 is now end of life without any equivalent. As a side-note for those that have built these amplifiers let us know of any workaround you took if you could not get the chip but you had the boards.

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DIY – DACs – Digital to analogue converters

Many DIYer circles are having great fun building their own multi-layered boards with high spec DACs. Many of these circuits are for professional usage and cost a lot less than over the counter.

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DIY – Effects – Synthesisers and pedals

South Africa with it’s “boer maak ‘n plan” mentality” has scores of DIYer and professionals reverse engineering products to suite their needs. Many musicians have made their mark because of their unique sound. Analalog and digital electronics is changing our world of music.

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DIY – DMX and analogue controlled lighting

What is sound and stage without lighting. This avenue has just opened with the cheap DMX controller. Strangely enough internet searches show very little with regard to the mechatronics used. Nice platform to boast about your achievements.

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DIY – Radio tubes, pre and output stages

Radio tubes were phased out in the 60s weren’t they? As a matter of fact, not! Many guitarists prefer the tube sound. Along with the return and popularity of vinyl many enthusiasts are opting for the tube sound. Are they really better or just pie in the sky?

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DIY – Limiters and Compressors

The audio DIY community is obsessed with this subject. Of course we have the nay-sayers but the reality is if used in capable hands they are worth their weight in gold. Here you can add your semiconductor or tube project.

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DIY – Printed Circuit Boards

Some tips and tricks, equipment, process and end product. Look under Manufacturers, Distributors and Resellers as well to get companies that specialise in this. Sometimes it is cheaper for mass production.

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DIY – Loudspeaker Enclosures

Whether for professional use or your home there’s a lot of information out there which can always come in use. An oft asked question is making a loudspeaker enclosure of non standard width or depth. Another is getting the Bose 901 design.

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DIY – Guitar Amplifiers

Thanks to Bothead’s request we have added a guitar amplifier enthusiasts forum here. Bothead, I pray that you add some input 🙂 For the rest, South Africa has some pretty decent local music, actually world class. We know that there’s a whole bunch of people building and fixing guitar amplifiers. This is for you.

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Technical – Q & A
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Audio power amplification – Class A

A hands on category topic for those experienced in power hungry amplification – the Class A act of all amplifiers.

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Audio power amplification – Class AB

Crossover distortion and non linear operation are in a day’s work when it comes to the gruelling task of overcoming many of this amplifier class’s distinguishable features. Our most probable first project in audio is going to be a class AB amplifier and what sounds better than our first amplifier, right?

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Audio power amplification – Class D

Class D amplification is nothing new. What is new are the multitude of chips available on the market at very affordable pricing with incredible power outputs with very little cooling. Manage your project here to give us insight as to what is being built and how.

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Preamplification and Mixers

Low voltage amplification and mixing. What more can be said? Building your own mixer may seem like climbing Kilimanjaro but it’s all in the head!

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Limiters and Compressors

All the gen to keep you up to date! Limiters and compressors have been around since the beginning of mankind but not enough is understood about them. Listen to modern music and you will hear compression at work. Love them or hate them they are here to stay.

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Turntables, tone arms, belts and stylus

After a few laps in the garden pond why not listen to Vivaldi to while away your Sunday afternoon. Except your turntable has rumble and a buzz. What to do, what to do?

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Cassette tape decks and recorders

The cassette tape has not gone, neither has it been forgotten. Recently a survey proved that cassette players have gone up in price.

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Open Reel tape recorders or R2R

In a recent article on latest recording trends we were awe struck by the outcome. R2R is indeed the best reproducer of music of all time, beating an expensive turntable at it as well. Top level recording equipment is a must for the studio and the home. R2Rs are just quicker and better at it – at a price of course. Ask your questions here.

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Synth and Effects

A very popular topic – both analogue and digital effects panels are very much in demand. Although VST has made things cheaper and easier stand alone units are still very popular.

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Kits
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Kits – Electronics / electrical

Where to find electronic kits on the South African market. We’ll kick off with a few suppliers. Please help us here.

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Kits – Hardware

Project builders always have one thought in mind: The end product. Is it for home use or resale? We have all at some stage or other found that the hardware aspect is seriously lacking – great 2U chassis for rack mount is either crazily expensive or only available on eBay. Where to go? Let’s get some solutions together.

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Schematic Diagrams
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Professional audio

Professional audio schematics – power amplification, mixers, synth, effects, recorders and compressors/limiters

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Consumer audio and HT

Consumer electronics for audio, home theatre, turntables, R2R, cassette players and recorders, optical devices and radio tuners.

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Lighting

Becoming a popular subject but little is seen from a schematics point of view. Once out of warranty you may need to replace hardware, flash firmware or just get the software. More often than not a triac can fuse leaving lights on or there is false triggering without wiring problems. What to do and how to do it – you’ll always need to resort to a schematic of sorts.

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Vintage and Tubes

Now becoming very popular, tube equipment has a vast following. Fortunately lots of schematics are still available. Point to point wiring also makes for easier fault-finding but not always.

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Manufacturers, Distributors and Resellers
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Audio equipment

Need to buy a Crown amplifier, contact Phase Linear or need advice from Music Group (Behringer)? Pop a question here.

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Lighting

Stage and audio is part of our daily lives. Stage lighting is not for the faint hearted. When working with stage lighting never forget that often the final connect has to be done by a registered electrician. Laws and by-laws vary from country to country, region to region. When running into problems or needing qualified assistance often the manufacturer or distributor is the best contact point.

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Printed Circuit Boards

Where to get a company that specialises in production. Mass production works out invariably cheaper than doing it at home unless you have the right equipment.

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Equipment, Tools and Machinery

Soldering station faulty? Need a rework station? Pop a question here.

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Loudspeaker Enclosures

Sometimes to have a professionally made enclosure(s) for loudspeakers is the best option. And your wife’s sanity.

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Audio Editing Software and DAW
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Audio Editors

From free and simple to powerful commercial releases. What do you use and why?

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Digital Audio Workstations

DAWs are intimidating pieces of software but are a must have when adding effects, virtual instruments (VST) for multi-channel and final stage mixing. Reaper is my personal favourite and does not cost the earth. Which ones do you use and why?

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Arduino, Pi, Beagle Bone and Edison
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Stage Lighting

Your own DMX and non-proprietary light control for home or stage use.

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Fluorescent Displays

Fancy hacks and mods made to enhance your projects.

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Sensing – Light and Audio

Miscellaneous forum for DIY experimenters – using microcontrol for switching inputs, outputs, protection and building on the functionality of last year’s technology.

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