Online Parts International


Where to get vintage gear spares? Over the last 6 months I have received quite a few mails from desperate individuals wishing to restore their old radios, tube and semiconductor, integrated amplifiers, turntables and tape decks. Belts and power supplies and many semiconductors have equivalents but we get stuck with Germanium, decals, knobs and switches with most […]



Kraftwerk, Styx and My Vocoder – Shaping human voices Generating and shaping audio and RF wave patterns has long been an interest for many and is seen in the medical, military and commercial industries. Not wanting to re-invent the wheel but rather looking at another spin, what is the appeal? Although there are many makes and models, […]

Korg M1 - By Deepsonic, CC BY 2.0, https://commons.wikimedia.org/w/index.php?curid=66234414


Best selling synthesisers of all time Just in case you may have the MicroKorg don’t be too surprised to know that it may just be one of the best selling synthesisers of all time.  Without having the data from any manufacturer readers may not be entirely convinced but considering that they have been manufactured since 2002 reflects […]



Gibson Brands Inc files for Chapter 11 The iconic USA manufacturer of guitars , electronic audio and DJ equipment has filed for bankruptcy protection caused by losses of nearly $500m through Gibson Innovation, their consumer and DJ division. Gibson Brands Inc filed for Chapter 11 according to news reports, allowing noteholders to continue the business and replace […]



Volume Units and Decibels My first peek at a Nakamichi was in Japan.  Sparse in detail, no flashing lights, VU meters or fluorescent displays.  Just so damned gorgeous. OK, then you have the PA-7, industrial strength, industrial looks and what a beauty. But if you one needs to really capture beautiful looking amplifiers, then look no further […]

Doepfer Dark Energy II


The ADSR Plot ADSR is not unique to music synthesis, we have it in limiting and compression circuits, VOX (voice operated switching) and a multitude of electronic circuits where the human controller or sound engineer needs to modify or reshape original waveforms.   The graph below shows the application control sequence.

Fluke 117 - R7000 to R8000 in South Africa


In the beginning Steve, Steve, Bill and Paul had an idea…. Part I of the basics to electronic engineering… for the student Many years ago most schoolboys had this desire to build something great to make them famous. It may have been a steam train, a car or an aeroplane.  Girls didn’t talk about this because it […]

boss ds-1 simple block


The Rhythm Composers Although I am not big on rhythm composers and generators the articles covering electronic music synthesis would be totally irrelevant without at least a few lines on the TR-808 and a few other “drum machines” which come from the analogue era of the 60s to 80s and dare I say, even today. Ikutaro Kakehash founded […]

eti4600 - voltage controlled synth


Electronics:  Kits and Synths Minimoog VCF A word of thanks to Paul in Cape Town for this great link:  Minimoog VCF – interesting that one can bounce around the internet and miss some gems. The patent 3475623 Voltage controlled filters, although covered only on a surface level is daunting at design level but is an area in […]



South African Music – our musicians, not really but nearly! Manfred Mann, rather then Manfred Sepse Lubowitz, was born in South Africa in 1940.  I would hasten to add that we all like to see him as a South African,  like Elon Musc, but truth be told much is driven by influences within the musician’s host country. […]

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