Oops. I bought another dr-55..
Yes I know. Itchy trigger finger on the Buy-it-now button.. This one is a bit scruffy, rusty battery cover, and from the description it looks […]
Projects
Boss DR-55 capacitor change to allow use of TC4011B chips..
From a thread on electro-music forum: “The CD4011 is a bit fussy … a few years ago I repaired one of these machines with a […]
Hohner EK 2: All sounds now working. Just about..
I spent an hour tinkering tonight..I now have all sounds working: piano, harpsichord, electric piano, bass, brass, and.. tada.. strings. Piano was a wobbly connector, […]
Hohner EK2 – First Look
I almost called it a synthesizer.. but really, it’s not. But it IS analog (“analogue” – in English) and it has a “Strings” section. In […]
Introducing my new Hohner International EK2 Synthesizer project..
I just bought a Hohner EK 2 synthesiser!This will be my main project after I finish the Korg Delta. I am pretty excited by this, […]
EDC SR-99 Project – TC5514 memory chip replacement.
I finally got around to replacing the memory chip. I bought two from vintage planet on dbay.co.uk (Hi Senso!), which arrived very quickly. Unfortunately so […]
EDC SR-99 Project – Introduction
This may or may not be the SR-99 I replaced the battery clip on in an earlier project. There’s a video associated with that: http://www.synteknik.com/samples/edc-sr99.3gp […]
Boss Dr-55 memory chip replacement. (TC5501P)
This turned out to be remarkably easy! Step 1: de-solder the existing memory chip. This turned out to be an NEC equivalent of the Toshiba […]
Boss DR-55 memory chip replacement. TC5501P
I have now successfully replaced the memory chip with a new Toshiba TC5501P. I’ve installed it in a socket and it all works. Result! Full […]
Battery Clips & Testing | Defective tc5501p ?
I have replaced the battery clip with one that doesn’t have the pp3 clip on it, to save space. I unsoldered the old one, and […]