Its an replica - not just another clone
BOM: (last upload 08/2021)
|v.1.1||added IC11 and D30, D31, D33 to ORDERING|
|v.1.2||added info from christian about cabling|
|v.1.3||added gnd build notes from Christian, fixed an amount value|
|v.1.4||changed electrolytic capacitor in safety psu from 25V to 35V.|
because its standard to have at AC Rectifier a safety range of multiplier 1.5 - 2
(for example an 18VAC is able to give after the rectifier a 28V-29V DC voltage.
|v.1.5||added extra alternative options for 10k trimmers (clap)|
|v.1.6||fixed value in tape section.|
new value R311: 820K (old value was 820R)
|" Amp section "|
fixed C143 voltage 47uF to 50V.
35V is fine too (comment Patrick)
|v.1.7||advisory added for snare drum fix.|
|v.1.8||added info about cabling and errors in TR-909 service docs|
|v.1.9||fixed values in high tom, C95 and C97 were reversed|
new value C95: 100nF
new value C97: 15nF
(just swap both capacitors, old value was C95 15nF & C97 was 100nF)
Snare Drum section -
please download v.1.7 build documentation for details.
Service advisory: after building the snare you must place a jumper as shown in the pic below, this is shown without parts placed for clarify
bigger picture from me - easier to find the place..
|17.Dec.2020||1.9 build guide|
|2||C95/c97 Tom section||swap both against each other||17 Dec. 2020||1.9 buid guide|
if you‘re using the Safety PSU do not connect pin 27 and pin 28 on the F3 cable, otherwise you‘ll create a ground loop.
|17.dec. 2020||1.9 build guide|
PSU - wrong routing
→ affects the memory
change the 5.6V zener as shown here: