[sdiy] TR-909 undersized DC blocking caps

Richie Burnett rburnett at richieburnett.co.uk
Fri Feb 18 22:34:26 CET 2011


Stewart Pye wrote:

> Actually most channels (including the kick drum) have 1k in series with 
> 12k which makes it 13k. This should result in a -3dB point of 12.2Hz.

There's effectively ten of those 13k 'ish resistors is parallel though to 
mix the 10 seperate instrument outputs together.  That is 1.3k combined with 
1uF to give 122 Hz.  The high-pass (or "bass cut") effect is still very 
noticeable.

-Richie, 




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