The tubes in the D-2000 MUST be of the correct types, because their heaters are connected in
a certain series-parallel arrangement. DO NOT MIX OR EXPERIMENT WITH THE WRONG TUBE
TYPES. Do not do stupid things, or you will DAMAGE the D-2000 and we will be angry at you.
The types are, from left to right:
Tube 1 - 6CB6/6CF6 (must be same type as tube 2)
Tube 2 - 6CB6/6CF6 (must be same type as tube 1)
Tube 3 - 5U8, 5CQ8 or 5GH8 (must be same as tubes 4 and 5)
Tube 4 - 5U8, 5CQ8 or 5GH8 (must be same as tubes 3 and 5)
Tube 5 - 5U8, 5CQ8 or 5GH8 (must be same as tubes 3 and 4)
Tube 6 – 3AU6 (do NOT use a 6AU6 here!)
Tubes 1 and 2 can be type 6AK5 or 6AU6, or similar pentodes with 6.3v heaters. But they must
both be the same type. DO NOT MIX TYPES. Tube swapping or “tube rolling” is NOT
RECOMMENDED.
The D-2000 use a low-voltage "polyfuse" self-resetting fuse. It is soldered to the PC board, and
should not need replacement. If the polyfuse opens repeatedly, you are probably feeding the
D-2000 an excessive DC power voltage, or you are stupidly using the wrong tubes or trying to
feed it AC power.
Use ONLY the AC-
to-D
C adapters we recommend to power the D-2000.
DO NOT EXPERIMENT!!
Technical specs
Audio outputs: 1000 ohm unbalanced, suitable to drive 600-ohm inputs, maximum level +20dBm.
CV inputs: maximum range -5v to +10v DC. The CVs for the five drum voices will respond only to
positive control voltages. The “Output Mute CV” input will mute the output completely with a -5v CV,
and open fully with a +10v CV. Usable sweep depends on settings of Tune controls. CV Level and
Tune controls for each pitched voice interact with each other. All controls may interact with unrelated
controls slightly. Individual audio outputs for each drum voice may not be fully isolated from the other
voices. CV and trigger pulses are not fully isolated from the outputs. There may be hum, noise and
crosstalk on all inputs and outputs --
get used to it
. It's vacuum tubes, and tubes are
evil and unruly
little bastards.
It's an extremely primitive drumbox, and if you don't like that, we can only say:
why did you buy the
damned thing?
And then we will say,
send it back immediately
, we have plenty of other customers
who want one. Then you are welcome to return to your first love: eating your mother's pussy.
(text is copyright 2010 Metasonix. All rights reserved. It is a violation of federal law to reproduce, reuse or duplicate this
publication without the express written permission of Metasonix or its assigned representative.)
(Oh, you want to FIX it? You say you want a SCHEMATIC?? Oh, that's PRICELESS. Contact us at METASONIX. 495 N.
Main #109, Lakeport CA 95453, (707) 263-5343,
synth@metasonix.com
or metasonix@gmail.com. We'll arrange for
repair, while refusing to give you a schematic. The circuit of this bastard thing is so INSANE, we didn't write it down
anyway.)
