TTSH Building documentation

Here starts my own Building Documentation /Steps and Modification.

STATUS completely finished

last Modification Date: 26 May 2014

Dokumentation: http://thehumancomparator.net/building/

pdf. Dokumentiton and calibration guide (at the end) : http://www.guyd2.com/ttsh-buildpocket.pdf (doublecheck the PSU/Polarization issue)

Schematic: TTSH-schematics.pdf (also avaiable on zthees webserver)

ATTENTION

wiring from PSU to the module headers are wrong "silkreen error" +/- must crossed - doublecheck before power up modules,

check other ISSUES here

Please read this Buildings tips and known Issues site to save time and money

Dont solder switches, Pushbutton, faders and jacks prior finally assembly - the orientation is only correct by placing all jacks/faders together with the Frontpanel.

The pcb bends if you solder all fader and jacks, use 7 longs spacers by soldering job..

Result from Widy/DSL-man:

BOM Failure - parts not listed

----------------------------------------

1x BC558b S&H missing ( need 9 .. BOM say 8)
1x 150K S&H missing ( not in building doc)
1x100p (missing part )

parts left DSL-man/widy

------------------

1x 47K

2x 100N

Tip

check the pcb for failures !

Starts soldering the VCO Boards:

Online building documentation failure:

for VCO pcbs in zthees building website shows 1x61k9 but needed on each pcb 2x 61k9 resistors

http://thehumancomparator.net/4027-2/

Start assembly Main PCB

Use standoffs/Spacers:

Mounting VCO-1 pcb with long headers, but solder before 150K & 3m3

( i use only long headers instead of zthees preferred headers)

PSU with DC-DC Voltage "regulator"

right picture shows the X-crossed ferrite bead to fix the -15/+15V silkscreen error,

cross one Ferrite on top pcb side - the ferrite on other pcb site (not shown here)

VCO testing - wiring a +15v cable to resistor and probe ..

see my solution..

further: dont solder the needed jack complete - solder only a bit, because the frontpanel don´t fit with this position 100%

VCF picture - handle with care - 2n3904/06 - BC558 doublecheck the position near Tempco

further please read carefull zthees building guide for VCF - there is a issue with matched pair 2N3906 - silkscreen error etc.

AR/ADSR

VCA

for testing: test with probe a VCO (need +15V cable see VCO testing above)

feed the VCO signal to the VCA and check the waveform with a oscilloscope.

Ringmod, Preamp, Envelope Follower

Mixer

Don´t solder the parts complete - maybe the frontpanel dont match with this position..

Noise, Voltage Processor

Warning

with the 2n5172 the noise is distorted and have a very high gain..

tested Resolution:

leave out the 2n5172 - use a bc337, - bend right leg to top, solder a 10K resistor in series to the 10uF cap.

not shown here yet

first Panel mounting test

S/H - Clock - Noise

Warning

Due to some issues from the clock LED driver - we bridge the 2n5172.

see here: http://thehumancomparator.net/modifications/

All Parts soldered, Panel mounted, need to solder the jacks.

Building tip:

Building Tip

place each row of faders on PCB and solder 2 pins, place the Panel in right way and mount all screws,-- solder the Faders complete.

remove the panel and plug all jacks in position, place the panel - mount all screws and few jacks with screws - turn the device, solder the jacks.

solder the LED at last.

Use on all sides spacers, for a faster panel un/mounting use spacers (with plastic/silicon washers) instead of screws and you can turn the panel on table without breaking some faders.

If you have trouble with noise leds, connect the 470r resistor near amp/noise to the unlabeled solder hole.

HUM Issue:

by using of both amplifiers for integrated speakers i had massiv hum, by touching the panel the hum sound changes. (hum is only in speakers not in main out)

a workarround from zthee, was tested by me - it helps.

Resolution:

short out the 10Ω resistor and the 100p capacitor in the PSU section. E.g. just make a small bridge between the pad close to 10Ω and 100p as in the attached picture.

use RG174 cables or shielded microphone cable for offboard wiring.