TTSH Building documentation

Here starts my own Building Documentation /Steps and Modification.

Please read the Buildings tips to save time

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

The board and pcb bends if you solder all fader and jacks without a case, put the panel on spacers or in a case.

(see at bottom for more infos)

Result from Widy/DSL-man:

first TTSH Kit arrived on 05.03.2014

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)

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

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

addional Info: 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:

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.

finished:

Planned Case: