TTSH rev3 buidling guide

open tasks:

• LED-man  add a trusted builder list
• give trusted builders write permissions here
  

BOM: (Bill of material)

the shared mouser basket from thehumancomparator is wrong (22.Dec.2016)
(this Mouser basket was provided in the ordering eMail)
https://www.mouser.de/ProjectManager/ProjectDetail.aspx?AccessID=234c0 9ed60

delete from this mouser basket both parts:
652-SRN6028-101M
710-744290321
this chokes/filters aren´t needed in rev.3 

printabel BOM as list, (rev.2 plus additional list for filter and psu)

ttshv2BOM.pdf (mainboard pcb)

4027v2BOM.pdf (vco boards)

TTSHrev3_SecondFilter_BOM.pdf (filter board)

known issues:

1. Powersupply Board - turn the 2pol MTA156 header if needed - otherwise the power input cable is above the powersupply.    confirmed
   
2. Main board – Missing trace from V- to header. (copyright of picture for thehumancomparator.net )
   
3. 4072 VCF missing trace pin 4 on LM1458 to -14V
4. 4012 VCF Board — BC558 should be installed backwards

buildguide:

This guide is for users with experience in SDIY, you need a scope and a frequency counter, DMM/DVM/LCR-Meter)

i dont share infos about polarity of capacitors, this basics skills are required, otherwise feel free to ask me for a assembly service. (check the trusted builder list)

please use a fume extractor.

its needed to solder 6 SMT caps in 0805 format and 2 SMT power regulators.

this guide is a best practice guide, i´m not responsible for failures/malfunctions/defects.

1. lets start with the powersupply board - add all needed parts on the pcb, start with the two SMT power regulators.
   there is one missing part (a dual choke) - please use wire links here or resistor legs
   turn the 2 pol MTA header as described in the picture
   if needed - wash the pcb carfully on the solderside
   testing/trimming: use a 18-24V DC powersupply for input and set the output to 15V/-15V by usage of the both trimmers
   
   
   
   
2.  Mainboard PCB - place all IC-Sockets ( tin one ic socket from top, place the ic socket and heat the ic socket pin - the socket drop in place
   best practise - begin with the "most use values" and end with the value range Mainboard PCB - start with 100K resistors, 10K, 1K, 1M, 100R (reverb), 10R (Amp) 10M (top right)
   if done - 47k, 4k7, 470K, 4M7, –   22K, 220K, 220R, 2M2, 33K, 3M3, 330K... — 30K1, 680R, 68K, 68K1, 680K...  ..... and all other
   please remember: on solderside are few resistors too - on VCO 4027 boards and filter boards too - its your choice to leave it for later or assembly it yet too (i prefer later)
3. Mainboard PCB - place all rectifiers 1N4148
4. solder from top all parts
5. cut the resistor and rectifier legs from bottom side
6. place all MLCC caps and solder from top
7. place all polyester/polypropylen caps - bend the legs from top
8. add all transistors in place and solder one pin from top -(except the 2N3954, both 2N3958 - if you cant test this, use a milled IC-socket and cut the pins out - use this as socket)
9. turn the pcb and solder all pins. (no switches, no fader, no jacks, no pot, no trimmers)
10. you find on solderside few resistors
11. wash the pcb 2-3 times if needed, i use Ispopropylen alcohole
    - make a break yet - the pcb needs time to dry
12. if you dont need a break - assembly the filterboards and 3 VCO 4027 boards - wash them too, make sure you use flat 10uF electrolyt capacitors, use c0g, polypropylen or silvamica for the 680pF cap,  dont mount the connectionsheaders yet
13. Mainboard pcb: its time to add all other parts on the pcb -  i prefer multiturn trimmers for the VCO V/oct trimmers  20K or 25K, but remember this can´t mounted on the frontpanel pcb side due to sizing, you have to open your TTSH for trimming the VCO
    begin with