EMS synthi Hi-Fli repair

[JustALittleSolderBoy]

Good work Phil!

Obviously as You want to finish this project before I do, I've changed my mind and layed my vero-project on ice until You finished Yours. Anyway I work on other projects too and as I waited so long, well, it doesn't matter if I wait a little longer.

The original HiFli enclosure is quite large. You want to keep the pcbs as small as possible.

However many may not have the tools for SMD soldering nor a reflow oven (I don't have one, too). But that doesn't mean, that they will not be able to build it with Your boards in the end: the diode ladder is the most easiest part to build. 2 sections with 12 ladders with 10 diodes each are needed. On my vero layout this section comes to 13 rows x 36 holes per section only. So for example a vero-board as a workaround for BOTH sections would be approximately 9 x 10 cm (3.6 x 3.9 inches) in minimum size.

So workaround boards that will fit to Your board exactly are possible.
Keeping the phaser diodes on a seperate pcb is a good compromise therefore.

[PMowdes2]

Now we wait for the slow boat from HK to deliver the boards

[gordo]

Holy crap, this is getting SERIOUS!!!

[alanp]

Now we wait for the slow boat from HK to deliver the boards

I know the pain of which this man speaks.

[PMowdes2]

Verification in progress

[digi2t]

deleted

[Govmnt_Lacky]

Holy Smokes!!!!     

I love how you guys keep pushing the envelope of challenges!!! This beast looks to be killer!

What size enclosure is it spec'd for?

[alanp]

Diode boards are on their way. 



Thanks to Phil for his monk-like work.

They weren't done by pick and place machines?

[digi2t]

deleted

[TFZ]

Suffering builds the character  .

I would propose not to leave those copper areas unconnected, not ideal from a noise standpoint.

[Govmnt_Lacky]

34 ICs...
240 SMD diodes...

Sounds fun!!!

I'm in!!

(Once the project is finalized and proven of course...)

[PMowdes2]

34 ICs...
240 SMD diodes...

Sounds fun!!!

I'm in!!

(Once the project is finalized and proven of course...)

Think we are nearly done Greg.  I soldered the diode boards by hand and posted them to Canada, just waiting for them to arrive.  Dino's got everything else built and the fuzz section and the LFO seem to check out.  We might have a small issue with the bypass switching which seems to be different between the original schematics and the unit we traced but i'm sure Dino can figure that out.  It's been a bitch but the end is in sight.

[PMowdes2]

Done and verified







Quick demo video on our Instagram page  www.instagram.com/deadendfx

[Govmnt_Lacky]

I just peed a little 

Question...

Did you fellas decide to incorporate the LM13X00 series OTAs or did you just stick with the 3080s?

[PMowdes2]

I just peed a little 

Question...

Did you fellas decide to incorporate the LM13X00 series OTAs or did you just stick with the 3080s?

All LM13700 except one 3080