Messages

Yeah. The headers are soldered in. But there are no components hidden on the board below. All the pots, faders and switches are on the other side of that board.

I can take as many pics as you want

Holy shit, I'd love to trace this.  I have a set of documents which might be helpful, they include the schematics but the quality is too poor to make sense of for a reliable read.

I think sonic posted that schematic. It's kinda hard to read in parts.

Maybe we can figure something out. My friend is not in desperate need to get it back as soon as possible. All the faders are broken so I need to figure how to replace them. But they work sliding empty with a screw driver.

The fuzz and octave down parts work and sound pretty great.

Kinda weird with the foot pedal. It's not like an expression pedal. You can program to turn effects on or off in the up and down positions.

http://jbemond.free.fr/SDIY/EMS/EMS_Hifli.pdf

Circuit notes and schematic if you want to poke around. Scan quality sucks, unfortunately, but its something to work from.

More discussion: https://www.diystompboxes.com/smfforum/index.php?topic=94294.0
And more still: https://www.diystompboxes.com/smfforum/index.php?topic=73726.0

thanks.  that'll be helpfull.  over 200 diodes in the phaser part of the pedal!

According to slacker from diystompboxes
"The phaser is the same basic design as things like the Phase 45 and Phase 90, but instead of using JFets as voltage controlled resistors it used the string of diodes instead.
The way the diodes act as a voltage controlled resistor is something like this, each diode drops about 0.6 volts across it and this is near enough constant for different currents. Mr Ohm tells us V = IR so if V is constant then as I increases R must decrease, so the resistance of the string of diodes is inversely proportional to the current through it, so by varying the current you vary the resistance.
This is used in a number of synth designs, like the Steiner Synthacon filter, the classic Moog filter does essentially the same thing but with transistors instead of diodes. In diystompbox land Tim Escobedo's Quick and Dirty VCFs use the same trick."

Be very, very careful:

https://reverb.com/ca/item/1567718-original-ems-synthi-hi-fli-analog-guitar-synth-effects-ultra-rare-exc-vtg-cond

There is no "cannot fix it" at that price point. 

Holy sh*t

Sure, I'll share when the project is complete. I'll say it's 70% complete. I want to do several designs (at least two approaches) on this. One is baseline copy and second is control improvement out of it.

Plan to sell the board as well. Now gotta think a sexy name!

Like 911, Lord Agile, Post Master, etc

Ever thought of adding a switch to the board to have their normal algorithm plus 2 more of your choice or 7 more if using a rotary?  Or is there other differences you are talking about than just the algorithms like in the analog part of the circuit?

I imagine getting the reverb part of the circuit correct is the hard part.  Good reverbs use a lot of the memory on the fv1 plus a delay on top of that.  Looking forward to see what you come up with

Are those all diodes there on the left? 

yes. all 1n4148s

also 9 ca3080.  lots of compressors to be made if in the end this thing is not fixable

My friend just got his hands on one of these and it works but sounds pretty bad.  Asked me to take a look at it to see if I could get it working better.  Thought you guys might enjoy the pics of how big this beast is.  To learn more about the product.  http://www.gilmourish.com/?page_id=77.  Apparently designed by a guy who designed a lot of electro harmonix pedals.  I have no idea where to start.  I'm guessing recapping the whole thing

My hand on it is a reference for how big it is



Look at all those diodes

Awesome. Do you mind sharing the patch you made?

Cool. I just started playing around with spincad a few weeks ago. I think I'm gonna start a thread for spincad where people can offer tips examples etc on how to get started 

Is there a way to read the eeprom? Or are you planning to program it yourself ?

I just redownloaded the zip file.  The hex file works fine for me but if I put the bank file into spincad and export it as a hex the starfield file doesn't work.

It is a pedalpcb board with 8 patches.  I tried moving the patch to other numbers in spincad and spinasm

I juste started platine round with spincad designer and trying to wrap my head around it. I've downloaded as many shares files as possible to try and learn how it works by nodding other people work. I downloaded the headtrip zip (thanks for sharing brian!). Anyway. I can get the two other patches to work but the starfield patch has no sound output. I've also tried saving it to asm and using spinasm it passes with no errors. Same problem using the supplied hex file.  Am I the only person with this problem? Or does the file have a problem? I am using this on a pedalpcb board.

Thanks in advance

I built a pedal for a friend based on the $5 preamp that Frederik from parasites studio posted. Can't find it at this moment. The parts cost more than $5 though. The 1na217 in the preamp costs about 5 bucks and the drv123 which converts from unbalanced to balanced also costs about 5 bucks.

Anyway. I took the output from the preamp and sent it to a bluesbreaker. Into send return Jack's. Then into a belton based reverb. After that so many people liked them I've built 5 for other people.

Works really good and is silent. Also added a dry out but most people have wanted one so that the sound guy has no control over their effects. So they just use xlr in and out.

Thanks, I'll check it out!

I'll find the link to the vero that he posted but am not at home right now. And add a pic of one of the builds I did.

Edit. Found the vero here. http://guitar-fx-layouts.42897.x6.nabble.com/Microphone-preamp-vero-layout-td5181.html took the send after c4 and return was where that part of c4 was.

Also used a vero layout to do +/- 15v for the preamp/ balanced to unbalanced. And used 2 dpdt relays for the xlr switching on and off.

Looking crappy/diy as i/they like it

I built a pedal for a friend based on the $5 preamp that Frederik from parasites studio posted. Can't find it at this moment. The parts cost more than $5 though. The 1na217 in the preamp costs about 5 bucks and the drv123 which converts from unbalanced to balanced also costs about 5 bucks.

Anyway. I took the output from the preamp and sent it to a bluesbreaker. Into send return Jack's. Then into a belton based reverb. After that so many people liked them I've built 5 for other people.

Works really good and is silent. Also added a dry out but most people have wanted one so that the sound guy has no control over their effects. So they just use xlr in and out.