Feeler: ez760 - Compressor/Limiter/Expander/Gate

[Gustav]

I haven't tried sourcing yet, but I've been following this thread with interest,
cause I want to build a pair when time and money let me...

From what I understand most of the transistors in the BOM are discontinued.
Gustav who makes the board posted a bunch of substitutes in this thread,
but there were one in particular he couldn't find a sub for.
Can't remember which one ( one page back)
So if you don't mind, I'm interested in what transistors you used.

Thanks
Magnus

I built a unit and found replacements for everything I couldn't pick up locally, but...

I moved in december, and the unit was left with a friend in Copenhagen. I haven't been back since, and he keeps postponing shipment/bringing it over (he just got a new girlfriend ). Unit was assembled, but needed the edge connectors and a power up to verify functionality.

In any case, I have since found the various originals. Ill pack up a few "transistor kits" and put them on the site in a few weeks...

Gustav

 

[Dr Gris]

That's great Gustav!

Hmmm.... maybe I should pay a visit to your friend since I'm living across the pond in Malmö,
if he has a new girlfriend he wont have time for a 760 

Cheers
Magnus

 

[MatthisD]

There you go magnus and I have a couple of 2n3820 if you need a pair. Thanks for the boards Gustav, the unit I posted was the extra PCB from your 3 for 2 deal.
Matt

 

[MountCyanide]

I just want to chime in here and let you guys know that every single one of the obsolete transistors are available in droves on ebay.

 

[MountCyanide]

Anybody have a Front panel express file for this?
I haven't gotten the whole accurate scales and holes thing down yet.

 

[jicama]

I've finally put the lid on this single channel; DIY input transformer, none on the output, PSU board bolted to where the output transformer should be, power switch at the rear, sidechain insert TRS wired in to the compressor section, knob caps to follow the original's knob colours.

Did you use the meter from hairballaudio???

 

[MatthisD]

I did yes.

 

[jicama]

I did yes.

How come you don't put the audio transformers?

 

[MatthisD]

How come you don't put the audio transformers?

An output transformer you mean? I don't happen to have a suitable transformer, I might add one at a later stage.

 

[jicama]

How come you don't put the audio transformers?

An output transformer you mean? I don't happen to have a suitable transformer, I might add one at a later stage.

Potenciometers seems´s diferent from usual, with 5 pins, did you get them from AML?
Cheers

 

[Gustav]

Almost done stuffing two channels, and ready to start putting it together.

But hey - whats an "LC Network 100pF"?

Gustav

 

[Slenderchap]

But hey - whats an "LC Network 100pF"?

It is an EMC filter:
http://www.rapidonline.com/Electronic-Components/100pf-100v-T-network-Capacitor-26-6182

You don't really need to use them.... you can just put a wire link across the 2 outer pins and leave the centre pin unconnected....

Colin
www.audiomaintenance.com

 

[Gustav]

But hey - whats an "LC Network 100pF"?

It is an EMC filter:
http://www.rapidonline.com/Electronic-Components/100pf-100v-T-network-Capacitor-26-6182

You don't really need to use them.... you can just put a wire link across the 2 outer pins and leave the centre pin unconnected....

Colin
www.audiomaintenance.com

Thanks, Colin. Figured LC denoted inductor/capacitor, so I thought it was something more esoteric (expensive). If I don't absolutely need them, I will try without just to avoid the hassle.

Gustav

 

[Gustav]

An update on this.

Waiting for proper standoffs and a few other bits to finish up.

Gustav

 

[ruairioflaherty]

Looks great Gustav, would love to hear one of these in action...

 

[salomonander]

Here's another BOM that imports into the mouser bom import tool located here:

http://www.mouser.com/bom/bom.aspx

Just make sure that all the parts are really what you want to order. I have not ordered this yet and will probably go through it a little more. It's in a nice easy import format though so you can edit it for your own purposes as needed and maybe save a little time. Some required parts may be missing or incorrect so please double-check before you order and let me know and I might be able to modify and re-upload.

NON-MOUSER parts are also listed in this file (Taken directly from Colin's BOM in the colourbook.pdf) so don't import those.

Total price comes up to about $235 from mouser. This is minus meter, transformers, case, etc...

Best,
jonathan

no luck importing this to mouser. can anyone assist me?

 

[salomonander]

ps: is there really just the BOM in the colourbook? no manufacturer part numbers? this is terrible.... at farnell one has to order at least 5 units of every cap. total waste of money. so i now have to go to farnell just to find out the manufacturers number and get that at mouser. worst bom i ever came across. sorry.

 

[Gustav]

this is terrible....

Pretend the shop references aren't there, and use the full list of parts and values.

A resistor is a resistor...

Gustav

 

[salomonander]

this is terrible....

Pretend the shop references aren't there, and use the full list of parts and values.

A resistor is a resistor...

Gustav

yes you are right. still .... a manufacturers number would be a little nicer. ill try to export a mouser bom once its done.

 

[Gustav]

worst bom i ever came across. sorry.

Even after your edit, I am still a little puzzled about your level of annoyance with this particular BOM.

It contains a very detailed list of parts and values needed for the project, and even if some of the stock-references for Rapid are outdated, Colin has made one of the most detailed and informative BOMs I have ever come across. No, its not as convenient drag-and-drop Mouser cart, but "terrible" and "worst BOM ever" really puzzles me...

Gustav