lotus

Helios thread
« Reply #200 on: September 29, 2007, 07:26:36 PM »
Just wondering if you've had a chance to further test your helios? Also are you still running it at +24?


CJ

Helios thread
« Reply #201 on: October 01, 2007, 01:41:33 PM »
rotheu, i am working on those inductors right now, gettting them to work without resonance in the audio band, piece of cake, literally...
Or did I mean pie....yes..make that pie.
Apple pie. With a thin crust, topped with maple syrup and ice cream.
4 twenty kind o treat.
If I can't fix it, I can fix it so nobody else can!
Frank's Tube Page: www.mif.pg.gda.pl/homepages/frank/vs.html
Guitar Amps: http://bmamps.com/Tech_sch.html

khstudio

Helios thread
« Reply #202 on: October 01, 2007, 02:37:08 PM »
I just want to thank everyone for their efforts on this :thumb:

I'm definitely in on this one if you guys can get it going :green:

This also might sound dumb... but the only reference I have to even coming close to hearing a HELIOS is the UAD EQ plugin. It is by far my favorite EQ plug for several things. I know it's not "real" but if it even resembles how the originals works then... :green:

The shape of the mids, the low shelf/ bump & the high shelf are ALL KILLER :!:
Kevin ~ KHStudio

rotheu

Helios thread
« Reply #203 on: February 28, 2008, 12:22:38 AM »
Quote
rotheu, i am working on those inductors right now, getting them to work without resonance in the audio band, piece of cake, literally...
Or did I mean pie....yes..make that pie.
Apple pie. With a thin crust, topped with maple syrup and ice cream.
4 twenty kind o treat.


Hi CJ. I didn't visit the forum for long  time, just saw your post. Did you get anywhere trying to get them to work? What's the idea behind it? Thanks a lot.

rotheu

Whoops

Re: Helios thread
« Reply #204 on: October 16, 2011, 11:05:17 PM »
A long time went by now,
But how did your projects go?

Any more results since the prototyping stage?

Does anyone still have the schematics?
all the links are dead now and I would really love to study this project and prototype a unit.

Thanks
« Last Edit: October 14, 2012, 10:22:09 PM by Whoops »

Whoops

Re: Helios thread
« Reply #205 on: October 14, 2012, 10:22:22 PM »
Bump

CJ

Re: Helios thread
« Reply #206 on: October 18, 2012, 05:56:46 AM »
i might have the inductor specs laying around,

If I can't fix it, I can fix it so nobody else can!
Frank's Tube Page: www.mif.pg.gda.pl/homepages/frank/vs.html
Guitar Amps: http://bmamps.com/Tech_sch.html

bruno2000

Re: Helios thread
« Reply #207 on: October 18, 2012, 09:06:34 AM »
I'm interested in the info as well.  Thanks!
Best,
Bruno2000

Whoops

Re: Helios thread
« Reply #208 on: October 21, 2012, 05:24:01 PM »
i might have the inductor specs laying around,

That would be really cool, thanks

Whoops

Re: Helios thread
« Reply #209 on: October 21, 2012, 05:25:52 PM »
The links for the schematics in the first page of this thread are all dead now unfortunately

Does anyone still have the Helios modules schematics?

Thanks


ruffrecords

Re: Helios thread
« Reply #210 on: October 22, 2012, 06:46:26 AM »
There are a few still online here for example:

http://www.danalexanderaudio.com/recorder.html

Cheers

Ian
www.customtubeconsoles.com
https://mark3vtm.blogspot.co.uk/
www.eztubemixer.blogspot.co.uk


'The only people not making mistakes are the people doing nothing'

bruno2000

Re: Helios thread
« Reply #211 on: October 22, 2012, 01:45:42 PM »
There are a few still online here for example:

http://www.danalexanderaudio.com/recorder.html

Cheers

Ian

Thanks!
Best,
Bruno2000

Whoops

Re: Helios thread
« Reply #212 on: October 22, 2012, 02:54:32 PM »
There are a few still online here for example:

http://www.danalexanderaudio.com/recorder.html

Cheers

Ian

Thanks Ian,
But it seems that the input module schematic for the Mic Pre is not correct. Or at least it's not the most common version of the Helios 69 Mic Pre

kpearsall

Re: Helios thread
« Reply #213 on: October 22, 2012, 07:03:22 PM »

Would this help?  ;D

I've never seen this anywhere else before. I found it listed in the photos of a channel strip in an Ebay auction. If anyone has a problem with me posting this let me know I'll take it down.

This is the best one I've ever seen though. Enjoy :)

Whoops

Re: Helios thread
« Reply #214 on: October 22, 2012, 09:17:39 PM »

Would this help?  ;D

I've never seen this anywhere else before. I found it listed in the photos of a channel strip in an Ebay auction. If anyone has a problem with me posting this let me know I'll take it down.

This is the best one I've ever seen though. Enjoy :)

Thanks really good actually,
it's clean and it has the schematics for the full module.
Thanks

I think that the circuit probably differs between different schematics, the transistor arrangement at least seems different.

kpearsall

Re: Helios thread
« Reply #215 on: October 22, 2012, 09:46:31 PM »
If anyone's curious, that was from the musikladen console. Made my day when I found it and it had the HPF section with line amp in there :)

Re: Helios thread
« Reply #216 on: December 29, 2012, 09:36:02 PM »
If anyone's curious, that was from the musikladen console. Made my day when I found it and it had the HPF section with line amp in there :)

Yes it is.  There are actually three different versions of that schematic.  The main difference is which amp cards are being used, and also the extra filter switch.
I don't care how many tapes I must bake, Analog is still the best!

gemini86

Re: Helios thread
« Reply #217 on: December 30, 2012, 04:57:32 AM »
There was a -24V version of the line amp (15C1) and then later, a +24V version (2128)

If you look at these two moduels, the schematic is the same, although note that the 2128 schematic is incorrect, as the PNP and NPN transistors should be swapped (it should read 2n4058, then 2n3707, 2n3707).

- Rodney

"...you better call Kenny Loggins, 'cause you're in the danger zone."

Re: Helios thread
« Reply #218 on: March 18, 2013, 03:47:42 PM »
Hey guys I just got in a 500 series helios type 69 module. Anyone who is interested in working on a project based on this, pm me.

Brian Roth

Re: Helios thread
« Reply #219 on: February 01, 2014, 01:14:43 AM »
I've read through this thread several times, trying to determine the values of the inductors.  From the schematics, there are two different midrange versions, one with a single tap, and another with two taps.  I gleaned a bit of info, but have a few questions.

I did see what were apparently the values for the two tap version:  19.7 mH/37 mH/345 mH.  Can anyone verify that, and does anyone know the DC resistances?

I couldn't find any info regarding the midrange inductor with just a single tap.

The LF inductor is apparently 10H, but I never saw any DC resistance info.

Or maybe I just got lost in the thread   LOL!

Thanks.

Bri

Brian Roth Technical Services
Salina Kansas, home of the best vinyl on the planet!

http://www.BrianRoth.com
recordingservicesandsupply.com/
www.qualityrecordpressings.com/
store.acousticsounds.com


 

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