Gold

sontec 1 RU build thread
« Reply #40 on: August 28, 2008, 03:58:10 PM »
I got the OKW knobs today. They seem like they are of high quality and comparable to Elma.

I wish the pointer on the pointer ring was a little longer. They also don't offer a collet knob in gray with a line for a 1/4" shaft but you can get a cap with a line in gray. Close enough.


therecordingart

sontec 1 RU build thread
« Reply #41 on: August 28, 2008, 04:37:30 PM »
Has anyone tried building this with rotary switches?

khstudio

sontec 1 RU build thread
« Reply #42 on: August 28, 2008, 11:23:25 PM »
Quote from: "Gold"
I got the OKW knobs today. They seem like they are of high quality and comparable to Elma.

I wish the pointer on the pointer ring was a little longer. They also don't offer a collet knob in gray with a line for a 1/4" shaft but you can get a cap with a line in gray. Close enough.


I'm about to order from them too... looks like good stuff. :green:

What were the shaft sizes you got?
I ask because you mentioned 1/4 in & I thought the larger ones were 6mm.

Thanks,
Kevin
Kevin ~ KHStudio

Gold

sontec 1 RU build thread
« Reply #43 on: August 28, 2008, 11:29:57 PM »
The knobs I ordered aren't for this project. I haven't started on this yet. I ordered for 1/4" shafts. Most knob diameters come in 4mm, 6mm, 1/8" and 1/4". Some sizes have more limited options. 6mm always has all the options.

I haven't received my pots yet anyway.

TornadoTed

sontec 1 RU build thread
« Reply #44 on: August 29, 2008, 02:58:45 AM »
Quote from: "SALSA"
Quote from: "TornadoTed"
I've decided to go with the Forrsell opamps instead of the OPA604.

Which ones should I use for IC6 and IC8?


Cheapest solution if you want to go Forssell : DLR-1 for IC8 and JFET-992 for IC6

Cheers,

Mike


Which parts, if any do I need to leave out if I use the Forssell DLR-1 and JFET-992?

Anyone know where I can get the 12pf Silver Micas. I have tried Mouser, DigiKey, Banzai, RS and Farnell?
Giant Wafer Studios

www.giantwafer.com

sontec 1 RU build thread
« Reply #45 on: August 29, 2008, 03:26:45 AM »
Toronto Ted,

don't need to leave any parts our for the line receiver and 993.

you can get the 12pf silver mica on ebay....

best

Pete

crisotop

sontec 1 RU build thread
« Reply #46 on: August 29, 2008, 04:21:56 AM »
Igor seiad 10p is perfectly fine for those, at least i use them....

cheers
christoph

TornadoTed

sontec 1 RU build thread
« Reply #47 on: August 29, 2008, 06:15:00 AM »
I just found the 12pf on eBay, many thanks.

I double checked my list and I have everything now except the 4.7uf Poly

What are you guys using there?

Also it says use 4k7 resistors for more boost/cut on the bottom side of the board.

I have a Purusha case with 12dB of cut/boost. Do I need to use those resistors to roughly match the value on the case?

Many apologies if i am asking stupid questions, this is my first solo build and I only have a very basic knowledge of electronics!
Giant Wafer Studios

www.giantwafer.com

crisotop

sontec 1 RU build thread
« Reply #48 on: August 29, 2008, 06:43:48 AM »
I bought this massive Wima from Banzai...

I'm not sure about the resistor values either, would be handy to know which value comes closest to +/-12dB...

hth, christoph

bearblock

sontec 1 RU build thread
« Reply #49 on: August 29, 2008, 07:40:17 AM »
re. the 4.7uf poly - a similar Wima can be found at Farnell, order code 1006056. that's what I used.


khstudio

sontec 1 RU build thread
« Reply #50 on: August 29, 2008, 09:32:08 AM »
Quote from: "crisotop"


I'm not sure about the resistor values either, would be handy to know which value comes closest to +/-12dB...

hth, christoph


uh oh... I'm using the 12dB scale & just loaded the 7.5's :?:

I'd like to know too before I mount the Pots.
Kevin ~ KHStudio

Igor

sontec 1 RU build thread
« Reply #51 on: August 29, 2008, 09:40:24 AM »
Hi, 4k7 will give exactly +/-12db.
http://www.ij-audio.com
(new site hopefully will be up in July)

khstudio

sontec 1 RU build thread
« Reply #52 on: August 29, 2008, 09:57:57 AM »
Quote from: "Igor"
Hi, 4k7 will give exactly +/-12db.


Thanks Igor. :thumb:

Can I ask which way you prefer it?
I see that you also used Tat's case with the 12dB scale... did you set yours up with the 4.7's?

I may have some de-soldering to do today. :sad:
Kevin ~ KHStudio

king-rb

sontec 1 RU build thread
« Reply #53 on: August 29, 2008, 02:19:25 PM »
yehaaa...

i finished the sonntec!!! and it sound extreme cool! today i will check the eq on a mastering session.
...but i think i have to de solder the 7k5 and put 4k7 in for 12 db boost/cut..

Igor

sontec 1 RU build thread
« Reply #54 on: August 30, 2008, 01:27:11 PM »
Hi, yes, I using 4k7 or 5k6 (which at stock at the moment).
If boost/cut less then 11.5 db with (4.7...5.6)k, just check
if filter's caps - 4u7, 3n3, 0.47u, 330p, 0.15u, 100p have 5%
tolerance with cap' meter.
http://www.ij-audio.com
(new site hopefully will be up in July)

nielsk

sontec 1 RU build thread
« Reply #55 on: August 30, 2008, 10:33:52 PM »
Has anyone had luck getting the pots? I inquired with Alphastat, they email me every 4 months or so in German, suffice it to say I have not been able to place an order yet

khstudio

sontec 1 RU build thread
« Reply #56 on: August 31, 2008, 10:22:25 AM »
Quote from: "nielsk"
Has anyone had luck getting the pots? I inquired with Alphastat, they email me every 4 months or so in German, suffice it to say I have not been able to place an order yet


I had a feeling they would be hard to get (when I placed the order for the PCB's) which is the reason I paid the extra for the KIT. :wink:

It was a lot of money for us USA folks but worth it for less headache.

Check with Igor about a POT & Switch KIT. he may still have some.
Kevin ~ KHStudio

TornadoTed

sontec 1 RU build thread
« Reply #57 on: September 02, 2008, 05:34:42 AM »
What happens at the spot on the PCB marked FB with a resistor outline with 0 in it?

A jumper?

Since I posted this I got the pots through the post from Igor. There are,

1x 270 - XS8776 - 0826 with 5 pins
3x 270 - XS8787 - 0827 with 3 pins

I'm confused as to why I have different 5k pots rather than 4 the same.

Does the 1x 270 - XS8776 - 0826 have to go in a certain position?
Giant Wafer Studios

www.giantwafer.com

khstudio

sontec 1 RU build thread
« Reply #58 on: September 02, 2008, 08:31:33 AM »
I received my Pots too.  :green:

But I can't answer your question.


Thanks Igor!!! :thumb:
 :guinness:  :sam:  :guinness:  :sam:  :guinness:
Kevin ~ KHStudio

crisotop

sontec 1 RU build thread
« Reply #59 on: September 02, 2008, 08:38:34 AM »
If I remember it right the five-pin version is the 'Q' Pot for the low frequency band - will be back home in a couple of hours and can double check.

hth, christoph


 

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