Igor

« Last Edit: June 11, 2011, 02:51:34 PM by Igor »
http://www.ij-audio.com
(new site hopefully will be up in July)


clintrubber

Re: Preamplifier's universal input board
« Reply #1 on: January 24, 2009, 05:00:14 PM »
Looks better suited for the Black Market.

Please split into ordering (BM) & building-info/support (here in The Lab).

Regards,

  Peter

pedroplanet

Re: Preamplifier's universal input board
« Reply #2 on: January 24, 2009, 10:20:38 PM »
sorry for the newbie question, but, what is this?is it based on something?

Igor

Re: Preamplifier's universal input board
« Reply #3 on: January 25, 2009, 08:07:50 AM »
@ Peter: Agreed! :)
@pedroplanet: say, you cloning 1272 and need input board with
pad, phase, phantom and HI-Z DI discrete circuit
before input transformer...here it is.
http://www.ij-audio.com
(new site hopefully will be up in July)

Re: Preamplifier's universal input board building info/support
« Reply #4 on: February 11, 2009, 08:28:24 AM »
so..........does it works with this project:

http://www.groupdiy.com/index.php?topic=22828&start=0

neve 1073 preamp......

if its ok, how to connet it?

excuse me foe my newbie question........


niko

3nity

Re: Preamplifier's universal input board building info/support
« Reply #5 on: February 11, 2009, 08:36:26 AM »
Well it says universal! it fits any front end preamp!
but to answer your question yes it will work!

wiring its very simple you wire the mic where it says mic,  the preamp from where it says pre.
you need to feed this with 24V and 48V where its marked.
look at this image:
Life is a path, death the destination.

Re: Preamplifier's universal input board building info/support
« Reply #6 on: February 11, 2009, 12:25:47 PM »
ok, thanks 3nity
and excuse me for my newbie question......

stereokillah

Re: Preamplifier's universal input board building info/support
« Reply #7 on: February 19, 2009, 04:30:59 PM »
hi Igor, could you give us the cut size  for the front panel please, i would to buy some kit but i need to know if it's possible to add it on my front panel.
thanx
if your neighbour is hunger .. don't give him fish, teach him how fishing ...

Igor

Re: Preamplifier's universal input board building info/support
« Reply #8 on: February 20, 2009, 09:00:21 AM »
Here's the measures.

You can use it as drilling template, resolution is 300dpi.

http://i251.photobucket.com/albums/gg291/diy33609/in_pcb.jpg
http://www.ij-audio.com
(new site hopefully will be up in July)

stereokillah

Re: Preamplifier's universal input board building info/support
« Reply #9 on: February 20, 2009, 11:51:31 AM »
thanx Igor
if your neighbour is hunger .. don't give him fish, teach him how fishing ...


Whoops

Re: Preamplifier's universal input board building info/support
« Reply #10 on: March 17, 2009, 10:22:53 PM »
is it similar to the JLM go between?

Igor

Re: Preamplifier's universal input board building info/support
« Reply #11 on: March 18, 2009, 06:15:44 AM »
Same purpose, but bit different idea, different schematic. Just compare by schematics etc.
http://www.ij-audio.com
(new site hopefully will be up in July)

crisotop

Re: Preamplifier's universal input board building info/support
« Reply #12 on: May 23, 2009, 05:03:26 AM »
Igor,

do you accidentally have a source for the gain knob on the ba-33 amplifier as shown right at the picture?

thanks!
christoph

RedNoise

Re: Preamplifier's universal input board building info/support
« Reply #13 on: August 09, 2009, 08:35:26 AM »
Hi...I assume D3,4,5,6 are 4148 correct??
Do not know what D2 is...914 , is it swapable with another # ? :P
Regarding C3 , what do you meant by "C34,5x11" ??



Edit : 1N914 eg:[email protected]
« Last Edit: August 10, 2009, 01:25:48 PM by RedNoise »
If your neighbour is hunger : don't give him fish , teach him how to fish ...
if you don't like it don't buy it ;-)  [Wolker Texas Ranger] ( ;-) )

Igor

Re: Preamplifier's universal input board building info/support
« Reply #14 on: August 09, 2009, 11:40:11 AM »
Hi, all diodes are 1n4148 or 1n914.
4.5x11 came from Eagle package, it is measures, don't relate to this.
http://www.ij-audio.com
(new site hopefully will be up in July)

RedNoise

Re: Preamplifier's universal input board building info/support
« Reply #15 on: August 10, 2009, 01:23:15 PM »
Thanks for the reply,
"22utant" makes me wonder if it should be a tantalum cap?
The one on your pic seem to be polarised lytic...What should I do please ?

Also , I've had short search about 520R , seems hard to find (Banzai , Selectronic...)Would 510R do the trick?
« Last Edit: August 10, 2009, 01:26:36 PM by RedNoise »
If your neighbour is hunger : don't give him fish , teach him how to fish ...
if you don't like it don't buy it ;-)  [Wolker Texas Ranger] ( ;-) )

3nity

Re: Preamplifier's universal input board building info/support
« Reply #16 on: August 10, 2009, 01:27:51 PM »
Some times yoyu can use lytics in place of tants...and vice versa..
Life is a path, death the destination.

RedNoise

Re: Preamplifier's universal input board building info/support
« Reply #17 on: August 10, 2009, 01:31:48 PM »
Great!Thanks 3nity!
If your neighbour is hunger : don't give him fish , teach him how to fish ...
if you don't like it don't buy it ;-)  [Wolker Texas Ranger] ( ;-) )

tazwolf

Re: Preamplifier's universal input board building info/support
« Reply #18 on: August 15, 2009, 08:28:19 AM »
Hi
what voltage should the 1uf and 22uf tantalum capacitor be? I have 22uf 16v can i use that?

/Taz

nielsk

Re: Preamplifier's universal input board building info/support
« Reply #19 on: August 21, 2009, 09:37:13 AM »
would this work with +18 instead of +24? Maybe a voltage drop resistor & a 12 volt relay.... this would open it to use with other preamps that do not use +24V.
Does the JFET DI really need +24, or would it work fine with +18? It seems like an 18 volt swing into a mic pre would be plenty.....
What are the board dimensions?


 

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