Welcome Guest! To enable all features please Login or Register.

Notification

Icon
Error

Login


Options
View
Go to last post Go to first unread
salutes  
#1 Posted : Wednesday, February 14, 2007 2:56:29 PM(UTC)
salutes

Rank: Member

Groups: Member
Joined: 2/14/2007(UTC)
Posts: 2
Canada
Location: Mahone Bay

What are the impedance characteristics of the preamp?

Could this be used as microphone preamp?

Thanks,
Scott
Russ White  
#2 Posted : Wednesday, February 14, 2007 3:10:10 PM(UTC)
Russ White

Rank: Administration

Groups: Administration, Customer
Joined: 10/24/2006(UTC)
Posts: 3,979
Location: Nashville, TN

Thanks: 25 times
Was thanked: 89 time(s) in 83 post(s)
Hi Scott,

If you use the instrumentation amp in front (the standard configuration) the input impedance can be very high. It is 100K with the parts we will supply. But you can make it higher or lower if you choose.

The output impedance is that of the THS4131 itself which is very low around .33 ohm up through 500Khz.

I don't know any reason you could not use it as a balanced MIC pre. It should work fine.

Cheers!
Russ
salutes  
#3 Posted : Wednesday, February 14, 2007 3:34:20 PM(UTC)
salutes

Rank: Member

Groups: Member
Joined: 2/14/2007(UTC)
Posts: 2
Canada
Location: Mahone Bay

Thanks Russ

Maybe I missed it but have you posted the schematic for this circuit. I read the twisted missive a while ago but I don't remember seeing the schematic there.

Regards,
Scott
Russ White  
#4 Posted : Wednesday, February 14, 2007 3:40:40 PM(UTC)
Russ White

Rank: Administration

Groups: Administration, Customer
Joined: 10/24/2006(UTC)
Posts: 3,979
Location: Nashville, TN

Thanks: 25 times
Was thanked: 89 time(s) in 83 post(s)
Here you go. :)

We should have the schematic up on the product page soon.

Cheers!
Russ
Russ White attached the following image(s):
TXD.png (24kb) downloaded 210 time(s).

You cannot view/download attachments. Try to login or register.
imikanwar  
#5 Posted : Thursday, November 21, 2013 4:39:49 AM(UTC)
imikanwar

Rank: Member

Groups: Member
Joined: 11/21/2013(UTC)
Posts: 1
Location: newyork

Well now that you mention it, I have two with R0 and two that do not have a space for R0. Looks like R0 COULD be replaced with a jumper. The boards without look to be older, ligter green, and not much labeling. The ones with are bright green and have the number 336073 on top, and E235512 on the bottom.
l
Rss Feed  Atom Feed
Users browsing this topic
GuestUser (3)
Similar Topics
Sympatico Input Impedance / Volume Control (Sympatico)
by vlad 10/26/2015 2:39:43 AM(UTC)
ouput impedance - balanced outputs (IVY I/V Stage)
by Martin_B 3/29/2015 11:18:26 PM(UTC)
Input impedance "reading" for IV stage (IVY I/V Stage)
by Quadamp 3/25/2015 9:03:13 AM(UTC)
Output impedance (Legato Discrete I/V Stage)
by mjock3 7/4/2013 1:55:10 AM(UTC)
Correct R values for input impedance (Ventus Headphone Amplifier)
by tonentimbre 1/10/2013 3:12:10 PM(UTC)
IVY & Ultra high impedance headphones (IVY I/V Stage)
by hugonl28 10/7/2012 9:44:10 PM(UTC)
Constant input impedance? (Joshua Tree Attenuator)
by fvale 5/3/2012 4:43:54 PM(UTC)
Input impedance Joshua Tree (Joshua Tree Attenuator)
by hayo1991 1/15/2012 8:54:19 AM(UTC)
Output impedance of Legato 3 (Legato Discrete I/V Stage)
by glt 10/10/2011 11:56:54 AM(UTC)
input impedances for BAL/SE on legato III vs Ventus (Legato Discrete I/V Stage)
by RDK845 7/27/2011 1:11:00 AM(UTC)
Driving an amp with 5K Ohm input impedance? (IVY I/V Stage)
by thomaspf 7/3/2011 11:23:48 PM(UTC)
ideal driver impedance - 4, 8 or 15 ohm? (Sympatico)
by zkdaz 5/11/2011 7:54:39 AM(UTC)
Whats the ouput impedance of the balanced outputs (IVY I/V Stage)
by joefish 4/15/2011 8:12:02 AM(UTC)
Buffalo 24 and I/V stage w/ 60 ohm input impedance will it still be in current mode? (Buffalo DAC)
by sbelyo 3/30/2011 8:22:26 AM(UTC)
output impedance of Buffalo II ? (Buffalo DAC)
by stephen1212b 11/14/2010 12:12:30 AM(UTC)
Forum Jump  
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.