Preamplifier from German magazine Klang&Ton

supernet · 5th February 2004, 08:05 PM

Some time ago, Klang&Ton - German DIY speaker magazine-published a "top end" preamplifier which has an output impedance close to 0, so it should drive any cable any time.

input Z : 10 kohm
output Z : <1 ohm
signal to noise ratio : >100 dB
slew rate 9V /us
Rise falltime: <1,5 us
max output voltage : >8 V eff

What is your opinion about this preamplifier schematic??

Cybergent · 5th February 2004, 11:18 PM

Can you bring up the picture with better quality?

peranders · 6th February 2004, 05:16 AM

If the opamps are OPA134, OPA627, AD8610, LT1028 etc etc. I think it looks quite alright but can you get more info about the parts?

Werner · 6th February 2004, 05:54 AM

From what I can make from that schematic there is an almost total lack of care for the power supply.

peranders · 6th February 2004, 06:33 AM

The PS could be more serious maybe. The last thing, is it a power amp or is it only a buffer? Hard to see at the schematics.

supernet · 6th February 2004, 04:03 PM

Sorry about quality, because original circuit in pdf format is over 1,5 M and I could not post it here.Maybe try it with 500× zoom in Word.

This preamplifier has two stages. First is op 5532 and second is a "small amplifier" with bd 139/140 output transistors. Power supply is made with 7815/7915 regulators.

Maybe has anybody idea how to convert a large pdf file into something small indeed?

arasuk · 6th November 2004, 04:12 PM

hi,

could you post me the full Schematic of the preamplifier.

arasukumar@yahoo.com

thanks
arasuk

Elso Kwak · 6th November 2004, 06:50 PM

Quote:

Originally posted by supernet
Sorry about quality, because original circuit in pdf format is over 1,5 M and I could not post it here.Maybe try it with 500× zoom in Word.
Maybe has anybody idea how to convert a large pdf file into something small indeed?

Hi supernet,
Probably a zipped Postscript file will be legible given the forum's restrictions of 800x 1200 Pixels and a maximum file size of 102400KB.
You could try Adobe Phoptoshop converting to GIF and/or resize resample with Irfanview.
Oops, I just see that Photoshop can also resize (just have it 15 minutes on my PC)

destroyer X · 6th November 2004, 07:24 PM

It was 800 by 600!

Can we use 800 by 1200

Cacilda Elso!..... Regards Elso

Carlos

Elso Kwak · 6th November 2004, 07:36 PM

Quote:

Originally posted by destroyer X
It was 800 by 600!

Can we use 800 by 1200

Cacilda Elso!..... Regards Elso

Carlos

Hi Carlos, The zipfile was 66kB.

5th February 2004, 11:18 PM	#2
Cybergent diyAudio Member Join Date: Jan 2004 Location: Germany / Bavaria / Augsburg	Can you bring up the picture with better quality? __________________ Best Regards, Cybergent

6th February 2004, 05:16 AM	#3
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	If the opamps are OPA134, OPA627, AD8610, LT1028 etc etc. I think it looks quite alright but can you get more info about the parts? __________________ /Per-Anders (my first name) or P-A as my friends call me

6th February 2004, 06:33 AM	#5
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	The PS could be more serious maybe. The last thing, is it a power amp or is it only a buffer? Hard to see at the schematics. __________________ /Per-Anders (my first name) or P-A as my friends call me

6th November 2004, 04:12 PM	#7
arasuk diyAudio Member Join Date: Dec 2003 Location: bangalore	preamplifier!!!! hi, could you post me the full Schematic of the preamplifier. arasukumar@yahoo.com thanks arasuk __________________ thanks a many for the diy audio for its existence.

6th November 2004, 07:24 PM	#9
destroyer X diyAudio Member Join Date: Feb 2004 Location: Recife - Brasil Northeast	Cacilda Elso, Dear Elso.... are you sure? It was 800 by 600! Can we use 800 by 1200 Cacilda Elso!..... Regards Elso Carlos __________________ Try to build an amplifier folks ... it is pure adrenaline!


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

6th February 2004, 05:54 AM	#4
Werner diyAudio Member Join Date: Jan 2002 Location: Belgium	From what I can make from that schematic there is an almost total lack of care for the power supply.

6th February 2004, 04:03 PM	#6
supernet diyAudio Member Join Date: Dec 2001 Location: Europe	Sorry about quality, because original circuit in pdf format is over 1,5 M and I could not post it here.Maybe try it with 500× zoom in Word. This preamplifier has two stages. First is op 5532 and second is a "small amplifier" with bd 139/140 output transistors. Power supply is made with 7815/7915 regulators. Maybe has anybody idea how to convert a large pdf file into something small indeed?

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Klang+Ton Eos Plans? Anyone?	ronning	Multi-Way	0	27th December 2006 06:23 PM
Jordan JXR6HD in german DIY magazine Klang&Ton	stefanK	Full Range	20	5th August 2006 08:05 AM
article in german magazine	cph2000	Multi-Way	11	27th November 2005 04:56 PM
Klang + Tong now on-line	planet10	Everything Else	0	22nd November 2005 08:33 PM
Plans for Klang + Ton CT 202	Tuliman	Multi-Way	0	29th July 2005 01:39 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read