DIY something like iMPAMP??

nkko · 26th January 2006, 11:53 PM

Does anyone know where i can found similar DIY project with complete schematic to build?

Thanks for any help!!!

nkko · 27th January 2006, 09:42 AM

sorry here is a link impamp

and can someone suggest me a pair of good speakers thet would play nice with that kind of amp.

i need it mainly for my ipod and laptop pc.

pinkmouse · 27th January 2006, 09:50 AM

That is so sweet!

I would go for something like the new Jordan JXR6 drivers to match that.

andrei · 27th January 2006, 10:48 PM

I designed a small 6SN7-6BX7 push-pull amp using commodity parts - see schematics. Three tubes, single PCB construction, solid state HT rectifier, toroidal output transformers. Not as compact as iMPAMP, but a little bit beefier at 5W/channel.

andrei · 27th January 2006, 10:53 PM

PCBs are already laid out and manufactured - they are 4x5.5 inches, double side, solder mask over silver-plated copper. I just need build a prototype and test it

.

andrei · 28th January 2006, 01:39 AM

I've taken a look at the iMPAMP web page - it's a cute design. Here is my reverse-engineering summary:

Amplifier topology is a single stage push-pull using 6021W sub-mini tube. That tube has 0.7W anode dissipation rating, which means that it runs in Class B to get 1W output. Bias for PP pair is done with a single blue LED. External 12V/1A PSU feeds two 6021 heaters in series, and HT is stepped up inside by a pair of AMVECO 70000K 1.6W toroids connected in reverse. Rectifier is obviously solid state. The only thing which is not quite clear is how phase splitting is done in a front-end...

Peter M. · 28th January 2006, 02:34 AM

Cool amp!

Fostex FE207E has a high sensitivity, 95db/W you`ll need it with just a one watt amp.

5902 subminiature pentode has a max anode dissipation of 4W, could make a cool little single ended 1W spud-amp...
Oh no, I got a couple of them in my drawer, juuuuust what I needed now, another project...

Regards,
Peter

Peter M. · 28th January 2006, 02:55 AM

http://www.roehrentechnik.de/html/kolibri.html

http://www.jogis-roehrenbude.de/Lese...rmann-Mini.htm

Peter M. · 28th January 2006, 03:16 AM

http://mapage.noos.fr/dom.mafrand/schematics.htm

http://amps.zugster.net/projects/sub...e/gallery.html

userguide · 11th March 2006, 03:22 AM

Andrei,

You're right !

Here what I found to complete the reverse-engineering of the ImpAmp:

Two OP275 phase-splitter like this circuit (see pic)

(Personnaly I prefered the DRV134 for phase splitting)

Transformer: Fender W022913 (125A10B)
PART# 022913
MOUNTING 2 13/16"
HEIGHT 2"
LENGTH 2 5/16"
WIDTH 2"
WATTS 12
PRIMARY 8500 CT
SEC 8

So nothing missing to build a ImpAmp clone !?

Let's build the YinYamp !

26th January 2006, 11:53 PM	#1
nkko diyAudio Member Join Date: Jan 2006 Location: nkko	DIY something like iMPAMP?? Does anyone know where i can found similar DIY project with complete schematic to build? Thanks for any help!!!

27th January 2006, 09:50 AM	#3
pinkmouse diyAudio Moderator Join Date: Apr 2002 Location: Chatham, England	That is so sweet! I would go for something like the new Jordan JXR6 drivers to match that. __________________ Al I conceive of nothing, in religion, science or philosophy, that is more than the proper thing to wear, for a while. Charles Fort

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
What do you think about my design (based on IMPAMP)	jtrujillo	Tubes / Valves	5	29th June 2006 10:50 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

27th January 2006, 09:42 AM	#2
nkko diyAudio Member Join Date: Jan 2006 Location: nkko	sorry here is a link impamp and can someone suggest me a pair of good speakers thet would play nice with that kind of amp. i need it mainly for my ipod and laptop pc.

28th January 2006, 01:39 AM	#6
andrei diyAudio Member Join Date: Dec 2002 Location: Canada	I've taken a look at the iMPAMP web page - it's a cute design. Here is my reverse-engineering summary: Amplifier topology is a single stage push-pull using 6021W sub-mini tube. That tube has 0.7W anode dissipation rating, which means that it runs in Class B to get 1W output. Bias for PP pair is done with a single blue LED. External 12V/1A PSU feeds two 6021 heaters in series, and HT is stepped up inside by a pair of AMVECO 70000K 1.6W toroids connected in reverse. Rectifier is obviously solid state. The only thing which is not quite clear is how phase splitting is done in a front-end...

28th January 2006, 02:34 AM	#7
Peter M. diyAudio Member Join Date: Jan 2005 Location: Østfold	Cool amp! Fostex FE207E has a high sensitivity, 95db/W you`ll need it with just a one watt amp. 5902 subminiature pentode has a max anode dissipation of 4W, could make a cool little single ended 1W spud-amp... Oh no, I got a couple of them in my drawer, juuuuust what I needed now, another project... Regards, Peter

28th January 2006, 02:55 AM	#8
Peter M. diyAudio Member Join Date: Jan 2005 Location: Østfold	http://www.roehrentechnik.de/html/kolibri.html http://www.jogis-roehrenbude.de/Lese...rmann-Mini.htm

28th January 2006, 03:16 AM	#9
Peter M. diyAudio Member Join Date: Jan 2005 Location: Østfold	http://mapage.noos.fr/dom.mafrand/schematics.htm http://amps.zugster.net/projects/sub...e/gallery.html

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