Post your Solid State pics here. - Page 112 - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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
Reply
 
Thread Tools Search this Thread
Old 29th September 2009, 09:49 PM   #1111
fotios is offline fotios  Greece
diyAudio Member
 
fotios's Avatar
 
Join Date: Feb 2007
Location: Δραμα - North Greece
Quote:
Originally Posted by Wavebourn View Post
Mine look better. Let's build something together?

I develop schematic, design we develop together, you build it really nice. Then my friend draws everything, we find manufacturers and dealers, and get some money for bread and butter, and for new even better things to design and build.

Anatoliy
Yea, why not? Something like an active loudspeaker in style of column, with enough 5,5" drivers, 2 or 3 tweeters, and in the bottom of box two 8" drivers in any combination. Each driver will cover a region of spectrum, and will have its own amplifier. The amplifiers will be attached on the loudspeaker and will be driven from a special preamplifier. In preamplifier will be incorporated electronic x-overs, level controls and regulated phase correction circuits for each amplifier-driver separately. The final regulation of loudspeakers will be in the customer room, with the aid of a good analyzer and a good microphone.
That is the absolute solution. Do you think that we could find people to sell something like this?
I am kidding of course.
OTOH i am open in any applicable proposition and deal.
As for the measurements, was for fun. What can you measure using a SB-XFi Platinum of 24b/96KHz? The software it is very good but it needs an equal value ADC/DAC interface. I have an ASUS Xonar Essence STX which is superior but it is very delicate. I have burned the ADC of one and this which i have now, it is replacement (free of charge) from the shop of purchase. I fear to connect in its input the output of an amplifier be it so via attenuation network.
Instead the SB X-Fi it is like a rock in abuse. Look at the picture a new spectral analysis with 4096 FFT size and 8192 points record length taken from the back in/out of sound card. The first was from the front panel in/out. The THD is improved and the SNR is degraded.
Actually, the output noise level of amplifier measured with a trusty DSO it is between 0,8-1,2mV without input signal and with the vol pot either full closed or full opened. It is not so bad for a BJT class B amplifier of 2 X 170 Wrms/8Ω with a closed loop gain of Av=30. I will show a picture tomorrow.

Fotios

Click the image to open in full size.
__________________
Best Regards FOTIS ANAGNOSTOU

Last edited by fotios; 29th September 2009 at 10:09 PM.
  Reply With Quote
Old 29th September 2009, 10:08 PM   #1112
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Quote:
Originally Posted by Wavebourn View Post
Sorry. Could not resist. His talent is great!

Yes, I've seen that movie. Thank you. Incredibly gorgeous. A WW-II history in the sand...
Takes a lot of inspiration to make something sentimentally moving out of sand. Melodic sand amps take a lot of talent too. No mean feat.
  Reply With Quote
Old 30th September 2009, 05:09 AM   #1113
diyAudio Member
 
Wavebourn's Avatar
 
Join Date: Sep 2006
Location: Pleasant Hill, CA
Send a message via Skype™ to Wavebourn
Quote:
Originally Posted by Salas View Post
Takes a lot of inspiration to make something sentimentally moving out of sand. Melodic sand amps take a lot of talent too. No mean feat.
Sure, I know that not only theoretically; all my tube designs contain sand regulators. All my previous designs contained sand only. Few last designs contain sand outputs, either class A, or A+C. I know how what characters different peaces of sand have, and if to use their characters properly great results may be obtained. However, it takes a talent, to mix together many ideas in imagination, threw what's not needed away, and come to something that has nothing more to remove. It is like sculpture, Greeks always were masters of it. Take a stone, remove from it what is odd, and get a statue. simple.
__________________
"Our youth [...] have bad manners, contempt for authority; they show disrespect for their elders, contradict their parents, [...] and tyrannize their teachers.” -- Plato, 447-367 BCE
  Reply With Quote
Old 1st October 2009, 08:22 PM   #1114
Salas is offline Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Quote:
Originally Posted by Wavebourn View Post
Sure, I know that not only theoretically; all my tube designs contain sand regulators. All my previous designs contained sand only. Few last designs contain sand outputs, either class A, or A+C. I know how what characters different peaces of sand have, and if to use their characters properly great results may be obtained. However, it takes a talent, to mix together many ideas in imagination, threw what's not needed away, and come to something that has nothing more to remove. It is like sculpture, Greeks always were masters of it. Take a stone, remove from it what is odd, and get a statue. simple.
Now what would make you think of something like that...just escapes me.
Attached Images
File Type: jpg Athena_back.jpg (127.7 KB, 1190 views)
  Reply With Quote
Old 1st October 2009, 08:26 PM   #1115
diyAudio Member
 
Wavebourn's Avatar
 
Join Date: Sep 2006
Location: Pleasant Hill, CA
Send a message via Skype™ to Wavebourn
Quote:
Originally Posted by Salas View Post
Now what would make you think of something like that...just escapes me.
I would say, roots of a modern culture are in ancient times of the Civilization.
__________________
"Our youth [...] have bad manners, contempt for authority; they show disrespect for their elders, contradict their parents, [...] and tyrannize their teachers.” -- Plato, 447-367 BCE
  Reply With Quote
Old 2nd October 2009, 05:48 PM   #1116
Electrons are yellow and more is better!
diyAudio Member
 
peranders's Avatar
 
Join Date: Apr 2002
Location: Göteborg, Sweden
Blog Entries: 4
Quote:
Originally Posted by Gyuri View Post
Dear Fotios!
I need your opinion.
I love it onto the idiotic one his pierced cover your amplifier.
Exceptionally precise, just like the rest of his parts for the thing.
But for me only single old B&D I have a drill, with a rack.
I took from my primary payment yet, before with 32 years.
That's right, we are old old men like this.
Let the deuce take it.
Oh now if I do not guide it the drill stem, crawls away into that goddamn aluminium the drill stem. The component of the mincer than drill scheme
may it be a solution?
Let my wife not find it out by the time I use her mincer only.
I desire to you a beautiful day:
Gyuri
Mister, please scale down your pictures!!! I have highspeed connection but it's a little perverse to link multimegapixel pictures. 800x600 is quite enough.
__________________
/Per-Anders (my first name) or P-A as my friends call me
Tube Buffered Gainclone in work |Thread || Diamond buffer |Thread for the group buy | Wiki
  Reply With Quote
Old 4th October 2009, 11:50 AM   #1117
fotios is offline fotios  Greece
diyAudio Member
 
fotios's Avatar
 
Join Date: Feb 2007
Location: Δραμα - North Greece
Default Well, you want to see the performance...

This is one of the many measurements that i did in my amplifier. I haven't any professional analyzer. OTOH, i have my books (and the Internet) from which i can derive the knowledge to make those things by myself. Bellow it is an AT WHOLE DIY figure designed on the blank paper.
Click the image to open in full size.

Fotios - member of M.O.A.N.
__________________
Best Regards FOTIS ANAGNOSTOU
  Reply With Quote
Old 4th October 2009, 05:00 PM   #1118
fotios is offline fotios  Greece
diyAudio Member
 
fotios's Avatar
 
Join Date: Feb 2007
Location: Δραμα - North Greece
Default Do you want more?

At your service!

Click the image to open in full size.

Fotios - Always available!
__________________
Best Regards FOTIS ANAGNOSTOU
  Reply With Quote
Old 4th October 2009, 07:04 PM   #1119
fotios is offline fotios  Greece
diyAudio Member
 
fotios's Avatar
 
Join Date: Feb 2007
Location: Δραμα - North Greece
Default One more measurement

Click the image to open in full size.

Not so bad for a humble class B power amplifier... implemented at whole with BJTs.

Fotios
__________________
Best Regards FOTIS ANAGNOSTOU

Last edited by fotios; 4th October 2009 at 07:16 PM.
  Reply With Quote
Old 4th October 2009, 07:08 PM   #1120
fotios is offline fotios  Greece
diyAudio Member
 
fotios's Avatar
 
Join Date: Feb 2007
Location: Δραμα - North Greece
Default DSO capture of Charisma 0K6 output noise

Click the image to open in full size.

Fotios
__________________
Best Regards FOTIS ANAGNOSTOU
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



New To Site? Need Help?

All times are GMT. The time now is 11:31 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright ©1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2