G.Kleinschmidt said:
Dude, I've done this already! Check this out:
http://homepages.picknowl.com.au/glenk/hybrid2.jpg
Glen
... so super preamp has turned into a power hybrid
... in this latest version
lineup
just kidding ... But what is stopping you from uploading
... latest version of super preamp
... To me, it would not be more trouble
... than have to login to mailbox and send emails with attachments
!
Well, with hope that this won't disappoint you (there is no reason why it
should, because your design is excellent!), I know for very similar design
done about 6 years ago by Dr. Jagodic (boraomega on this forum). In recent
years, several people built flat = LINE preamps based on this schematic
(with minor mods) and it is one of better line preamps I heard so far.
Those designs on his WEB site are mostly his medium class designs but his
HighEnd designs he never published because of commercial reasons. Just few
close friends have access to that collection. Here is the schematic. Sorry
no components values, it will be unfair to Bora if I put values.
Well, with hope that this won't disappoint you (there is no reason why it
should, because your design is excellent!), I know for very similar design
done about 6 years ago by Dr. Jagodic (boraomega on this forum). In recent
years, several people built flat = LINE preamps based on this schematic
(with minor mods) and it is one of better line preamps I heard so far.
Those designs on his WEB site are mostly his medium class designs but his
HighEnd designs he never published because of commercial reasons. Just few
close friends have access to that collection. Here is the schematic. Sorry
no components values, it will be unfair to Bora if I put values.
Attachments
lineup said:
Because that Hybrid power amp schematic .jpg took about 50 minutes to "PrintScreen" multiple zoomed-in sections and then tediously put them all together using Microsoft Paint.
My schematic drawing program only saves files in *.SCH format, which can only be read by people with the same software.
I'll post the final schematic when I'm finished! At the moment I'm very busy laying out the PCB.
Cheers,
Glen
G.Kleinschmidt said:
I wouldnt bother.
Because
In 1 minute I take a
Screen Capture
of any circuit in
any open program window
on my PC Screen
... with my image viewer editor freeware:
XnView.com Free download All languages
This has A Perfect Capture Tool that I use.
Regards
lineup
G.Kleinschmidt said:
Glen SmallSchmidt.
Your attchement is 'ONLY' 648x388 pixels, 101228 bytes
while you could make it like my screen: ~980 x 600
I understand you had to do it less than 102400 kByte
But you have to FIRST reduce and compress the image
(for example using Free http://www.xnview.com/ image converter-editor)
1
Change from 'True Colors' to maybe '256 colors'or even change to 'Grey 256'
(this is black->white in 256 different shades of Grey)
The ultimate smallest color is 'Binary', see www.XnView.com Image converter menu!
Where only is All Black + all White pixels.
Bi= two, that is the file ha got '0' for black point, and '1' for white
and nothing in between.
2
Secondly, when you save the new version with less many colors.You click Save As.
You click Options
In options for a JPG you can select compression level:
0-100%,
where 100% = full size, NO compression, BIG file
and I most often use something like 50%-75%, which gives much smaller file.
=============================================
Following these both option will make it possible
to create a very big size image = 980x 650 pixels
and still have small size file ... <100kByte
1. Reduce number of colors. Avoid True Colors. Try 256 colors first.
2. Resize image to good big size to fill screen in webbrowser ~960x600
3. Save As ... with Option Compression down to file size 50-70%
good luck
hope it helps
lineup
----- if I was with you at your PC friend G.Klein, I would show you how to -------
============================
this image was much reduced, from original more than 3072x2304 digital camera JPG
with file size ~3 Mbyte!!
to only: 506x480 jpg - 70167 bytes
http://www.diyaudio.com/forums/attachment.php?s=&postid=1020142&stamp=1159861199
It is from a Topic with
very many images of Very Ugly Stuff people have built.
UGLY Looking Amp! - but good working
isnt it a pity
so many members do make such many ugly amplifiers & things
makes you feel a bit sick for christmas
lineup
G.Kleinschmidt said:
That's looking really good. I see you've used U404s rather than their SST versions... Is this a local availability thing?
I'm naughty, and often just leave designators off altogether with smaller stuff. I figure I can always print out a mudmap so that I can see what goes where.
Cheers,
Suzy
lineup said:
Lineup, that's basically the window size in of my schematic drawing program. Even if the whole schematic was shrunk down to 1024 X768 it would still be rather crappy.
suzyj said:
Thanks, and yes, the U404 are a Farnell part. I've also changed the cascode jfets to individual devices; SST201 (also from Farnell).
It probably would be a bit pedantic to keep all the designators and tidy them all up - I'll be etching this board myself after all
Cheers,
Glen
G.Kleinschmidt said:
I see.
Guess you could post the full final schematic of Super Amp
at some website, later.
It would be nice to try to understand and explore your circuit
not only for me, I think.
If I get a PDF for download, I would try to make some images from it.
I might need 2 images to cover the whole amp circuit.
Have far has the practical testing come?
Are the boards made?
Regards to G.Klein
lineup
lineup said:
I see.
Guess you could post the full final schematic of Super Amp
at some website, later.
It would be nice to try to understand and explore your circuit
not only for me, I think.
If I get a PDF for download, I would try to make some images from it.
I might need 2 images to cover the whole amp circuit.
Have far has the practical testing come?
Are the boards made?
Regards to G.Klein
lineup
The design is finished but I haven't made anything yet. I've been doing home renovations over my summer break instead. I've totally redesigned my power amp too.
Cheers,
Glen
G'day Hartono.
Unfortunately I abandoned the design after deciding on a different approach for my power amp. I have a much better MKII version designed on paper and tested in spice for my 2kW A+ amp, but I just havent got enough time at the moment to get onto it, with all the other parts of the project still in the way.
It will eventually get described on my super amp page (with updates in the thread dedicated to that project):
http://users.picknowl.com.au/~glenk/2000W.HTM
Cheers,
Glen
Unfortunately I abandoned the design after deciding on a different approach for my power amp. I have a much better MKII version designed on paper and tested in spice for my 2kW A+ amp, but I just havent got enough time at the moment to get onto it, with all the other parts of the project still in the way.
It will eventually get described on my super amp page (with updates in the thread dedicated to that project):
http://users.picknowl.com.au/~glenk/2000W.HTM
Cheers,
Glen
G.Kleinschmidt said:
GKlein.
how is this one coming on .. your superamp ?
we were several that were quite SHOCKED by this remarkable fully differetial hifi pre-amplifier
when you first TRIED TO publish it
( your old website is closed down now )
maybe this one went into some other of your projects
Regards, Lineup
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.