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View Full Version : Tube preamplifier ton corection Dr.Bora Jagodic design



alex mm
07-24-2010, 06:38 PM
Hi all ,
My first tube preamplifier , was build few months ago and I'm very pleased how it sound .
Schematic diagram and PCB designed by Dr.Bora Jagodic .;)

Alex.

flyingpig
07-25-2010, 09:15 AM
Very nice project, I wish I could make one like this, But I knew its costy.

is it?

alex mm
07-25-2010, 02:45 PM
........the price it's almost 100 euro and more pictures

johnhenry123
11-22-2010, 10:18 PM
greetings,

If you don;t mind. can you share the pcb and laout and schematics?
Do you have the files in pdf form?

thank you

flyingpig
02-01-2011, 02:43 PM
Do you have any amp in stock to sell me one?

alex mm
02-02-2011, 11:08 AM
Sorry it was build for home not for sale .I can give you this link http://bas.elitesecurity.org/indexV.html

radio
04-23-2011, 05:53 AM
Hello!:UP:
Is someone measured the preamplifier, as soy second and third harmonic?
Of them can be seen eating this Tube preamplifier has the right Tube (Valve) sound!
Thanks

P.S.
Where you can find the project Tube preamplfier: IOTA-CD of D-r Bora?:w)

alex mm
04-23-2011, 07:25 PM
875876Hi radio ,
No I have not make any mesurements regarding preamplifier but the sound it's what i like to hear ! yes you right it's an valve sound , warm , dinamic .......
I dont know any link to IOTA -CD of Dr. BORA J. but I have something saved in my computer .

radio
04-24-2011, 07:55 AM
Hello Mr. Alex !
Is this you have the PCB for a complete project (IOTA-CD) !
Since I do I create this Hibrid Audio Amplifier!!
thank you
Best Regards

vikramjoshi
07-24-2012, 06:21 PM
Hi Alex,
Pcb layout for this preamp is not available at website, can you post it.
TY

alex mm
07-25-2012, 12:26 PM
Hi TY,
Sorry for delay ....... if you need something else please ask ......;)
regards
Alex.

vikramjoshi
07-26-2012, 07:10 PM
I will be starting to collect parts soon.
do you have a better copy of component lay out.

alex mm
07-27-2012, 12:50 PM
and component side , top side .......

vikramjoshi
07-29-2012, 09:57 AM
and component side , top side .......

Thank You, Will start with pcb etching.

vikramjoshi
08-03-2012, 08:45 PM
Alex,
any guidance how to get this Pre amp working,
at couple of places its written bypass what is it for and what to do with balance.

I am Readying the BOM,
there is trim pot on Psu Pcb, How much to adjust it for what current.
And specification about brand of parts to be used or I can use as per availability.

Tony54
09-30-2015, 06:03 AM
Mr Alex Best regardS!
One question: Do you have a PCB board this hybrid amplifier (IOTA)?
If you have to buy it in Macedonia-Skopje?
Thank you!

CobraNet
01-28-2017, 01:51 PM
Very nice project!

Hadighorbani
12-10-2017, 05:39 AM
Hi TY,
Sorry for delay ....... if you need something else please ask ......;)
regards
Alex.

Hi Alex
thank you for sharing this project
very nice
can you please share schematic in PDF file and good quality?
i want crate new PCB for this project and share it here
do not need wire more in new PCB
thank you
my email address is Hadi.ghr.e.61@gmail.com
you happy me if share more project by tube lamp with me
thank you so much dear and have a good time.

alex mm
12-11-2017, 03:36 AM
Hi,
Thank you for comments, schematic attached !
Regards,Alex 6475

alex mm
02-10-2019, 07:35 PM
Hi all,
New year, new build ,since this nice preamplifier with tone correction it's working from 2010, I decided to rebuild in new revisited PCB . Here are the pictures
Regards,
Alex

Silvio
02-10-2019, 08:24 PM
Nice work Alex congratulations well done

nbadules
05-17-2019, 01:08 PM
Very nice work and PCB. Do you have the Gerber files for the PCB?

Thanks!

alex mm
05-18-2019, 10:49 AM
Hi,
Yes I have gerbers but are not available . Final product ....

vikramjoshi
05-19-2019, 02:52 PM
Nicely done. Can you share revised Pcb and schematics.

nbadules
05-24-2019, 06:16 AM
Just let him enjoy it! Maybe after he gets bored he'll then share it.x-(