Mes projets lampe

dsdn · **Posté:** Dim 06 Sep 2009, 09:40

I guess this is in your mind... I recently listen to a SE of 845, an ppp of gu 29, and then I couldn't tell wich one was playing...I could say that the SE was a bit colder than the gu29. :shock:

But just for fun... just a bit, you know. It wasn't the first time i've noticed that fact, and i wasn't the only one to do.
We listened with that system http://perso.wanadoo.fr/rififi/hifi/
wich is quite sensitive.Just a SE of 6b4g, can play it very loud. over 100 db per watt...
But we didn't have any pre idea about the amps. nor SE ( with only polypro or PIO caps even in alimentation ! :shock:

) nor pp of penthodes ( Gu 29 with electrolitycs caps), or pp with R120 wich are call french triode with pp caps in alim also no caps in the signal...
The less I could tell, is that the SE weren't the best in term of "tons", of "colour" of sound, and the SE were in my reminder, a bit "cold" and rigid to compare.
I do like both of them. And mon "amour" is is still my pretty wife...Even if I must get out my Pavillon ( wich were similar to Phil) to play with a pair of little 5" coral... :lol:

could you tell us a bit more about your amps with 6s41 or 6s33.I got a sympathic schem with 6s33 and ec86, if you like.

DAvid

azazello · **Posté:** Dim 06 Sep 2009, 23:29

My 1 variant of 6S41S was with driver 6P15P, then I used EC 96 / but the gain is not reached /, 6E5P, but I'm especially pleased by the latest version with EF860. In 1 version I used Uak 6S41S=140v, but the best result was with Uak=180 v and mixed Bias /auto and fixed/. The output transforner
1,5 kohm /15 sq. cm/ was with 4 sections of secondary coil, and 3 sections of primary coil
/2121212/. I ordred it in a factory in my town.
Ampl. with 6S33S was in 2 versions. Second was with separated PS for
driver and output tube. Ia - 280 and 40 ma....real windows's killer!!
But I like more 2A3's sound, fine, warm, detail... Have you heard it?
I lake it more than 300B / I compared with my fiend's ampl./.

azazello · **Posté:** Lun 07 Sep 2009, 09:07

Mon second projet de tube amplificateur 6S33S sans PSU

http://picasaweb.google.bg/azazello52/D ... 4079778834

Totof · **Posté:** Lun 07 Sep 2009, 17:07

Hi Azazello

Great amp, i like this kind of "philosophie"

Can you tell me about your precedent version with 6p15p

you said not enough gain , to drive completly the 6c41c i think
how mutch for this drive in best result :?:

Have you try 6J51P , an other little russian pentode

Have you more detail of the output trany
size of core,number of turns , thikness of insulation , so i can simulate with Yves'program

Have you some scope picture

thanks for your response

azazello · **Posté:** Lun 07 Sep 2009, 23:32

Hi, Totof!
My version with 6P15P /2 years ago/ was only few days....I remember apr.
Uk=2 v, Ia=25 ma, Ia=150-160 v. I liked this sound. After 6P15P I used
EC96, but the gain was small, then I used 6E5P - very good choice, but the best result was with EF860 - for some data I will visit my friend and measure
the conditions exactly..
I made 2 versions 6S33S & 6E5P - this proved very good pair with amazing sound.
About output transformer, it's very good russian version, ....1,2 kohm, 25
sq. sm, 0,35mm, 4 seconds coils for 8 ohms /90 turns, wire's d=0,8mm, conn. parallel/, 3 primary coils /330 turns, wire's d=0,4 mm, conn. serial/....The floors are like 2121212.
About frequency band, I measured with osciloscope...from 30-33 Hz to 25000
Hz, amplitude was apr. constant /input ampl. 1v, Routput=8 ohms/.
I haven't 6J51P....
Nikola

Totof · **Posté:** Mar 08 Sep 2009, 06:19

Hi Azazello

For your bandwidth you talk about -1 dB, not bad it's right

I see for the simulation of the output transformer
when i 'm be back
I go to work now

have a good day

azazello · **Posté:** Mar 08 Sep 2009, 10:40

http://picasaweb.google.bg/azazello52/M ... 7387255330
There aren't interstage wires. Wires are only between connectors and tubes,
this is a good condition for noiseless and hmmmmless work!
AC wires /12,6 and 6,3 v/ are on the left and right side, and DC wires are
in the middle.

azazello · **Posté:** Mar 08 Sep 2009, 21:47

http://picasaweb.google.bg/azazello52/A ... 0803460258
L'ampl. 6C33C avec PSU a gauche et le parleur Sansui 1700.

azazello

http://picasaweb.google.bg/azazello52/A ... 5602960706
Bon son, qui rappelle le son avant seconde guerre mondialle du 20-eme siecle!
/EL11 Telefunken & EF12 Telefunken & AZ11 Tungsram/.

azazello · **Posté:** Mar 12 Oct 2010, 15:24

My March project...Bruce Heran's Oddblock version with 6P3C-E & ECC83 & output tr-s PP
Hammond. Sound like SE, output power about 50% from regular PP!
http://picasaweb.google.bg/azazello52/A ... 3514767858

My May project....PP Oddblock version with 6P3S & ECC85
http://picasaweb.google.bg/azazello52/A ... 5581991970

My July prject ....PP Oddblock version 6005 GE $ ECC85 RFT & output PP tr. Hammond 1605
http://picasaweb.google.bg/azazello52/A ... 6538287906

My September favorite project....SE 6S4S /russian similar 2A3/ & 6J9P & 6Z5P
http://picasaweb.google.bg/azazello52/A ... 7606459746

azazello

http://picasaweb.google.com/azazello52/ ... 4232646610
http://picasaweb.google.com/azazello52/ ... 2692374338
DIY in Chicago - November.
Power transf. Hammond 369AX
Output tranies Hammond 125CSE
Chocke Hammond 154M
Chasse - Hammond 1444
6V6 Silvania
12AT Silvania
Caps - Black Gate, Rubycon
Resistors tantalum Jappan.

azazello · **Posté:** Jeu 06 Jan 2011, 23:12

My new project from begin of 2011....:
http://picasaweb.google.com/azazello52/ ... 4050970514
SE JJ 300B & 6E5P & OT Hammond - 90 mA.

azazello

https://picasaweb.google.com/azazello52 ... 9815226946
PP-variant Leibowitz- 6П1П /eq. to 6V6, 6AQ5, 6П6С/ & ECC81-RFT & OT Hammond...2 x 6-7 Wts

azazello

Sorry for link.....https://picasaweb.google.com/azazello52 ... 9815226946

azazello · **Posté:** Ven 04 Mar 2011, 22:18

My "pocket" SE with audiophile tubes 6Ф3П /ECL82/ with strong bass and clear sound.
https://picasaweb.google.com/azazello52 ... 3544989442

Mes projets lampe

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