.....ampl. "Noir velours" pour mes Sen. HD580. 6N13S & Rare ken.RV200/600 & PCC88 Siemens /Yellow pins/
http://picasaweb.google.bg/azazello52/A ... 0498375714

Hi Azazello

Encore un beau projet que tu as réalisé

Peut tu donner plus de détails , un schéma par exemple

In english if you won't

Bonne journée

http://gilmore2.chem.northwestern.edu/p ... e1_prj.htm
I'm waiting for 6SA7G RCA this month.
There is difference in all R and output cap.
P=10 kohm /I wrote WHY in some my post in another theme/
R1=680 kohm
R2=1,5 kohm
R3=12 kohm
R4=330 ohm
R5=2,4 kohm
R6=3,6 kohm /10kohm II 5,6 kohm - 10 wtts/
R7=22 kohm
C3= 100uF/450 v - ELNA
There isn't C4 - the sound was bad...the voices go back to the scene.
Ua pcc88=90v
Ua 6N13S=205v
Uk 6N13S=124v.
Ia 6N13S=34,444...ma

The Russians call "This is the low watt russian 300B"!! I'm completely agree !!
Today I finished my new 1,5 W try - 4P1L/Russian 4П1Л/ direct 4,2 v heating penthode & 6N3P/HF Russian 6Н3П/.
Rect GZ34, output transf. Hammond 125FSE - 5 k in black box. Caps Black Gate. Rubycon and ELNA Cerafine.
Ia = 36 ma, Ua = 165 v, triode mode! Ther is and transformer for heating 2 x AC 6,3 v.
Unbelievable and amazing sound from my Hornes - Fostex 206E !
I advise You try this exiting tube !!
Very close to my 2A3 - RCA, very clear and fin sound!!
http://picasaweb.google.bg/azazello52/K ... 8243040050
http://www.rw6ase.narod.ru/kompl/lamp/3 ... /4p1l.html
The heater has 3 wires - for 2,1 and 4,2 v. To wires 1 & 3 I put + - 4,2 v, to middle 2 - catnode resistor 240 ohm.
http://picasaweb.google.bg/azazello52/K ... 1168756290
Ua 6N3P = 130 v, Uk 6N3P = 1,7 v.
Ua 4P1L = 165 v, Uk 4P1L = 9,8 v.
Interstage C = 0,22 uf/250 v.
Rect. diodes - 2 x 1N4007
Uaa GZ34 = 230-240 v.

Hello Azazello

Good scheme , but let we know what's the sockets for the 4P1L

In fact i'm not for audiophile components in my amps but yours have less components than many on internet, i like this

Just some things to says , have you try Constant current source for the 6N3P ?, and so forget the bypass cap's

For the power you prefer valve rectifier or hybrid solid state mixed with valve like here , you dont' use only solid state

Normaly i prefer this kind of scheme , i found the sound much faster for my own amp

Have you some measurement of your amp , Power, Bandwith ,Distorsion


Best regards

Hi Totof,
1. The socked for 4P1L is the same lake for UCH21, UBL21.....
2. See my "moto" under my every post.
3. You can use 1,5 v battery in cathode or grid 6N3P.
4. I use usually GZ34, EZ 81,81, RV200/600 for good tubes. If power transf. has
only 1 secondary HV coil, I use hybrid rect - Tube and back connected diodes.
5. I will burn-in the tubes, caps aprox. 2 weeks, and than make measure.
But after fast measure power is less than 1,5 w, this is abs. enough for
my Fostex 206. I measure whit freq.test disc amplitude on output Hammond 125 FSE with load 8 ohm
with current 36 ma in primary coil /cl.A/. There isn't problem with amplitude
between 40-20 000 hz /the manufacturer of Hammond says 100-15000 Hz,
but I'm not agree, in my case there isn't different between 40 - 100 and 15000-20000 Hz!!/ The amplitude decrease for a 8-10 % from 40 to 20 Hz!

Well you would say from 40 to 20000 Hz i think

Good value for the moment , one good BW in this way ( simple SE )

When i spoke about CCS i tell about Some BF256 or BF245 or BD139 with one résistance to drain current , they make the tube more linear, also for the power tube , see my post for scheme

Under the name of Power Zéner you can find a BD139 with a large Heatsink

http://www.audiyofan.org/forum/viewtopi ... 6407#76407

Under the CCS you can find a BF245

http://www.audiyofan.org/forum/viewtopi ... c&start=60

Just for knowledge

Best regards