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Valve Amplifier is ,depend on quality of audio transformer.
which is better for Valve Amplifier ? Japanese Transformer are best for use.
Tango and Tamura ,and Hashimoto(Sansui) are best. I prefer to use ISO Tango for
reasonble charactor and price.Tamura is very best but many Tamura Transformer are
super expensive.Hashimoto are good too and reasonable price.
I do not recomend use James because quality is not high.even they said ,Japanese
Iron using but charactor is not so good.Inter stage Transformer is Tamura and ISO Tamgo
and Hashimoto. recently many DiYer using Lundahl Transformers for impedance matching
transformer and interstage transformer.




6N1P SRPP with Fluency Wide Band DAC
This Site wrote my poor english and very

Bad ,but this WEB site is not English program site. make sure please
under stand "really what are you would like to KNOW ? " .


Thanks
Lagarto san from Sakura Chiba Japan
if do you have interesting on 2A3 and 45 SE make click next

45,245 and 2A3 Single Ended Amplifier



Full Size of picture,pleasehere to make clickfor 2A3 S.E.T


Easy drive by 2A3/45 Single Ebded Amplifier Dr Joaquin Chile 2010 Apr



2A3/45 SE


New 2A3/45 Compatible SE


KT88 Single Ended Amplifier brand new on Sep 2011


Mr Tim Williams Plan of KT88 Single Ended Amplifier D.I.Y Step by Step from Australia


Sckematic showing next very simple circuit .DF is 2.5 ��depend on NFB
EL 34 got power around 8 W to 9.5 W and KT88 is just like same power. 8.5 W and max power is 10 W.may be 10W power get feel like destortion I am using cheap out put transformer but sound like very great.may be good for Cuerda like a chello.this is UL connection. this time use small size power transformer 320-0-320 and 180mA .so is not enough to get high power of 6550(KT 88).if you are obtain good 20W -30W output transformer for this amplifier. and good high capacity of transformer such as 350-420V DC ,280mA DC. probably you may get more than 15W rms at 6550/KT88 .this time i got 80mA at KT 88 cathode. should be choose 390 ohm ( correct cathode resistanse or fix bias use under negative power supply)
 and plate voltage is around  370 - 420 volts better.meanning around
plate current are more than 105mA .when if you would like to get big power, necesary 2 stage driver.this srpp circuit is not enough to drive high voltages condition.    Power tubes can be use  EL34 , KT88 , 6L6GC instead of 6550.I will say sound of EL 34 Telefunken is beautiful sound
   you can get and EL34 Svetrana too. coupling capacitor are ASC for KT88,
Vita Q for EL34 or any kind of oil capacitor and one thing SE , any SE are around 30%--35%(some time 25%) efficient from max dissipation original tubes. depend on Auido out put Transformar and power supply are good one.many old japanese builder choose 2 time capacity of transformer so if would you like to get some 10W power out put. you need 20W output transformer.It's Class A SE Amplifier.

And let's me tell you about minor distortion of amplifier.we call it's "Cancel of distortion"from driver tube.if driver tube does not have any distortion ,will be get major distortion out put stage if are using single ended Amplifier.it's meanning diver tubes must be made up some distortion for cancelation of distotion ofoutput tube(ex KT88 etc).any voltage tube amplifier has 2/3 zone charactor.so startting position are always get non lineal distortion.what meanning if you are using one of triode amplifier for driver .necesaly to adjust load resistor for minor distortion of OUT PUT stage.please under stand, driver tube is very important. if driver has good charactor does not make good result on output stage minor distortion.so with your ear or connect distortion meter with your amplifier then adjudt value of load resitor of driver. if choose SRPP for driver . It is difficult adjust distortion at driver stage.  


point of how to change sound:
1st decoupling of cathode capacitor are using good Audio Capacitor like a MUSE NICHICON , Black Gate etc. sometime use one of LED(Light Emitting Diode)instead of RC network. please try to use LED decoupling element for 1st stage of cathode .
explane for Distortion ,please move mouse on the Icon.


Circuit is next.


this circuit is not original SRPP.we call it's "u(mew) follower for a little
more Gain than SRPP normal.

Diode are
Kick Back Diode Diode: diode has some effect ,some one call it's "Kick Back diode".protect voltage from your speaker.diode makes cancel voltage from voice coil. please try "connect diode "or "with out diode".with diode makes much power and
good response of low range. and you can hear something more ??.believe it's? if would like to test how
to function please try to use good diode some of over 20A diode is best.



some time say,Kick Back diode called as stopping diode,this diode can be use
any kind of rectifier diode.voice coil is shown above as L1 and this inductance
produce small voltage when speaker cone is moving,just like same kind of SW( Standing Wave)in RF circuit
signal is
going back from voice coil of your speaker system.so sounding and Df are a little
bit down with normal sound.D2 is old technic with RF power circuit.same kind of
Basically Fujii Amplifier technic.kind of D2 is best to use as same valves of Power tube
connected wired diode and get miner distortion than without D2 diode.
Just try !!! connected one diode on screen grid.you can get sound good.



Diode 2: Many peroson believe direct heating Rectifier tube make different sound with tube amplifier.
5V4G and 5Y3 if using , each tube has different charactor ,sound is very different.
if your transformer has filament voltage please try to use Rectifier tube like a 5U4G
if you do not enough voltage for 5AR4 Plate is better for use.274B Golden Dragon is good when
I use the  Rectifier tube for power supply.274B Golden Dragon is sound very nice bass.
even 5V4G too.if you can get easy 274B Western Electric much better but very expensive.
Rectifier tube has 3/2 charactor into your Amplifier.


KT88 Single Ended what kind of OUT PUT Transformer need ?

In generally,KT88 SE 10 W means around 15 W(min)capability of Audio transformer
needed and power transformer is at least 170mA 420V from 360V for UL and Triode
connection or bigger.if would like to get more than 10W rms like a 15Wrms aFiltering Hotladiesguide X Sloppy Nl 1 Hot Ladies Guide 6550/KT88/EL34 single ended amplifierh j Hot Ladies Guide Hot Ladies Guide Tease dFiltering Hotladiesguide X Sloppy Nl 1 Hot Ladies Guide 6550/KT88/EL34 single ended amplifiera q m Hot Ladies Guide Hot