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is "Input" and outside is "Output".next is indicated detail.




If do you would like study more something about an amplifier.
please see "Stagger Ratio"for An Amplifier design.
Not only 300B triode even penthode like KT88
have to adjust C(coupling) and R(leak resistanse)under SPEC of
TUBES.most important thing is" how is sound with your speaker system
and your room where you are always listen faber MUSIC."at least
you need know DF(Damping Factor)of Penthode is very low.like 0.5
but Triode (low mu like a 10 from 3)are around 2-3.Direct heating
Triode (45,2A3,50, 300B ,275,VT52 etc) are useble as a NON NFB
SE Amplifier.but Penthode are not.Penthode need NFB or 2nd Way.
"UL is kind of technic of NFB" and UL get around 6 from 3dB
of NFB into final tube and closely same effect of cathode negative
feed back at output tubes cathode.I always feel good -3dB with
many Valube Amplifier with high effiency speaker(over 90dB/m/w).
and always I asked many person how much did you get DF your
Amplifier D.I.Y? if some one said DF=1 . I said OK bad amplifier
did you built up.Power Amplifier are not power.Power amplifier has
Good DF.push pull get around DF=10 and SE get around 2-3.
An Amplifier SE D.I.Y has good DF at least 2-3.can move yor JBL and if
would like to use SRPP for Drive ,output impedance is very low but gain
is not enough for power tubes so you can caluculate gain for SRPP drive
to set up your power tubes ,please see for some idea more gain of SRPP
click here .ex) ECC83 if use , cathode resistance are around 1k ohm to 2.5k generally
but some time need more output gain.please to try to use value of from 2.5K to 5K ohm.


Note: Russian 6550 and KT88 are almost same cahactor.I think same tube.
if driver can get max 40V rms , can be use any drive amplifier like P-G amplifier by 12AU7
ECC88 etc of one driver.KT88 sound is very similar of good triode amplifier.
but EL156,KT90,KT120 are almost same kind of sound.not get mid high is clear.
KT88 single ended amplifier is just like good triode amplifier sound and good bass.
charactor is just same sound of EL34 but more powerfull.off course depend on good
transformer use.transforemr is at least need 10(20Hz) to 100Khz(80Kz) bandwith.
10 W rms power so need more than 20W capability of power.so KT88 single ended Amplifier
very popular for Audiophiler.KT90 is not same family of sound of KT88.KT90 is
PL509(top plate) Sweep tubes modificated.sound is very tight and dry.for me
not recommended to use audio amplifier.EL156 China is not bad and easily to drive
any kind of drive amplifier ,just a half of 6DJ8,12AU7 enough to drive.
whay can I say,,,,KT88 is the king of valves.looks good ,sound good, easily to drive.
other way Triode Single Ended Amplifier get sound of other world of sound.
Not only power.  

    
DF is very important and output impedance

explane for DF ,please move mouse on the Icon.



Fujii New Tech Amplifier for EL34/KT88 Single Ended Amplifier
Idea from most 2/3 multipul charactor amplifier and 3/2 multipul
charactor of Diode tube.good factor for Penthode SE Amplifier.
Mr Fujii said you can build up one of very low distortion
Penthode SE Amplifier like a push pull effect.what do you think?
Distortion is 1/20 time less than general penthode SE Amplifier.




ProAc 110 with KT88 SE in Spanish
Yamaha NS 300 and Amplifiers


above picture came from,if would like to see!!





Proto Type 6550/KT88 SE Amplifier and Most Latest Model is

Idea of Grounding point in the chassis


Let's me show you some example here
to Click and it's is not only this way to made up good one of amplifier.and very
important things is ground wirering when would like to build up an amplifier.we call It's
"ONE POINT EARTH".(Itten earth).very important for any kind of Amplifiers.any Kind of Audio Amplifier even High End Audio Amplifier like a Jeff Rowland, Sony too.


only links



Mr Claude Paillard F2FO Tubes Manufacture from France

Mr Claude Paillard and his web site. you can see how to make valves
specilly he is doing making Triode on his web site.please see It's
His WEBHere






Turner Audio 6550's 300W rms Australian Amplifier

New Digital Amplifier TDA7491 ST Microelectronics







  Vintage Audio and High End Audio in Chile(JBL Fanatic)


  Audio Spectrum  Analyzer for PC(free ware)


Export Japanese Components like a Tango,Tamura Transformer,etc.




I am doing build up one of small push pull amplifier on Jan 2008 7W rms

Mr Durandal 2A3 Single Ended Amplifier from Germany





I think 2A3/45 SE Amplifier get best sound than 300B SE and KT88 SE
frequency reponse is from 10Hz to 35KHz -3dB by Noguchi PMF-7WS.
Max power is 4.5W rms under 2A3.



next I will be modificate above amplifier to WE 91B type
circuit diagram is next one and driver is EF86 UL connection type.




2A3 Single End Amplifier is better than 300B Single Ended Amplifier ???
driver using 5687 High current heater Miniture valve, double triode medium mew MU 16-18.
FE-12S is new 2008 model of ISO TANGO in Japan for SE Amplifier.max power is
12 W rms. recomend valve are 2A3, EL84, EL34 and 6L6GC etc.this is an universal transformer so
out put impedance are 2.5K, 3.5K, 5K and 7K ohm.frequency response is from 20Hz to
80Khz at 2.5K ohm and from 45Hz to 35Khz at 7Kohm, Max current is 60mA DC,1.6Kg each.



SRPP is very nice clear sound get for 2A3SE.but It's very difficult to get
enough gain when do you play classic.needed other low gain amplifier before SRPP
driver.I like sound of SRPP with ECC83.some one said 6N2P is good.
even 3 stages direct coupling driver with 6922/6DJ8 is good sound and enough to get
much gain when play Classic.Power is around 5W rms at 3% with Sovtek 2A3 and clear
sound.2A3 EH gold is a little bit expensive than 2A3 Sovtek and Sovtek 2A3 sound is much better
than 2A3EH gold.even 2A3C is good sound to get and very clear and powerful.


Driver ECC88 and 6N1P are more clear and not too much bass but sound more musical.
and I am thinking ,going build up next circuit is ...



Perque Drive for SRPP how to work?
I like 2A3 SE with SRPP drive. sound is very clear as you knew.
SRPP is good sound to get but low Gain and not enough to get sound when
listing all type Classic Music.however if use a u(mew)Drive SRPP to get
more gain than SRPP normal.1st time I used u(mew)Drive SRPP for 6550/KT88 SE. gFiltering Hotladiesguide S Hot Ladies Guide %D7%90%D7%9C%D7%A7%D7%98%D7%A8%D7%96 %D7%A4%D7%A8%D7%A7 1 %D7%9C%D7%A6%D7%A4%D7%99%D7%99%D7%94 %D7%99%D7%A9%D7%99%D7%A8%D7%94 %D7%A2%D7%9D %D7%AA%D7%A8%D7%92%D7%95%D7%9D Dates Nl Photos Etsy Spotlight 10 Cheeky Valentines Day Cards Hot Ladies Guide 6550/KT88/EL34 single ended amplifierv Kissing Ebony Hot Ladies Guide Guide vFiltering Hotladiesguide S Hot Ladies Guide %D7%90%D7%9C%D7%A7%D7%98%D7%A8%D7%96 %D7%A4%D7%A8%D7%A7 1 %D7%9C%D7%A6%D7%A4%D7%99%D7%99%D7%94 %D7%99%D7%A9%D7%99%D7%A8%D7%94 %D7%A2%D7%9D %D7%AA%D7%A8%D7%92%D7%95%D7%9D Dates Nl Photos Etsy Spotlight 10 Cheeky Valentines Day Cards Hot Ladies Guide 6550/KT88/EL34 single ended amplifierm Hot Ladies Guide