*  45 and 2A3 Single Ended Amplifier
2A3 Amplifier It is advisable to amend the user to 300 B single amp,
but why do most people refuse that there is no hope that most people will be out of the music less than 4 W less than enough?


PSVANE 2A3 and Kayra 2A3/45 Compatible Single Ended Amplifier

2A3 my first 2A3 single ended amplifier

This is my first 2A3 Single-Ended Amplifier on 1990 ,frequency response is 10Hz to 130 Khz by Tango XE20S(All Tango)

first my 2A3 Single Ended Amplifier 1990

Design by Naoki Watanabe

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ISO Transformers Japan

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RCA 245 Perque Drive 2A3/45 Single


Kayra 2A3 inside of Amplifier,,,coupling capacitor are film capacitor by TOICHI

Dr Joaquin with Horn mono

Show Dr Joaquin from Chile ,mono of 2A3/45 Single Ended Amplifier Mar 2016

RCA 2A3 SET 2003 made by Mizushima

Using RCA 2A3 Single Ended Amplifier on 2003 in Chile made

Mr Westman House Chile 2015

as Yayoi 2A3/45/71A Single Ended Amplifier on JAN 2015 by Mr C Westman

Just say.. Impossible to use with turntable near of Speaker system ,he said remove player other side so far from JBL

when owner(he)would like to use TurnTable or Cram-works for SL1200andCRAN-WORKS

2A3 71A 45 Single EndedAmplifier2015 Chile

Yayoi 2A3/45/71A Single Ended Amplifier on JAN 2015 Chile photo from C Westman

June 2015 with Audio Analog

Mr C Westman's house with Analog 2015 June

2013 ,first Mail from Mr Carlos Westman from Chile

Data: XE20S Tango,71A/45/2A3 Compatible Single Ended Amplifier live in Santiago,Chile
and Tested 71A 0.8W rms with Big Horn

How about use for sound source from Raspberry Pi B+ This is not toy..High End Audio
Raspberry Pi B+


WR2A3 PSVANE Replica of RCA 2A3

Allemande 2A3

You Can use this 2A3/45 Amplifier for at least 95dB/m/w ,many person use 95dB/m/w ~ 104 dB/m/w Speaker(Horn)

This version can be use 45 family ,2A3 family , 71A family and 300B family even can be use 275A China

About 2A3 ,if using Class C Amplifier for RF Transmitter ,will be get around 17 W Power of 7 Mhz with 400V of Plate
Minor-Audio.com (Audiophile A to Z )Good for study in this site

It is said that the sound of the 300B and spits out a plump sound sound of a thick low in general.
I think I think so too, but this also only if you use the high-quality output transformer.
It is common to be said very bright sound of mid-high range was enriched comes out to 2A3. The delight of the music mid-high range not in the 300B to 2A3. I think there is no sound of wide,
low-frequency, such as 300B, but can produce a sound that is similar to the 300B, depending on manufacturer of vacuum tube also is a feature of the 2A3.
Capacity of the power supply also the size of the transformer is also everything is the same as the single amplifier 300B of most,
but not less than half of 300B single amplifier power of 2A3. You can get enough power even at home if you use the speaker of 93dB or more at least if.
And RCA 45 Single Ended Amplifier.
You can enjoy at 1.6 watts you just sound full of low frequency in the sound of RCA45 single in particular 45 single,
but it is said this is also a sound that can be realized by using the speaker with high efficiency.
It is said that the sound of RCA45 and can realize the playback of sound clear mid-high range of very low distortion also unique is not even in 2A3 also 300B.
Of the unfortunate very, is that it is a 1.6W power output is just very small. You must use the speaker with high efficiency or even if the parallel single amplifier,
the nature of the sound will change even in a push-pull amplifier. This trend is also true 2A3. Trend of the sound will vary of course the second harmonic does not come out when you push-pull It is as you know.
There is a sound of single-ended amplifier single-ended amplifier.

XE20S Tango with KR2A3 Single Ended Amplifier on Feb 2014 from ChileEnLarge photo

You Can use this 2A3/45 Amplifier for at least 95dB/m/w ,many person use 95dB/m/w ~ 104 dB/m/w Speaker

KR 2A3

Atacama 45 + Passive Pre by Made Dr Joaquín Iglesias in Chile

Atacama 2014 May

Atacama 2A3/45 Single Ended Amplifier + Passive Pre made by Dr Joaquín Iglesias in Chile

Tango is goes out so Introduce you ! we are can use the other small transformer company,, we call it's HUT Audio Lab CO Japan.they are making just like 3rd party of
ISO Tango Transformer.good termination and electric character is good enough. Hatt Audio Lab transformer list is PDF fileis here.

Hut Audio Lab Transformer

much better character than Tango Transformer and more economic

H808 Hatt Auudio 2014 July

H808 Transformer of Hatt Audio Lab

Hatt Audio Lab HO-808 Audio Transformer equivalent model of XE-20S Tango and U-808

How About Hashimoto(ex Sansui)Transformer

Hashimoto H20-3.5U 2A3

Schematic diagram for 2A3/45 Single Ended Amplifier on May 2014

Note : Using Arizona Cap and Vita Q(Audio Factory)for coupling capacitor and filaments diode are Shottky diode see figure

Arizona capacitor

Using Arizona Cap for Coupling

In general 3 stages Amplifier has much gain so not suitable with digital staff like DAC and modern CD player.because they has much gain too. over 2 V pp is not good for use
any valve amplifier.because sensiblity is almost around 0.5 V p-p to 1 V p-p( peak to peak) even my amplifiers are 500mV peak to peak.off course much better use with some
pad. I think you can buy local audio shop for PA system and make one easy too.please try to make one.L pad is more simple.please see next ..very useful.
one thing ,,, why do not use penthode voltages valves. because pentodo has miller effect so if using for triode driver , can not get good frequency response .if audio
transformer 's response has 10 Hz to 100Khz like XE-20S(FC-20S of New ISO), will be get 10 Hz to 40 Khz max response .this is effect of miller.
but if use triode driver make good frequency response.like 10Hz to 100 Khz.so many amplifier push by triode.must be use triode for driver.

Hashimoto H20-3.5U

Just Testing 2A3/45 Single Ended Amplifier on Apr 2014 Transformer are Hashimoto H20-3.5U


Pad 18dB

18dB L pad

Hashimoto H20-3.5U

2A3/45 Single Ended Amplifier with Hashimoto H-20-3.5U on 11st Apr 2014 from Japan

H20-3.5U is Universal Transformer can be use for 3.5K and 2.5K ohm impedance ,out put impedance are 4 , 8 and 16 ohms.so you can use
2A3,45,71A,KT88 and 300B as single ended amplifier. capability is 20W . from 20 Hz to almost 90Khz ...small NFB will be get 10Hz to 100 Khz 1dB with 2A3 SET.
price is just same as XE20S ISO Tango. so enough to use instead of ISO Tango Transformer. How about ? Sound is good enough. just same kind of sound of XE20S.
2.5K ohms : 13H and 3.5K 17H inductance.

2A3/45 Single Ended Amplifier 2014 Apr

Character is good, 3.5K and 2.5K 20W ,out are 16,8,4 ohms H20-3.5U 3.5K/2.5K


L type Pad 18dB

18 dB 100K impedance Pad ,,easy to build up and very util also you can buy Local Shop

Hashimoto 2A3/45 Single EndedAmplifier

4P1L wired triode Single Ended small Amplifier D.I.Y

4P1L Single Ended Amplifier DiY 25th May 2014

4P1L single ended amplifier 2014 Nov

4P1L Triode / UL Single Ended Amplifier Nov 2014

45/71A Single Ended Amplifier using H20-7U Hashimoto(Sansui)

45/71A Single Ended Amplifier

Fervox 45 and 71A Compatible Single Ended Amplifier ,only you can use 45 and 71A for JBL Horn

Hashimoto 71A/45 Single EndedAmplifier

tubebbs com china

Tubes Data from tubebbs.com

Sound of 2A3 Single Ended Amplifier

K Jarret play piano 2A3 Single Ended Amplifier at home(using fladance mp player) 3.5W

K Jarrett plays piano 2A3 Single Ended Amplifier at home(using fladance mp player) 3.5W

What's New :Sheung Wan 2A3C

K Jarrett plays piano 2A3 Single Ended Amplifier at home(using fladance mp player) 3.5W

What's New : PSVANE 2A3B

K Jarrett plays Piano 2A3 Single Ended Amplifier at home(using fladance mp player) 3.5W

What's New: Sovtec 2A3

Helen M sing song 2A3 Single Ended Amplifier at home(using fladance mp player) 3.5W

What's New: Sheung Wan 2A3C

S Kent sing 71A Single Ended Amplifier at home(using fladance mp player) 0.7W with Noguchi PMF-15WS

Ana Caram sing 71A Single Ended Amplifier at home(using fladance mp player) 0.7 W with Tango XE20S

Micheal Hedges plays guitar 2A3C Single Ended Amplifier at home(using fladance mp player)3.5 W with Tango XE20S

2A3 Single Ended Amplifier 's nominal(Normal Power)how many watts will be get ?

Show you step by step, normally 2A3 RCA type has 3.5 W rms,no more than 3.5 W. many Amplifier Maker said within 4 ~ 6 W rms with 2A3C
but actually does not get these power.either will be get lost charactor of sound of 2A3 and short life time.
2A3 JJ is not 2A3 as you know.2A3 JJ is actally 300B .plate voltage is normally using 290V etc but 2A3 RCA Plate Voltages is 250 V,
Look ! Spec is not corrent of Amplifier maker. prpbably some amplifier 2A3 Class A Single Ended has 5-6 W rms.but at more than 10 % distortion.

Sine wave just look like original sine wave

Wave form 3.5 W rms just start clipping top and down of sine

this wave form is just like max power under 5 % distortion.sound is normal and does not get feel bad.when listen music.

some Amplifier Product said 6W rms but actually this means this kind of waveform ...by 2A3 Class A Single Ended.

Upper side is normal but down side is clipping. they said this one is 5-6 W rms of Nominal power.this is not sound for Music.
may be can use for guitar amplifier but can not use for Music for at home.so please dont have big dream with 2A3 Single Ended Amplifier.
But 2A3 Single Ended Amplifier is good for us.if one's have good speaker system and good ear.3.5 W rms is enough power for small room.
Can enjoy any kind of Music.from Old Classic to Modern Jazz.You can make a good sound field in front of the eye,
depending on a small room and a good speaker system . 90dB/w/m ~ 105dB /w/m of efficiency .Prefer 91dB ~ 96dB .
even I like sound of 300B single ended class A. but 300B does not have same character of 2A3 Single Ended Amplifier.if one's have good
Speaker System I prefer use 45 Single Ended Amplifier.

How about Sound of 2A3 Single Ended Amplifier on 2014 by Youtube

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I like 2A3 and 45, 45 is better than 2A3 and 45,2A3 are better than 300B SE

but both are very small power.if do you have over 92dB speaker system
you can enjoy music in your house.let's me show you picture and skematics
2A3 , 45 single ended Amplifier ever I did built up.2A3 is 3.5W and 45 is 1.6W

Frequency response of Amplifier is depend on Audio Transformer and driver.
if using penthodo for driver does not get good frequeny response. must be use tiode.
and have to use good frquency response transformer.I recommended use ISO Tango and
Amorphous Alloys Tamura Transformer.only can get good frequency response.
ex) 10Hz to 100Khz for Single Ended Amplifier. Tango XE-20S and FE12-S are very good
frequency response.

Point for 2A3/45 Single Ended Amplifier

Frequency Response is depend on

(1) Frequency Response of Audio OUT PUT Tranformer.
(2) Driver Tubes (must be use Triode).because pentodo has miller effect.
so if using pentodo for drived Triode ,would be get high frequency is rolling off rapidly.

(3) Coupling Capacitor.CU-Type film capacitor are good but expensive.
(4) input volume control.
(5) if use Inter Stage Transformer this one too.but generally does not get
good frequency response by Inter Stage Transformer Drive.
at least necesary thinking above. and,
(6) New type of 2A3 of plate voltage is 320V and cathode resistance is 880 ohm
from 1000 ohm much better condition. 330V and 1500 ohm for if using RCA 45.

new type of 2A3 are Sovtec 2A3, China 2A3C by NGG, China 2A3B by NGG,
Golden Dragon 2A3B (premiam),one thing ,not recomendable Shuguang Made under bad QC.
many person said New Type of 2A3 are "Small 300B". 300B is very difficult get more than
7 W rms. and not difficult get around 5 W rms by New Type 2A3.I think better to use
in your house with good effiency speaker system(at least 91dB/m/w).

2A3 JJ is not real 2A3 because disspation is 40W but same way can be use as 2A3 condition.
2A3 JJ is not 2A3 ,Name of 2A3 JJ of 300B is real.

so use same condition of RCA 2A3 much better but

any 2A3 family can get more than 5 W rms by A1+A2 drive.
which is load impedance 2.5K and 3.5K.
if use 2.5K must be use 250V for plate and cathode resistance is 750 Ohm.
if use 3.5K must be use 1K ohm for cathode resistance and plate
voltage is many case using around 275V. using under 15W disspation.
if you think 20W dissipation not problem 320V with 3.5K and 1K ohm of cathode resistance.

I like 2.5K but many person said 3.5K ohm for recent 2A3( 2A3C,2A3B and Sovtec 2A3)
2A3 Sovtec and 2A3 EH are different.sound is very diffierent, and
2A3EH is a little bit higher plate voltage.sound is very tight.
old chinese 2A3 H type are good but bad construction and many chinese 2A3's
using gold grid as you know.sound is good like RCA 2A3.
2A3 are mid and high range sound getting good as you know.sound of 2A3 does not
have 300B and 300B does not have 2A3.
how about 45? 45 sound and if use correct plate impedance transformer ,will
be get much better than both sound of 2A3 and 300B.
mid and high range is very good with good big 5K ohm audio transformer.

New line of 2A3 there are 2A3 's,new chinese 2A3 is 2A3C and 6C4C

RCA 45 Single Ended Amplifier

2A3/45 Compatible Single Ended Amplifier

6C4C is 6B4G, some one said 6C4C(6B4G) is very good sound get and manufucter are
same place of svetlana mfg on 1970.if can you find this 6C4C ,will be get good sound .
EH 2A3 and 2A3C are getting around 5 W rms music power max .2A3JJ is not real 2A3.
just like 300B so 2A3 JJ has sound like 300B and need high voltages than 2A3 typical
RCA type.6B4G base is US octal and 6.3V 1A for filaments voltages. useally 2A3 's
plate voltage is 250V and 60mA but 6B4G is 280 V DC.some one said music power get
a little bit bigger than 2A3.offcourse 2A3EH 's plate disspation is more than 15W.
sylvania 6B4G(W) is replacement of 6B4G but sylvania 6B4W is not direct heating tube
just like 6L6 connected triode. be carefully so triode connection inside of penthode tube.
6C4C is very nice tube.sound is good and better than 2A3 chinese.
I would like to say this is small 300B.easily to get 5W rms.
Bias and Valves

Name of Valve
imp Zp
p-k         / Bias  
250V      / -45
180V     / -15V
275V    /  -56V
300V    /  -60V
250V   /   -55
600V   /  -55
425V   /  -40
1250V     /-80V
400V      /-87V

baronly weekend log file show on my site data if would like to see

Cathode Drive 2A3 Single Ended Amplifier, this circuit can be use as any Valves

XE20S charactor

with XE20S Tango made up very wide range Amplifier 10Hz to 130Khz

2A3 Chinese American said 2A3C, new line of 2A3 has 2A3B type too
Shuguang 2A3C

Small 2A3 Single Amplifier small out put transformer

RCA 45 Single Ended Amplifier

All Tango small 45 single ended amplifier on 1990

Skematic show above typecal 91B type circuit under western electric

6C4C(6B4G)Single Ended Amplifier modificated from KT88 SE

How to modificate 2A3 to 45

in general: plate impedance of 2A3 is 2.5 K ohm , some time use 3.5K ohms.
45 is 5K ohm, some time use 7Kohm and 3.5 K ohms.
2A3 plate voltages is 250V to 260V, 45 is 250V to 270V .generally use 270V.
new type of 2A3 is not 250V, 280V is general.suppose be use 320V.
2.5K Ohms and 8 ohms Speaker can be use as 5 K Ohms if connectes 4 Ohms terminal with
8 Ohms Speaker system. so if do you have 2.5K Ohms and 4 and 8 ohms secondary Audio
Transformer easy to use both way 2A3 and 45 as single ended amplifier.

New Tango 2008 FE-12S with 2A3C Single Ended Amplifier

drive by ECC83 AFG SRPP into 2A3, I like sound of Sovtek 2A3 mono plate valuve
than new type such as 2A3EH and 2A3C.Sovtek old type mono plate sound very clear.
even usr cheap Touei Transformer.

Spec FE-12S Iso Tango

This is curve for ISO Tango FE-12S good for 2A3 Single Ended Amplifier

2A3C SE with ISO Tango FE-12S drived by 6N1P
2A3C 6N1P Single Ended Amplifier

and Skematic diagram is next.driver is 6N1P Sovtek sound very much great.
and very clear .I think better than 300B SE sound.power is around 5W rms.
a half of price of XE20S and some one using 8 ohm speaker ,budget type of ISO New Tango
seems ,FE12S is very similar with XE20S.20Hz to 90khz frequency response.
and 3 stage of amplifier can get good bass and good mid ,even High range.

2A3C + 6N1P drive

finaly I use this one SRPP P-Drive is next.

SRPP Perque Drive

300B and 2A3

Sovtek 2A3 is more cheap than any kind of new 2A3 but sound is very clear
than 2A3EH and 2A3C.feel like minor distortion than other new 2A3.I'm using 3.5K
out inpedance for plate.
Transformer are FE12S ISO Tango 10Hz to 90Khz -3dB with -3dB NFB . 4.5W rms very nice amplifier.
Max power is getting around 5.5W rms.Non NFB get 5.0 W rms and Max 5.8 W rms.

RCA 45 Single Ended Amplifier drive by 6SH7 sylvania

charactor FE-12S

Charactor of FE-12S of ISO Tango

Transformer are Noguchi New type transformer PMF-7WS very small one.skematic is next.

PMF7WS charactor

ISO Tango 2A3/45 SE

2A3/45 single Ended Amplifier on Dic 2009

2A3/45 Single Ended Amplifier 2010

2A3/45 Single Ended Amplifier with ISO Tango XE20S Jan 2010

Emission labs 45

Emission Lab 45 Single Ended Amplifier

Introducing 45 SET on JacMusic for Emission Lab

Dr Joaquin with Mizushima 2A3 single

He(Dr Joaquin in Chile) is using as mono Amplifier for Horn 2011-2012

Using ISO Tango XE20S 2A3/45 Single Ended Amplifier. 1.6W rms for RCA 45
2A3 is around 4 W rms.Max power is 5.6W rms.1.6W with RCA 45 but music power is
feel more than power of 2A3 SE.both very clear sound getting.frequency response
is 10Hz to 100Khz -1dB at 1 W rms when use -3dB NFB.sound is very clear sound
when position of Non NFB. 0.5 mV rms noise when RCA/XLR hook up short plug.
1st amplifier is EF86(triode connection)and driver is 6CG7/6FQ7,can be use 6N1P
too. final valve is 2A3(2A3,2A3B,2A3C,2A3Z) and 45 family.input line are 2 line
input RCA unbalanced and one line from XLR(using Tamura maching transformer inside).
600 ohm when use XLR and 100K ohm RCA.signal parts are using non inductive resistance

Emission Lab 45 with SET 2012

recently he is using flat speakers system with high effiency on Dec 2012

FN1242A with DSD

Emission Lab 45 and his 2A3/45 Single Ended Amplifier with DIY DSD DAC under FN1242A on Mar 2013

2A3 circuit diagram

Schematic diagram 45/2A3 Single Ended Amplifier

EM 300B from 2A3 on 2016 Dic

Modify from 2A3 SET to  ELRog 300B Single Ended Amplifier on Dec 3rd 2016

ELrog ER300B //From 2A3 SET to 300B SET modification

tamura Trans Drive 2A3 SET

Inter Stage Transformer Drive 2A3 SET

TansDrive2A3 SETAmplifier

2A3 SET drived 6BL8(Left),Trans-Drive 2A3 SET(Center),300B SET 6BL8 Drive(Right)
recently I am using Perque Drive for any Single Ended Amplifier drive.Perque Drive is
just same like Mu follower(SRPP) and SRPP.but this one use Triode and Penthode combination
valves like a 6AN8.Perque Drive is invented Mr Tetsu Kimura long time ago.
getting good frequency response and good low than any type of SRPP.

trans-drive 2A3/45

2A3/45 Single Ended Amplifier InterStage Drive on 2010

Sounding is good when using 45 old and getting 3 W rms max power.probably more.
because this amplifier getting soft clip.2A3 is more powerfull sounding. good bass
more powerfull than C coupling Single Ended Amplifier.only transformers cost are
almost USD $ 1800 dollares.detail is 3 of chork transformer and 2 of ISO Tango XE20S
2 of ISO Tango NC20F and Hashimoto(Sansui) Power Transformer PT-160V (220V).


Band width is good than small Inter stage transformer

circuit no5 2A3/45 SET

schematic is above

new circuit 45/2A3 SET

modificated 5687 Driver ,more powerfull circuit

5687 Driver circuit

Transformer Drive by 5687,more powerfull clear sound

New Type of 2A3/45 inter stage transformer drive SET

new style trans drive

new style inter stage transformer drive by 5687 on Oct 2010

45/2A3 SET

5687 Drived Inter Stage Transformer Single Ended Amplifier

45 single ended amplifier

Compatible Amplifier 45

2A3 single ended amplifier

Compatible Amplifier 2A3

View of this Amplifier

new 2A3C Titan Plate

This new 2A3C Guiguang is not same as Shuguang 2A3C

This 2A3C is not same of Shuguang 2A3C, very similar but construction is very different
and very low noise.Keikou($B7K8w(B)(Guiguang Electronics) 2A3C made by Titan Plate.size is just same of shuguang 2A3C.
many Shuguang 2A3C getting noise and many fail. but 2A3C Keiko China is super good valve.
Plate is Titan, sound is very similar of 45 single ended amplifier sound but much power.
this amplifier drived by perche drive.Driver is 6BL8(ECF80).getting good bass , off course
getting good mid and high.very clear and good bass getting from 2A3C single ended amplifier.
I like that's!!!.2A3C by NGG means by "Nanhai Gui Guang". new valve product company in china
detail indicated from here.
Spec is
Ua: 325V (250V)
Ia: 68mA (60mA)
Ug: -43.5V (-45V)
S: 5.2mA/V
Ri: 1.1K ohm
Zl: 2K ohm (2.5Kohm)
Po: 5W (3.5W) Uf: 2.5V
If: 2.5A (1.4A) *() what's meanning ?
Uamax:330V (300V)
Pamax: 20W (15W)

2A3C by NGG

2A3C by NGG

What different between 2A3C and 2A3B . 2A3C is sounding more bright and just will say
feel like new type of valve.very modern type of valve.2A3B seem like to old type
2A3.similuar of RCA 2A3. some time same as old type 2A3.but 2A3C is very different.
I like 2A3C of Guiguang. Shuguang 2A3C sound same as NGG 2A3C ,but not same.
I said before Shuguang 2A3C has only one big problem, physical dameges problem.

but actually, QC is not so good with any 2A3C. problem is noise when turn on main Switc.
both old 2A3C and new 2A3C. 2A3B is recomended but sound is narrow than 2A3C.
if you can get old 2 plate chinese 2A3 good too.NGG 2A3C is most budget good tube in this
moments.chinese tubes are always has problem of QC.2A3C NGG plate using Titan.very
beautifull termination, sound is good and perfect. I would like to say small 300B.te
Let's me show you,Shugyang 2A3C and NGG 2A3C next.

Foshan Nanhai GuiguangElectron Tube Factory Nanhai, Foshan City, Guangxi Liuzhou photoelectron tube tube factory in the original factory set of equipment,
technology, Nanhai District, Foshan City, moved to set up.
As we all know, the original tube factory was established in the Liuzhou early 1960s, has a long history,
strong technical base, and its products once won praise audio enthusiasts.
Due to various reasons, Liuzhou tube factory closed in 2000 and discontinued in 2007 moved to the package of equipment,
Nanhai District, Foshan City, after more than two years, put a lot of manpower,
material, capital, the old equipment was comprehensive maintenance, update, transformation. Especially in

Chinese original explication from NGG site traduced to english by Google on 31st Dic 2011.



NGG 2A3C picture on Dic 2011

EH300B and NGG 2A3C

Left is EH300B and Right is NGG 2A3C

Left is Shunguand and Right is NGG

Shuguang 2A3C(left)and NGG 2A3C(right)

Crisis of 2A3C and 2A3B in China 2012
What's matter with Foshan Nanhai Guiguang NGG are broken down in later of 2011.
for exsample. 2A3C titan plate is very good but could not buy anywhere in Japan.some tube shop said
NGG was broken or lay down.so does not get any more 2A3C and 2A3B of NGG. only avarable Shugyang 2A3C.
and now we can buy only new type of 2A3 but 2A3B.physically very different with 2A3B.
called PSVANE 2A3B ,shown next how is sound ? very small plate.just like RCA 45 constuction.
company of outside of china and MFG is Shugyang .they does not 2A3C yet.
Just my opnion, 2A3C by NGG was super 2A3C ,good construction and sound is very good than any 2A3 budget family
in world wide.this 2A3C by NGG is just like small 300B.wide range and good dinamic range has. but I would like to
say "Valve of Phantom".why Psvane does not make titan coat 2A3C ? why NGG are broken ???

yesterday sent mail chinese tubes dealer :I got a letter from him, they said not avarable anymore
any place in china even Japan.good tubes but discontinue model now.does not get any place.
I think some one(collecter) has a lot of 2A3C NGG and waiting going up price.
this is bad thing than NOS 2A3 by RCA.chinese are ,,what thinkin about ?
Name of company is CHANGSHA HENGYANG ELECTRON CO.,LTD.in China.
construction is same as one of one.same size of plate of 2A3B and 2A3C NGG.
if possible can you(PSVANE) make 45 ,copy of RCA 45.same size of 2A3B.???
if can do ,good news for audiophiler in the world.
2A3B Psvane Shugyang

Psvane Shugyang 2A3B brand new on 2012

Sound is very similar of NGG 2A3B and get good bass and clear mid,high range

quite so nice and fine sound came from small new PSVANE 2A3B by my 2A3 Single Ended Amplifier

Information for Takatsuki TA-300B where can you get from over sea?

TA-300B Tkakatsuki Electric Indust

This 300B is TA-300B by Takatsuki Electric Industry Japan, used to be making valves for
Matsushita Electric Co(Panasonic). original Japanese made of real product in Japan.
how to get TA-300B ?. only one company selling out side of Japan. his name is
A & M Limited and very famouse company as you know A&M Amplifiers.they are representant
of Takatsuki TA-300B in Japan.if would like to get TA-300B and A&M Amplifier please
ask to them please.
But Takatsuki 300B is very similar of arquitect of Chinese 300B family. one thing
sound is good and they has good control of QC (Panasonic).very similar of Goldern Dragon 300b family.

all Takatsuki product

TA-300B Amplifier and TA-300B Valve , TA-274B rectifier valve

by Takatsuki Electric Industry Japan

Takatsuki Electric Industry(only Japanese)

A&M Limited Air Tight Offial Site,Representant of Takatsuki TA-300B

High Fidelity Poland ask to them

Boschmann 2A3 single ended amplfier

Boschmann 2A3 Single Ended Amplifier on 2012 Apl--up date version 2014

Just show you,,inside but I do not like show inside,, this is Test Amplifier

Sing Song Helen M by 2A3C with Tango XE20

2012 April 2A3C/BSingle Ended AmplifierD.I.Y using Metal film resistance

EL3N single ended amplifier


EL3N wired triode Single Ended Amplifier circuit

2A3 300B Compatible SET

2A3 and 300B Compatible Digital Input Single Ended Amplifier

this amplifier is just start build up on 25th June 2011

2A3 300B compatible

schematic diagram of 2A3-300B Single Ended Amplifier SPDIF input

Kaneta DAC

Digital input line circuit for 300B/2A3 SET enlarge
Driver for Kaneta DAC isSchematic diagram for KanetaDAC
2A3/45 single ended amplifier oct 2011

2A3/45 Single Ended Amplifier Oct 2011

2A3/45 single ended amplifier Feb 2012

2A3/45/71A Single Ended Amplifier on 2012,ISO Tango XE-20S

2A3/45 single ended amplfier kayra

2A3/45/71A Compatible Single Ended Amplifier with Tango XE-20S on 2012 Feb

Kayra 2A3/45/71A Single Ended Amplifier 2012

Testing 2A3/45/71A Compatible Single Ended Amplfier on 16th Feb 2012

As 71A Single Ended Amplifier

As 71A Single Ended Amplifier

2A3 Single Ended Amplifier on June 2012 in Turkey

45 71A 2A3

2A3/45/71A Kayra Compatible Single Ended Amplifier (Custum Made Amplifier)

Mr S Visiedo Amplifier

This Amplifier is one of copy of Kayra 2A3 Single Ended Amplifier on 2013 from Italy

Many Amplifiers schematics Leserbriefe und L...... Introduce Many Amplifiers in world wide

2A3/45 CompatibleSingle Ended AmplifierD.I.Y on Aug 2011

(Under Construction)2A3/300B Digital input Compatible Single Ended AmplifierD.I.Y on 2011

EL3N triode wired connection Single Ended Amplifiereuropian sound on May 2011

High End Audioin ChileD.I.Y Site

NC20F Transformer Drived by 5687 2A3/452 stages C-coupleDriver update Ver on 2010

NC20F Transformer Drived 2A3/45Single EndedAmplifier on 2010

The Klipsch forums talking about 300B SE VS 2A3 SE go to clickhere

My Main Amplifier 300BJames JS 6123HS WE300B SEhere to GO!!

New ISO Tango XE20S2A3/45 SE Tango XE20SSingle Ended Amplifier

DIY Suppoted LinkBy ATTITUBE

2A3C paralle SingleEnded AmplifierBy KT-Electronics Co Japan

6B4G Single Ended AmplifierBy Mr Tetsu Kimura(Mr Perche)

Radio Engneer 90's schemacticDiagram

Softon English pagenew transformer maker using R-Core

Softon New technic High EndAudio Amplifier

Mr N.Watanabe triode AmplifiersFiles by Zip,801,CX350,300B,211

SUN Audio TriodeCircuit archive from Mr Uchida

Mr T Kimura 71A solid state drivecircuit archive

SARRIS /Handmade audio tube amplifiers, DIY loudspeakersand Monolith Magnetics

2A3/300B compatible single ended amplifier 2012

Dr Tim Williams KT88SE to 2A3/4300B Single EndedAmplifier D.I.Y Step by Step

DIY PASSDIY circuit archive from N Pass enthusiast'

Bartola site
DIY Amplifier his new design circuit archive and Cartoons from Bartola by Mr Alejandro Moglia

2A3 Maniac

2A3C Single Ended Amplifier 2012

testing New 2A3/C/B Single Ended Amplifier on Jan 2012

3 Stages for 2A3C Single Ended amplifierfor TEST AmplifierD.I.Y

Link from France and they hold many of schematic diagram world wide and many data for any audio D.I.Y information

2A3 single ended circuit

New circuit for 2A3C/B Single Ended Amplifier on Jan 2012

2A3/45 Single Ended Amplifier

2 stages SRPP 2A3-45 Single Rnded Amplifiers 2011

Emission Lab 45 Mono Block Perque Drive Single End Amplifier Shematic

45 Mono Block SET

45 Mono Block Single Ended Amplifier by Perche Drive

RCA 45 singel ended amplifier

RCA 45 Single Ended Amplifier

2A3C single ended amplifier

2A3C Single Ended Amplifier but sound is Sovtec 2A3 is better

ISO Tango FE 12S using 2A3/45 single ended amplifier.sound is good
even FE-12S is 2/3 of XE-20S size.but sound is very good low range to high range.
non NFB can made good frequency resoponse.20Hz to 80 Khz -2dB at 0.5W rms.
Driver is 6U8 ,Perche SRPP.coupling capacitor are 0.68uF 630V cornell doubler Black Cat.
felts very low distortion sound from low plate voltage condition.
2A3C is good but goig to low range. Sovtec 2A3 is going mid high range.sound so nice
Sovtek 2A3. each other different charactor has.I like sound of Sovtec 2A3 than 2A3C.
be carefull to use any 2A3C has problem of pin's.make some problem with contact.
Call it's Perche Drive

Perche Drive 2A3/45 Single Ended Amplifier Schematic on Oct 2011

2012 245 Single Ended by Mizushima Amplifier

Avantgarde Horn Speaker with Perche Drive 2A3/45 Single Ended Amplifier from south America

Mr Serrano house 2013 Santiago Chile

Avantgarde Horn Speaker with Perque Drive 2A3/45 Single Ended Amplifier 2013 DecLarge Scale

compatible 2A3/300B single ended amplifier

2A3/300B Compatible SE Amplifier(only just plan)

recomended circuit 45/2A3 SET 2012 Feb

Recommended circuit for 45/2A3 Single Ended Amplifier on 2012

300B Single Ended Amplifier 2004

WE300B Single Ended Amplifier on 2004

300B on 2012 March

300B Single Ended Amplifier(Made on 2004) on 2012

PSVANE 300B Single-Ended Amplifier 2016 Apr
Next Page300B Single Ended Amplifier on 2016 going brew one

How about will you replace resistance in your an Amplifier

Do you know ? material of resistor change sound ?
actually we can use 2 type of film resistance for Audio circuit recently.

(A) Carbon film resistance

these are film carbon resistance
Charactor: sound is very clear low to high frequency and feel sound is clear and good
for pre-amplifier or flat amplifier.
famous resistance are "Allen & Bradley carbon solid resistance" "AMRG" "Rikenorm Riken RMG" "AMRS"
"Rikenorm Riken RMA" "Taiyo FTR" "Rikyu RD-25TJ" "Takman REX resistance" etc etc

(B) Metal film resistance

TDO resistance
and this is Metal film resistance RSN1S TDO resistance

Charactor: Sound is good low ranges and good high range . if your amplifier does not get good low(Good Bass).
please try to replace of all resistance of Metal film resistance. You will be get good Bass and high frequency
tone. famous resistance are "KOA metal film MOS1/2C " "Vishay Metal film Z201" "Skelton Fukushima-Furaba"
"TDO, Solist or Takman Metal film" "Vishay MBB0207-50F" "AMRA" "Rikyu RO-25CFK"
"Vishay RN65D" "Takman RLF" "Tokyo Koon denpa RD" "Nikkohm solid resistance RP" "Alfa Electronics FLCX"
"Vishay VSR" "Takman REY" etc etc.

so recently I like sound of "Takman REY" and "Takman RSN1S" to get good bass from
my single ended Amplifiers.Nikkohm RP are good too.
REX and REY resistance Takman

REX Takman Resistance Co Japan

Nikkohm Matal ResistanceNikkohm resistanceuse for High End Audio and RF

so Resistance change sound of your Amplifiers.
probably the carbon resitance are good for pre-amplifier and some parts in power supply circuit.
how about you ? please try to use different resistance into your amplifier D.I.Y

2A3 /45/71A compatible single ended amplifier 2012

2A3/45/71A Compatible Single Ended Amplifier Dic 2012

45 Single Ended Amplifier

45 Single Ended Amplifier on Dec 2012

71A Single Ended Amplifier Dic 2012

71A Single Ended Amplifier on Dec 2012

this is circuit diagram

Schematic diagram is above

2A3/45/71A Single Ended Amplifier in Chile 2013

2A3/45/71A Single Ended Amplifier on 2013

Back side of Amplifier, terminals are both impedance and input line are RCA and DIN

Mr Freddy 1

Mr Freddy 's Auido System on 28th July 2013

Naim with 71A 2013 July

And his audio system with Lowther

complate system

Lowther Speaker and his Audio System on 28th July 2013

New Amplifier Schematic diagram

new one 2013 2A3 SET

Just show you small up date 2A3 Single Ended Amplifier on 2013 Mar

2A3/45/71A Single Ended Amplifier in Chile Mr Carlos Westman sent me pictures on May 2013

Back side of Yayoi Amplifier

Just view from Back side of this amplifier single ended XLR using Tamura TK20

Yayoi 71A 2013

As 71 Single Ended Amplifier 2013


As 245 Single Ended Amplifier 2013 in Chile


Yayoi in Chile,2013

all system Mr C Westman Chile

Mr Westman's house in Chile 2013 May

Some day Dic 2014 in Santiago, Chile --Demo--

Line up

2 Amplifier 2A3 and 45 and Pre of Mizushima in Chile on 2014

Demo in Santiago, Chile

Mr Daniel Adviz set up Demo with his Speaker System Dic 2014 Santiago Chile

demo 2014 Dic

Demo 45/2A3 Single Ended Amplifier on Dic 2014

The other Story of Amplifiers in my room

Valve DAC

Valve DAC 6DJ8 SRPP with 24 bit DAC

DAC with 6DJ8 SRPP line Amplifier

Kaneta DAC Circuit diagram if you would like to see IVC DAC Kaneta

6DJ8 differential with 24 Bit DAC

Differential 6DJ8 line Amplifier with 24bit DAC

DAC with 6DJ8 differential line Amplifier

Yayoi Amplifier this amplifier is 2A3/45/71A compatible

2A3/45/71A Single Ended Amplifier this is compatible by switches in Santiago, Chile 2013 May

71A/12A Compatible Single Ended Amplifier just same circuit of any my Amplifiers's so far way from Tango but sound is good

2A3 Single Ended Amplifier 2013

New 71A/12A Single Ended Amplifier

Let's me show you, circuit of 71A/12A Compatible SET by PFM15WS 71A/12A SETAmplifier DIY

71A Single Ended Amplifier Sound on 1st Sep 2013 ,SPl 91dB Speaker System at home

Mr A R 's room

Shishido 2A3 RW Amplifier

This Schematic is from Shishido Files 2A3 Single Ended Amplifier Roftin and White circuit

Nobu Shishido's Files

300B Single Ended Amplifier by Mizushima
300B Single Ended Amplifier DIY on Apr 2016


2A3/45 Single Ended Amplifier

Paturro 2A3/45 SET 2014 May Chile

31st May 2014 in Chile VS with Leben CS-300 XS

HO-808 300B Single Ended Amplifier 2017

300B Single Ended Amplifier HO-808 by Hatt Audio Lab

Vinil Savor if do you insteresting
Vinil Savor by Mr Thomas Mayer

he has very interesting site

in my house by small LAN and Music


Sound getting from LAN(home network) and CDP,DAT and LP player


Sound source are getting from DAT and DAC under DAT, CDplayer. 2A3 Single ended Amplifier has 24bit DAC inside of Amplifier . one of source came from LAN
File server using samba and test server. 4 PC connected each other by LAN. 2 of Server is using old PC low spec.file server using Samba and fireFly for mp3.
firefly can be connect any type of smart-phone.small system but enough to use at home.so I can replay FLAC ,wav any type of format(codec).
if do you have any old PC at corner of your room.please try to use as file server.It's very good idea.it is very economic and does not need to buy new NAS server.
OS are Linux, free OS.even if do you have modern type of PC ,you can use as Music Server lile Vortexbox and Voyage .etc Ubuntu Stereo too

If there is a pc that you no longer use the obsolete in a corner of your room, then this can be used You can make a Music server. It is also relatively easy. It does not introduce in detail here, but please bestowed the life of a second old PC with your memories. Vortexbox ,Voyage MPD, Ubuntu Studio ,Dephile, Audio Phile Linux and
Any Linux distribution but if use Linux and will be use IDE type old PC ,can be use until Fedora core 4,Centos 4 with old kernel Linux.
almost fabrication date is around from 2006 can be install Vortexbox, Voyage MPD and AP linux.if can not install Music Server please try old Linux version.

de JH1 DAS

HO-808 300B Single Ended Amplifier 2017

300B Single Ended Amplifier HO-808 Hutt Audio Lab Japan

Price List of Mizushima Amplifier's

I will build up for you PRICE LIST of AMPLIFIERSmiz

Kanto Sandokai Audiophiler Meetings , please make click next line if do you interesting about Japanese Amplifier builder

Just Let'me introduce you Japanese Amplifier builder meeting at Kanto Area please make click next line

KANTO SANDOKAIAudio Builder Meetings translated by Google Please Watch!!

How to get Japanese TransformerAcoustic Dimension from the Netherlands

If would like to know more ?information or order ?

7th Avenue

last up date 10th Aug 2017 from Sakura Chiba Japan

since 9th July 2008 from Sakura with Linux

Single Ended Amplifier D.I.Y 2008-2017 By JH1DAS ex WB4ACI/CE3

how good sound 2A3 Single Ended Amplifier