71A/12A Compatible Single Ended Amplifier on Aug 2013
Let's me show you, 71A/12A Compatible Single Ended Amplifier on 14th July 2013
Modify 300B Single Ended Amplifier
Above schematic is 300B Single Ended Amplifier less than 10 components replace then get 300B SET
as 12A Single Ended Amplifier 0.2W rms
Back Side ,, RCA un balanced and USD 16bit 48Khz from PC
This time doing brew one of 71A/12A Compatible Single Ended Amplifier,this time start to use third party factory's transformer. Name of Factory is Noguchi Transformer CO Japan
recently they are making finemet audio transformer for valve amplifiers.this time using PMF-15WS Cut Core universal transformer.can be use for 300B,71A,2A3,45 etc.
even can be use for EL34 and KT88 Single Ended Amplifier.but only market is in Japan. Noguchi does not would like to sale out of Japan.but many good original audio transformers.
why I have to use Noguchi Transformer again,,because ISO Tango is broken company so we can not get from them.we have to use Tamura and Hashimoto(Sansui) for High End model.
charactor of PMF-15WS of Charactor and wiring of transformer actually Noguchi Transformer CO does not have one's factory.they order some famous transformer co in Japan.so they makes good transformer for Audio.Trust
only one thing they does not have any dealer out side of Japan.
sound is quite so nice sound ,this small output audio transformer is good and get good result.71A sound is very similar sound of 300B .
how about sound of 12A ? many spec said around 0.2 W rms ,this time I got 0.2 W rms but sound is very good ,much better than as 71A single ended amplifier.
if you can get 7K~10K ohm plate impedance audio transformer much better to use. I tested 91dB speaker with 0.2W 12A single ended amplifier.sound is more clear.
just I can not believe I am getting sound from 0.2 W power amplifier.enough to hear music at home sunday afternoon in small room.
Zenner diode using 3 serise 100V+100+20V = 220V and 0.5W of Diode.driver tubes are 6DJ8 family tubes so you can use E88CC JJ is Best.I recommended use this one.
first stages is EF86 ,please use E80F or EF806 , EF86 Philips etc.71A and 12A are vintage tubes so very difficult to get. please choose good one.
71A/12A Single Ended Amplifier Atsuko play Singing on Sep 2013
71A/12A Single Ended Amplifier Atsuko play Singing on Sep 2013
Small Power Single Ended Amplifier on 2013 by 71A how about don't you think only 0.8W rms Power
Comments from Owner of this Amplifier from Chile, AudioPhiler Mr A R Schweitzer
First conclusion: even if the 12A is a tube that surprises are able to display excellent sound with just 0.2 Watts of power, while trying to claim it distorts a little flat even in Coral 10.
I'll try another day max extensively modifying the feedback. Quickly I went to play with the 71A. It also seems incredible that 0.7 watts of music can fill a room. my living room is not that big but have something 6mx4m com.
The positioning of the instruments is large and forth from the speakers and probably wider than the listening space. The detail of the instruments is excellent, even better than in my 2A3.
The only thing I'm not sure who wins the 2A3 is in the voices, which have slightly less presence (maybe because it will be more balanced and everything sounds better in the 71A?)
I'm really happy with the amp. I have still much to experience.
on 25th Oct 2013:Note from MR Audiophiler from Chile in spanish
Finalmente me atrevi a comparar el Tatic con el Mizushima. Es imcreible la diferencia.
El Tatic ja sido mi pli de referencia por años y realmente el Mizushima hace todo mejor. Lo mas destacable es la claridad el Atzuko.
Es como comparar una foto de celular con la de una Canon 7D . Bueno, tal vez exagero un poco. El Tatic es un excelente amplificador,
pero con sus 0.7 watts, Atzuko lo supera en todo. Realmente lo mas divertivo es que mi opinion de los Coral Flat 10 camvio completamente y no necesitan ni mas agudos ni mas bajos.
Japanese explane 日本語での説明 Atsuko 71A/12A Compatible Single Ended Amplifier
71A/45/2A3 Compatible Single Ended Amplifier Allmande 2013
in Chile ,,,2013 Oct
Name of Miss Atsuko
ここで、これから使って見ようと思う出力トランスは、ハット・オーディオ・ラブの出力トランスです。
さて、これから使って行こうと思います。商品リストを取り寄せると、以下の様になっており、これから製作を予測されるアンプにはハット・オーディオのトランスを使って行こうと思います。リストPDFを載せておきます。
PDF ファイルを載せておきます。
Hatt Audio Lab Transformers just look like 3rd party of Tango but much better than Tango on 2014
Just last one of Tango XE20S 45/71A Compatible Single Ended Amplifier D.I.Y
Only circuit diagram is shown,and many components are using high end model. coupling capacitor are Audio Factory cupper film capacitor ,shizuki film capacitor,
ko-on denpa rotaly switch for impedance change of 16 and 8 ohms. signal line of resistor are AMRG ,ground wire and speaker connection wire from audio transformer are silver wire.
many parts of wiring are using OFC wire. power supply capacitor are using UNICON and Shizuki.power transformer is Noguchi PMC-170MR for 230V and XE20S by Tango.
some of resistance are Kiwame and REX. このアンプはタンゴ最後の新品1ペアのXE20Sで作られたアンプです。 ２０１３年6月上旬に春日無線のお店にワンペアあった在庫品でした。即購入ストックしました。
Schematic Diagram of 45/71A Single Ended Amplifier last product of ISO Tango XE-20S
Last one of XE20S Tango using 45/71A Single Ended Amplifier on Nov 2013///Just Testing Amplifier...
Just Show you,,,front ,back side and up side of this small watter Single Ended Amplifier using last one of Tango XE20S
2A3 / 45 / 71A I'm using JBL at Westman's house. I'm currently living in Canada. I'm an IT-related job. I'm an alpinist
Important is room and speaker system .need over 96dB/m/w speaker systen ,almost using horn and JBL, Altec big speaker system.and one thing love music.
スピーカ次第です。アンプにインピーダンス切り替えタップを設けてマッチングの取れた位置を探します。たった0.7 W位しか出ていませんが、ウエストマンさんのお宅では心よく歌を奏でているのがわかると
思います。部屋の大きさとスピーカなんです。それよりたった0.7ワットと馬鹿にしない気持ちと音に対する愛情なんでしょうか？
このアンプの持ち主は結局は転売したのです。転売で稼ぐ人です。シュバイツアーの末裔ですが、頭の中はケチで見栄ぱりです。この家族はほとんどが見栄っ張りです。シュバイツアーが嘆いていると思います。
結局は0.7Wを鳴らす事が出来なかったのです。こんなに良くなっているでしょう。小さな直熱管を使っている人は多くおりますしウエストマンさんの様に頭の良い人もおります様々です。
ウエストマンさんはこのアンプを107dBのスピーカで鳴らしたのです、これが正解ですが、多くの人は86dBのスピーカで鳴らそうと思っているのが残念です。東南アジアのお客様はいっぱつ、音が小さいとクレームが
あったのです。能率は？と聞くと 高価なスピーカですが84dBのスピーカでした、最低でも91dBのスピーカーを購入して下さいと言ったら理解出来なかった様でした。84dBのスピーカでは音は出ません！
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It depends on the speaker. Provide an impedance switching tap on the amplifier to find a matching position. Only about 0.7 W is out, but when you can see that he is singing comfortably at Mr. Westman's house.
I think. The size of the room and the speakers. Is it just 0.7 watts and a love for sound and a feeling that is not stupid?
The owner of this amp eventually resold it. A person who earns by resale. He is a descendant of the Schweitzer, but his head is stingy and stingy. Most of this family looks great. I think the Schweitzer is lamenting.
In the end, I couldn't play 0.7W. It will be so good. There are many people who use small direct heat pipes, and there are also smart people like Mr. Westman.
Mr. Westman played this amp with a 107dB speaker, which is correct, but it's a shame that many people want to play it with an 86dB speaker. Southeast Asian customers complain that the sound is quiet
There was. How efficient is it? I heard that it was an expensive speaker, but it was an 84dB speaker, and when I asked to buy a speaker with at least 91dB, it seemed that I could not understand it. There is no sound with 84dB speakers!
If would like to know more ?
last up date 28th April 2021 from Yachiyo Chiba Japan
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