2A3/45 European version Single Ended Amplifier 2023
counter started 27th Dec 2022
Bohemia version Europian for 230V version USD $ 4200 dollars
this amplifier are european version is use in Spain . Amplifier they are would like to use 2A3 and 45 single ended amplifier.and 71A.
offcourse use high efficiency speaker sysrtem 8 ohms and over 97dB/m/w speaker and horn at home
famous valve amplifier use FC20S is same as XE20S Tango.very good quality for valve amplifier for audio
貴方もご存知のXE20Sとして有名なオーディオ用トランスですISO Tokyo Japanから販売されている優秀なトランスです
2A3/45 Single Ended Amplifier Europian version on 2023 latest update on 8th May 2023 by kenji
A speaker with an efficiency of 80dB/W (1m) requires 100W of power to get 100dB of loud volume, but a speaker with an efficiency of 100dB/W (1m) requires only 1W.
The mid-high range of 2A3 does not come out with 300B. If you play your favorite speaker with 2A3, this sound will lose to the sound produced by 2A3 even with 300B,
the king of vacuum tubes. And many people use 100dB speakers with less power RCA 45. If you're building an amp using small-capacity tubes,
running them in parallel will make the sound louder, but you'll lose the elegance of a single-ended amp.
The 2A3/45 single amp is an amp loved by many audiophiles for its goodness.
These good sounds only come out with ISO TOKYO's FC20S. FC20S and XE20S are the same product. The same craftsman put his heart into
This is an audio transformer for vacuum tube amplifiers that was created based on experience.
If you place an order during this period, parts will not be collected.
You will end up purchasing expensive parts. Of course
This means that the amplifier cannot be completed for about $3,800.
I feel sad for clients who don't understand that.
It costs about $4,500. If you resell them and get a large amount of money, you will be in big trouble. Resellers bear the risk of reselling. It is your responsibility.
this is USA Version 2A3/45/71A Single Ended Amplifier on 2023
This Amplifier can be use 2A3 45 71A and 300B but 300B is low voltage use so will be get power of just like 2A3 .actually this amplifier for 2A3/45/71A valves.
The power transformer is basically a PMC-170, but the input is 230V 50Hz and the filament voltage is set to 5A so that it can withstand 2A3 2.5A. It will be 4V 5A instead of 6.3V.
I changed from 3A to 5A because the heat around the transformer would be great at 3A. What happens when you use 3A? Rare short may occur. Bohemia has a heat sink, but in the summer, attach a fan around the transformer.
I asked for it, but the owner said he didn't care so much. I think it's a national difference. I will continue to use the LT number 2.5V 3A regulator. It sounds pretty quiet.
In addition, I have made many 2A3 single amps, but most of them are for South American customers, so the single amps I made are 230V or 220V specifications.
95 dB with the combination of ISO transformers that are now a hot topic in this world
Listening to music on more than one speaker. ISO transformers used to be
The ideas of Mr. Otaki and Mr. Suzuki, who were famous as Tango trance, are still alive. Mr. Otaki and Mr. Suzuki are former Tango engineers.
Introducing the Mizushima Single ended amplifier. Although it is an experimental amplifier, Mizushima made it wholeheartedly.
The price is the same as usual.
This includes the EMS fee. 2A3/45 single ended amplifier price is USD $ 4200 /please ask price would you before order.
I am using special order of new power trannsformer used be use 6.3V 3A for 2A3.but this case made high temprature sarface of power transformer
not so good for power transformer condition keep going on.so this time re designed power consumer is slightly higer. 2 of 6.3V are change to 5V x 5A
general transformer sales said would be good ,no heat up problem of sarface of transformer.this transformer are 2 type 230V and 120V use.choose when ordered.
電源トランスは基本的にはPMC-170ですが、入力は230V 50Hzになっている他 2A3 2.5A に耐えられる様にフィラメント電圧を5Aにします。6.3Vではなく5V 5Aになります。
これは急遽 71Aも追加してくれとのことで4.5Vでも構わないと思いましたが5Vにしました。この巻線で2.5Vと５Vを作ります。
過去に苦労した200V前後の電圧はツエナーダイオードで電圧を落としていましたがフレキシブルな思考のトランス屋さんの出現で色々な電圧のトランスを製作してくれるのは吉報です。
このアンプの場合は200Vと290Vを出して貰いました。フィラメントは以下の様になります。
３Aではトランス周辺が高熱となる為に3Aから５Aにしました。３Aで使うとどうなるか？レアショートする可能があります。Bohemiaはヒートシンクを付けていますが夏場は扇風機をトランス周辺に取り付けて
下さいと言いましたが、オーナーさんはそれほど気にしないと言っていました。国民性の違いと思います。これからもLT1674 2.5 ナンバーの2.5V ３Aのレギュレーターを使います。かなり静かな音になります。
尚、多くの２A3シングルアンプを製作しましたが殆どは南米のお客様仕様ですので230V若しくは220V仕様となっているのが私が製作した過去のシングルアンプです。
基本的に４オームスピーカーは使えません半導体アンプなら使えますが真空管アンプでは使う事が出来ませんスピーカーには８オームを使って下さい。若しくはこの趣味を止める。
引っ越しと重なっており、半年の製作期間をいただきました。４オームのお客様は断り、高いと言ったアメリカ人はそのままいなくなりました。この様なお客様は
2A3/45 シングルを見ると71Aや300Bも追加してきますが、頭の中にお金もかかるとか高いアンプとなる事が理解出来てない為に値段を言うと驚きます、そして破断となります。
最初からオーダーする積りはなかったのでしょうか？４オームのお客様も爺さんの形見の４オームのスピーカを使えと言って、４オーム出力で2A3と45を使えと言ってきます。
そしてトランスも指定してきますが、指摘してきたトランスでは45/2A3が使えない事を理解してくれません、適正な負荷を取る事が出来ない以上はそんなアンプは作れないのです。
過去にインドネシアのお客様で86dB/m/wのスピーカしか持っていないお客様で、製品を納入したら全く音が出なかった経験があります。全てTangoで高価な部品を多く使えば小電力でも
音が出ると思っていたのです。そしてDIYのフォーラム推薦の回路を使うことまで指定してきて、全く音が出なかったのです。DIYフォーラムは最悪の経験です。糞ガキどものフォーラムを信じてはいけないと
言うことです。
These kind of amplifier can not use 4 ohm speaker may be 4 ohms speaker can be use for 2A3 but 45 does not work any way 4 ohm spearker must be throw away Garbage
FM24WS New Audio Transformer has 5 Kohm out pur 4 ohms
This is Fine Met Transformer using this one has 4 Ω out put
If use General transformer sales made Finemet transfor for 2A3/45 Single Ended Amplifier's price is USD $ 3800 in cash.
The production period is six months to seven months.
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