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Gold mine of DI¥ audio tubes schematics from Japan

Ex-Moderator
Joined 2011
It's easy enough to miss, as I have done it myself. When I started going through the archive, I too thought the articles were complete, but as it turned out, none of them were! So the whole thing is nothing but a big teaser... although having the schematics still proved to be quite useful, so it's not a total waste of time. :)
 
You can install and use the Google Translate apps on your phone, then save the file from pdf to jpeg, then use the Google Translate camera option to translate all the Japanese words into English

IMG_5321.jpg


Thanks CTF ......wish it was in English!
 
Translate text from photos from English and other languages – Yandex.Translate ocr the image, then you can send the page to their translation page, this is the translated text body all 4 pages sans images

Special sales Special collections 4dc system for all stages of direct connection 803 single. 25W. Monaural power amplifier Seiyatsu soya Susumu Air cooled 5-pole transmission tube (RCA 803) 4dc system with maximum output of 25W all-stage direct connection single-ended " amplifier . Mo. Since it is Naural, I made 2 units for LR channel . In the first stage ,a large increase in width is obtained in the three-pole tube Filco Made 75 for the adoption . The live stage was 807 with three cathode followers . I power supply as a rectifier tube U-19 for delay time, B2 power supply has time lag at 80K . As a countermeasure against heat generation, all vacuum tubes are used. And then dropped the construction . In order to handle the high voltage of 1kV , it is necessary to take measures against the electric shock so that it is suitable for the veteran . For more information, see Every October empty tube audio ・ At the fair'S MJ At the MJ event , the co-founder announced Ann representing, theme in advance It was decided . Now the year is " human output It has become a "single amplifier". There are so many of them that we can't afford them all the time. There is a US place for all fans of the game . The height of popularity This is a great event . The sound from the magazine Because it does not come out, what kind of I'm not sure if it's going to make a sound There are no other options available for you to choose from. If you have any questions , please feel free to contact us . Now . People out in a single amplifier What is power, how much of the output of the body There is no rule of what it is . This is ... I think it's up to you to decide. However, the handwriting is for audio output In the tube , a relatively Manly play You have to be very careful with your credit card details .KT88 and EL156. In the case of single use If the maximum output is the same as the maximum output , the system It is considered to be a large output amplifier in the It has a lot of features . In fact, the output is about 10 ~ 15W If the degree, it is a single amplifier So it's human output. This is an event. So, the production cost was expensive But ...5 feeding tube RCA803 for ADC Made to work in a way, single power - I'm announcing the amplifier. It was a great experience . It would be greatly appreciated if you could join the reading brothers This is a great app . However, this machine is as high as 1kV Because it deals with pressure , A for veterans It can be said that it is a very good amplifier . How many amps? If you don't have experience with it, you can So that we can work on it after we've experienced it. If you have any question, please feel free to contact us1kV is very dangerous. In the insurance . Sometimes it's life threatening. , If you want to try it again, please contact us It is a mandatory condition to do so. 4DC method As for the 4DC system, until now I've been through it for a number of years. Although I think that there are many people. Good opportunity So I will explain the other summary. You can find more information here What is the 4DC system? (See below .Gj) and second grid (below . Divide (G2). Both grids. The method of inputting a signal at the same time And that is . G2 has a lot less sensitivity There is no need to worry . A signal that powers G1, and a reverse phase If you enter the signal, you will be returned. You can find more information here .3-pole connection and UL connection It is the most popular game in the world . Output tube The internal resistance of the low down, the characteristics of each species Although it is a good way to improve You can find more information here . Where G2 is the GJ and phase signal What will happen if a person forces you to do so? From the conclusion, it can be said that the Sutra up to now From the experience it seems to be improved . This would be a feature of the 4DC million formula . However, connecting Gi and G2 directly And, like the 0 bias B-Class output tube It becomes a characteristic , and it moves it in a Class A When it comes to creating a grid , the grid is large And it needs to be shifted to the positive side. You can find more information here . Even if . Personality rating for Igl Even if you use the transmission tube .

And you get a Zener Diode I have tested it since it was installed on my computer . Resistance ・ From the split by the condenser , sound It is a good escape, zenada I don't care about the effects of the ion. So, this machine is very easy to take We use cookies to ensure you get the best experience on our website . Output tube Use if Ig1 exceeds the specified rating You can not . What's more, the receiver , In a state that does not flow basically Ig1 Because it is designed to use , If so, G1 is negative, G2 is positive You will need to leave it .4DC method Is, even if Gi is either positive or negative There are benefits that can be used . Figure 1 shows the 4dc scheme You can find more information here(a) the input signal by the division resistance Dividing the cathode potential and the signal, G1. Enter G2 . In this case . Come in. The power signal is divided by resistance And, G2 is the sensitivity compared with G1 Because of the low, large input signal voltage The first stage has a large gain. You need to use a 5-pole tube. You can find more information here However , the length of this form is Ep - Eg curve in Ip characteristics, etc. It is close to the interval, the rate of decline is expected You can find more information here . Then the time constant will occur, enter To increase the Force sensitivity ,to GJ and G2 Add a capacitor to the connected resistor The signal voltage of G1 is not divided (B) is what made it so . Now. The degree is because the signal is not divided , And the G1 movement has been a big influence The sensitivity is increased, but it is used there The sound quality of the capacitor So that's a big choice. You can find more information here The best part is, the first stage is high 3-pole tube can be used for filling drive This is a great app . (c) is a resistor or capacitor Instead, enter the zener diode It is the one that is best for you . Zener diodes. The response to DC is guaranteed. We can do it , and we can do it again. It's a good way to get rid of them. It can be said that . Now times, with a capacity of 10W at 105V The output tube is RCA803 . Nature Air cooled 5-pole transmission tube with filamé 10V / 5A , Filament power consumption of 50W You will be prompted to enter your username and password . 813 is similar for Beam tubes. So, if 803 is not available , Try experimenting with 813 .20. Years ago, 1994 year 4 In the month issue, 813 4DC scheme So I made it and announced it. , If you take a look at that, you'll see. If you have any question, please feel free to contact us I'm going to go into this issue, but the 803 is five poles. As a feature of the transmission tube, suppressor - Grid modulation (G3 modulation) The major difference from the beam transmitter tube It would be nice if you could do it . This is also the feeling on the G3 How to use it The best part is that you have a lot of money . Look at Figure 2 . This is Yu. The manual of the Nivar tube. It is the one that has been unplugged from .(b) is a supplement

In the basic form of lesser modulation, G1 and GG is pulled to the negative side In G1, also in G3 Put the audio signal, and out the modulation wave This is what we try to do . Also, (a) connects G2 and G3 , Used as tetrode (quadruped) Here's how to do it . (c) is Ep-Ip characteristics .To the G3. It's giving a 40V positive voltage , This is for shoulder characteristics improvements . From this figure, Eg2 up to about 100V If you let me lower it, Eg1 will shift to the positive side The Igi flows therefore You will see that you will be able to play the game . I did. Therefore, the drive needs power So, using the output tube The drive will be required . So, in the same 5-pole tube 2E22 Made a test Ann, where the G3 Check if the connection is the best We tried to do it ( Photo 1). Figure 3 shows the connection We will show you how to do it .(a) does not work There was a part that would determine . (b))

I'm not the only one who worked on this amp. I think that it is. It should be noted , residual noise both channels At the same time, it is only 1.6~2mV .803. Condenses put in the filament of Even if the capacity of the server is increased, the remaining Because the size does not fall low, even low In order to make noise, here's a hint Beth to put a choke It would be a good start . Residual noise of 2mV is 100dB Even if you use the speaker of ,1m The more I get away, the more I'm worried about it. It is not . Waveform observation Photo 13 is 100Hz, photo 14 is 1kHz, photo 15 is 10kHz, that Each form of the wave response indicates the form of the wave response . 100Hz can now shoot twice well I did not do it , but Sag is a little No, low-frequency response You can see that the system is down. The problem is that at 10kHz Not very clean . This is ... That's 46kHz. With beak, response from 20kHz The situation is rapidly falling. We are looking forward to hearing from you . Photo 16 is an open load It is a response waveform . Photo 17, load 83 to 0. 47uF. The capacity when the capacity of the It is a load response waveform . Photo 18 is loaded as 0. 47pF. The net capacity when given only the capacity of It is a load response waveform . The turbulence of the wave form To increase the number of people There is no way to change the input volume If you squeeze it down to half a minute, the worst For more information, see <url> . So, second Resistance on the side - capacitor compensation circuit It will be stable operation by inserting You can find more information here Incidentally, the photograph showing the waveform is the phase Correction before, correction after ringi The ring is getting smaller . Photo 19,20 is the only content . At 1W, the second is the main body , 10W sometimes it only adds another It seems to have gotten worse . Trial listening Listen and immediately notice, out There is a strong energy in the sound coming The best thing about this game is that it is very easy to use . It's simply a fat sound. Not only that . Sound tight. Quality, with the used output transformer I think it is due to 803 . Again. , The height of the transparency, the grid current The Tritons that flow and drive With the DDC used, to the 4DC amplifier It's refreshing. If you like the clear sound quality , once I'm sure it's going to be addictive. You can find more information here . Good extrusion, large scale In spite of the loud sound , up to the detail The sound quality that can be seen is, large out cappuccin The features of the amplifier are well manifested I thought it was a good idea .

Regards james
 

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:) :mail:
 

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Hello. I am building 300B SE from book (very first tube amp).
First stage is 6DL4, fixed.
Building with new ISO transformers.
This is my first tube amp so taking long time.
 

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