Schemes and printed circuit boards of hybrid lamp preamplifiers. Lamp sound power amplifier. Single Lamp Sound Power Amplifier

In the article I tried to convey some experience in building a universal pre-amplifier on the lamps.
Why on lamps?
Because this design initially assumed joint work As part of a lamp audio complex, which in addition to it should enter two lamp monoblock (one-stroke, 6E5P + GU-50).
Monoblocks are not yet ready yet, but when conducting tests, a similar integral stereoysylter has been used, which has shown quite good results.
Ultimately, everything resumes in the acoustic systems. The higher their quality, the less need to interfere in the sound path.
Well-tuned and properly made amplifier (not necessarily lamp), together with good acoustics, does not require the use of various kinds of "improvements" and "optimizers" (IMHO). This is ideal.
Well, what to do with our small-sized rooms, limited financial resources (most, I think), when I still want to not just listen to your favorite music, but also to get a certain dose of adrenaline and feel driving?

When my good friend, a wonderful athlete, Meloman and Lobby asked him to build a preamplifier for a home stereocomplex, then the TK (technical task, you understand) sounded as follows:
-The required lamp;
-toba was a thin comment, but in moderation;
-The CBC and HF could be twisted "in full";
-It to start at least 4 sources of signal on it;
-tob adjust the volume separately through the channels;
-The it was possible to "play" the inter-block cable from the device to Umzch;
-Well so that the design "brick" (such, you understand, computer high-tech), well, the lamps hide, and then the circle and so dust is full.
These are the source parameters. Spin, Shura, twist! : Dance:

After analyzing the situation, it was concluded that not all output cascades of the sources of the signal, even with a low output resistance, are able to work on a rather complex complex load, which is a passive bridge controller of the Baxandala timbre, especially those that have originally small current rest, and possibly low load capacity. For the sake of fair to say that the ratings of the resistors variables were reduced to 100K (by original scheme Mai - 200 ... 220k), simply because they were available.
So, we need a buffer cascade, with good load capacity, low output by concoption, a rest current of at least 8-10 mA, which has a good impulse characteristic and low harmonic distortions. Lamp take the same as in the source scheme, 6N23P. Despite a large number of Disputes around its use in audio engineering, I believe that its use is quite justified in many practical cases, including this specifically.
We do not save on the lamps, given it to the cheapness and availability, at the entrance we will put the White repeater, on one lamp to the input of each channel, the output is a voltage amplifier, which is three double trigger 6N23P, inexpensive and angry.
Why is the White Repeater? ,- you ask. I will explain this selection like this:
-In the difference from the conventional cathode repeater with the transmission coefficient of about 0.7 ... 0.8, here we already have 0.96 and the ability to obtain a general coefficient of transmission about 1.0 (attenuation in the passive RT compensates for the output Cascade of UN);
- the invoice for the presence of a positive OS in the White repeater, we have a reduced output resistance compared with a simple cathode repeater;
- Print "optimized" value of the positive OS get a small harmonic coefficient and "live" natural sound.
Again, we do not come up with anything new, everything has long been invented and optimized by the well-known audio-guru, such as John Brucki and its associates, repeating repeatedly this design.

This volume control on the resistor with one tap is decided to put on the input after the switch. In fact, the load is also not sugar, it is necessary to check how it will behave after everything already on the tested sources of the signal. It turned out that it is quite decent, so we finish the maketting, draw the scheme -

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In principle, I think that the scheme itself does not need a special commentary. I want to note that the Watte repeater is capable of working on a very low-voltage load, which, for example, headphones with resistance of 30 ohms and even less. And the Baxandal's passive rabbelt itself is designed for the program, courtesy of the Moskatov Evgeny Anatolyevich. The program is very convenient and functional, easy to use and allows you to get a quick result in calculating the values \u200b\u200bof resistors and capacitors based on the available radio amateurs available.
Finishing with the diagram of the preamp itself, it is mentioned that standing at the exit classic UNN on the same 6N23P has a rest current of about 10 mA, the output resistance of about 2.5 com and allows persistent experimenters and fans not only to twist different handles, but also to fit under the desired sound " The cherished "component of the audio color, having fun with various interblock cables.

Used power transformer TAN-1 127 / 220-50. Anode voltage is obtained by doubling and no characteristic features has no.
The voltage is stabilized, the germs and chains of the indication of the signal turned on, as well as the inclusion delay circuit high voltage (approximately 40 sec.), assembled on an adjustable stabilion SR1, transistor T2, RL1 relay (RES-48 Passport PC 4.590.204, 6 volts, 42 ohms) and at the time of R5C9. For normal operation of the delay scheme, C9 condenser should be with a small leakage current, here it is made up of two, parallel tantalum electrolytes are still of Soviet production. Diode D13 is discharge, allows you to quickly restore the performance of the delay scheme after power off.
The input selector switch can be used almost any, well, for example, a gallery. It does not affect the passage of the beep, but only commutes the corresponding reels of the germs and the inclusion circuit of the selected source. At my hand, I turned out to be some kind of 2-section import gallert, on the 5th positions, because The number of inputs is four, then the 5th pairs of contacts are not used. Indicator LEDs are chosen blue, with a diameter of 3 mm and fit well into the "interior". In their place there can be almost any LEDs, including incandescent bulbs, - who likes what.
Instead of the usually used method of supplying a "raising" potential into a circuit of lamps from a resistive voltage divider (to protect against breakdown of the heat-cathode and removal of the background), a frequently used method of compounding the flow tire after a stabilizer to the ground is applied here, through a high-voltage C11 capacitor.
The power transformer winding is unomotted accordingly to obtain the desired voltages and currents. At standard TAN-1, two slot windings of 6.3 volts are connected in parallel (which is somewhat little, but what can be done), to obtain a working voltage (6.1 c) transistor (CT819) with low voltage Saturation Collector-Emitter and Ceffectant in the current H21E current about 80. On the board it is set to a small radiator, under which the mounting holes are provided.

installed vertically on 2 10 mm racks -

from the back of the front panel:

Variable resistors themselves have a design under print mount -

They are installed on one side of the printed circuit board, all other elements are on the other.
Switching board with Herracon:

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it is placed on the rear wall, near the input RCA connectors, also on 2-10 mm racks used to attach printed circuit boards.
The board is bilateral, on the one hand, the printed tracks - on the other - the screen with holes are broken under the legs.
Herkons themselves - with two groups of contacts, Chinese origin (where so without them),
as already mentioned the type TRR-2A-05-D-00 in the DIP case.
Silicon low-power diodes, quenching self-induction, are attached to soldering directly to the relevant legs of the German. Both boards are closed on top of the screen also made of foil fiberglass. All of them are connected to the zero bus.
The power supply is also assembled on the printed circuit board.

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installed vertically on the middle shelf using an aluminum corner, the power transformer TAN-1 127 / 220-50 is mounted under it. The standard power survey with the fuse inside is installed at the bottom of the rear wall. The lamps themselves are also placed on the middle shelf and the entire "strapping" corresponding to them is mounted by volumetric installation on tube panels and auxiliary mounting petals placed near them. Compounds of the anode nutrition and grooves of lamps are made by twisted copper pairs of single-core wires of the 5th category with a diameter of 0.53 mm, which are paved computer networks. Their length should be minimal, according to the resulting constructive. Shielded cable connecting the output of the switch with the input of the volume controller - high Quality Furutech brands. Connection of the WG signaling circuits and RT from printed circuit boards to the input lamps are made by shielded wires used to install Clarion's audio equipment. Their length should also be as minimal.

All insides are visible in the photo:

Special comments, I think it is not necessary. Zero lived is made of 1.5 mm copper wire and connected to the housing at one point on the rear wall of the block. Capacitors of the Filter Filter C3, C4, C13 and C14 are mounted directly on the petals of mounting pads near the lamps.
All controls are displayed outside, at the bottom - the power switch, slightly above - the 4-position gallery switch to control the switching germs and the indicator of the input selector, 4th blue indicator LEDs, then separate volume controls and LD regulators and RF.
The design does not contain any super audiophile parts, all resistors - such as MLT, calculated on the appropriate power, capacitors - film, types K73-9, K73-11, K73-17, also on the corresponding voltages. Electrolytes manufactured Taiwan, similar to our K50-35 to 400 V voltage.
Transistors in the power supply can be used almost any, suitable by parameters specified in the diagram, the choice of them is not critical. Diodes in anodic diet are any Fast Fasts at 600 V and current of at least 1 A, and in the gas rectifier - you can apply any diode assembly on the current of at least 3 A and the voltage of 50 V. Throttle at 0.5 mp - from the old German phone, you can put any other or replace it with a resistor of the value in a hundred ohm (1 watt).
The power transformer TAN-1 was also chosen because it turned out to be in the old stoves. It is fixed on the middle shelf through the rubber rug and works quietly, without a buzz.
To eliminate unnecessary vibrations and microphone effect, four rubber legs from an old phone are glued on the bottom of the block with a bilateral automobile tape 3m brand.

For self-task-lovers, skillful hands of masters and professionals who have the necessary park of machines, bring drawings of the elements of the body design. Maybe someone will come in handy.
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For more than 10 years, our magazine exists only to my funds.

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People who love good musicProbably know about the Hi-End tube amplifier. It can be done independently if you know how to use the soldering iron and have some knowledge of working with radio engineering.

Unique apparatus

Hi-End lamp amplifiers - this is a special class household appliances. What is it connected with? First, they have a rather interesting design and architecture. In this model, a person can see everything he needs. It makes the device truly unique. Secondly, the characteristics of the Hi-end lamp amplifier differ from alternative modelswhich use the difference between Hi-End in that during installation used minimal amount details. Also, appreciating the sound of this unit, people are more trusted by their ears than dimensions of nonlinear distortion and oscilloscope.

Selection of schemes for assembly

The preliminary amplifier is quite easy to assemble. For him, you can choose any suitable scheme and start an assembly. Another case is the output cascade, that is, power amplifier. With him, as a rule, arises many various questions. The output stage has several types of assembly and modes of operation.

The first type is a one-dimex model that is considered a standard cascade. When working in "A" mode, it has small nonlinear distortion, but, unfortunately, has a rather bad efficiency. It should also be noted the average output power. If you need to completely voice quite a large room, you will need to use a two-stroke power amplifier. This model can operate in "AB" mode.

In the one-stroke scheme for good operation, the device is enough just two parts: power amplifier and pre-amplifier. In the two-stroke model, a phase convertex amplifier or driver is already used.

Of course, for two types of output cascade, to comfortably work with, it is necessary to agree on high interelectrode resistance and low resistance of the device itself. This can be done using a transformer.

If you are a connoisseur of the "lamp" sound, then it should be understood that it is necessary to use a rectifier that is produced on the keenotron to achieve such sound. This cannot use semiconductor parts.

Designing lamp amplifier Hi-End, you can not apply complex schemes. If you need to voice a sufficiently small room, you can apply a simple one-stroke design that it is easier to make and configure.

HI-END tube amplifier do it yourself

Before starting the installation, it is necessary to deal with some rules for assembling this kind of instruments. We will need to apply the basic principle of installation of lamp devices - minimizing fasteners. What does it mean? You will need to abandon the mounting wires. Of course, this is not everywhere to do, but their quantity must be minimized.

Hi-End applies mounting petals and planks. They are used in the form of additional points. Such an assembly is called mounted. You will also need to disperse resistors and capacitors that are on the lamp panels. It is extremely recommended to use printed circuit boards And collect conductors so that there are parallel lines. So the assembly will look chaotic.

Elimination

Later you need to eliminate the low-frequency background, if, of course, it is present. Also important item is the choice of grounding point. In this case, one of the options can be applied:

• Connection type - a star at which all "earthy" conductors are connected in one point.
• The second method is a thick copper tire laying. It is necessary to disperse the corresponding elements.

In general, it is better to find a grounding point yourself. This can be done by determining the level of low-frequency background for rumors. To do this, you need to gradually close all the mesh lamps that are located on the ground. If when the subsequent contact is closed, the low-frequency background level is reduced, then you have found a suitable lamp. To achieve the desired result, it is necessary to experimentally eliminate unwanted frequencies. You also need to apply the following measures to improve the quality of your assembly:

• To make the chain of the radiolmp, you need to apply the twisted wire.
• The lamps that are used in the pre-amplifier must be closed with grounded caps.
• Also ground is needed housings from variable resistors.

If you want to feed the intensity of the pre-amplifier lamps, you can apply a constant current. Unfortunately, it requires connecting an additional block. The rectifier will violate the HI-END lamp amplifier standards, as this is a semiconductor device that we will not use.

Transformers

Another important moment - The use of various transformers. As a rule, force and weekends are used, which must be connected perpendicularly. So you can reduce the level of low-frequency background. Transformers should be placed in grounded coves. It must be remembered that each transformer cores should also be grounded. No need to apply when you install the devices so as not to appear additional problems. Of course, these are not all features related to installation. There are quite a lot of them, and everyone will not consider. When installing a HI-END (lamp amplifier), you cannot use new element bases. They are now used to connect transistors and integrated circuits. But in our case they will not fit.

Resistors

HI-END high-quality tube amplifier is a retreat. Of course, the details for its assembly must be appropriate. Instead of a resistor, a carbon and wire element can be used. If you do not regret the funds for the development of this device, precision resistors should be applied, which are quite expensive. Otherwise, the MLT model is applicable. This is a pretty good element, as evidenced by feedback.

Hi-End lamp amplifiers are also applicable with sun resistors. They were made about 65 years ago. It is quite simple to find such an element, just just stroll through the Radiorenka. If you use a resistor with a power of more than 4 watts, you need to choose wire enameled elements.

Condencators

In installing a lamp amplifier should be used different types capacitors for the system itself and power supply. They are usually used to adjust the tone. If you want to get high-quality and natural sound, you should apply a separator capacitor. In this case, a small leakage current appears, which allows you to change the operating point of the lamp.

This type of capacitors is connected to the anode chain at which a large voltage flows. It is necessary to connect the capacitor that supports the voltage more than 350 volts. If you want to apply high-quality elements, you need to use the details from Jensen. They differ from the analogues by the fact that their price exceeds 3,000 rubles, and the price of the highest quality radio elements reaches 10,000 rubles. If you apply domestic elements, it is better to choose between the models K73-16 and K40U-9.

Single amplifier

If you want to apply the one-stroke model, you must first consider its scheme. It includes several components:

• power Supply;
• terminal cascade;
• pre-amplifierwhere you can adjust the timbre.

Assembly

Let's start the assembly from the pre-amplifier. Installation It occurs according to a fairly simple scheme. It is also necessary to provide power adjustment and separator for adjusting the tone. It must be configured to low and high frequencies. To increase the shelf life, you need to apply a multi-band equalizer.

In the laugh of the pre-amplifier, you can see similarities with a common double trigode 6N3P. The item you need can be collected in a similar way, but use the terminal cascade. It is also repeated in the stereo version. Remember that the design should be collected on the circuit board. First, it must be debugged, and then you can install on the chassis. If you are all set correctly, the device must immediately turn on. Next, go to the setting. Anodic voltage value for different types The lamps will be different, so you will need to pick it yourself.

Compound

If you do not want to use a high-quality condenser, you can apply K73-16. It is suitable if the operating voltage is more than 350 volts. But the sound quality will be noticeably worse. Electrolytic capacitors are also suitable for such a tension. You need to connect the C1-65 oscilloscope to the amplifier and submit a signal that will pass from the sound frequency generator. When you initially connect, you need to install the input signal of about 10 mV. If you need to find out the gain factor, you will need to use the output voltage. To choose the average ratio between low and high frequencies, it is necessary to select the capacitance of the condenser.

Photos of the Hi-End tube amplifier you can see below. For this model, 2 lamps with a hot basement were used. A double trigode is connected to the input, which is turned on in parallel. The terminal stage for this model is assembled on the radiation tetrode 6P13S. In this element, a trigger is mounted that allows you to get a good sound.

To configure and check the efficiency of the collected device, you must use the multimeter. If you want to get more accurate values, you should apply a sound oscilloscope generator. When you took the appropriate devices, you can go to the setting. At the L1 cathode, we specify a voltage of about 1.4 volts, it will be done if you use the R3 resistor. The output lamp current must be specified 60 mA. To make the R8 resistor, you must install parallel to a pair of MLT-2 resistors. Other resistors can apply different types. It should be noted a rather important component - the separator capacitor C3. It was not in vain, since this condenser has a strong effect on the sound of the device. Therefore, it is better to use a corporate radio element. Other Elements C5 and C6 - film capacitors. They allow you to increase the quality of the transmission of different frequencies.

The power supply built on Kenotron 5C3S is worth finding. It meets all the rules for constructing the device. Homemade Hi-End Class Power Amplifier will have qualitative soundIf you find this item. Of course, otherwise you should look for an alternative. In this case, you can use 2 diodes.

For the Hi-End tube amplifier, you can use the appropriate transformer that was used in the old tube technique.

Conclusion

To make a Hi-End tube amplifier with your own hands, you must follow successively and neat all the actions. To begin with the power supply with the amplifier. If you correctly configure these devices, you can mount a pre-amplifier. Also, using the appropriate equipment, all items can be checked to prevent the breakdown after the assembly of all elements can begin to design the instrument. For the housing, plywood can come well. To create a standard model, you need to position the radiologists and transformers on top, and the regulators can already be built on the front wall. With the help of them you can enhance the timbre and view the power indicator.

Prehistae:
Building a home audio system, faced difficulties. One of them is my lamp power amplifier when connected to the source "directly" gives a boring, squeezed sound. Without the "tops" and "bottoms", one protruded bottom middle. And kinoshuk gives good, and my music (Black Metal) plays badly.

Obviously, thin administration is required. Purchase the problem, in general, decided, but the sound quality (in general) worsened. The preamplifier went to dust on the mezzanine.

I decided to use in my system instead of the thin-drug debt.
There are Chinese, already collected, for example, on two 6n1p and kenotron:

But I took in Russia, from the site, this set is a lamp dammaker-preamp at a double triode 6n2p-s.

For 4000 rubles I received (all the details are new):

1100 + 1100 rubles - two sets of details for the assembly of two mono channels.
1000 rubles - TAN 15-01, toroidal power Anodic transformer.
130 rubles - power supply board.
270 rubles - choke D15N (50mA, 10GN).
400 rubles - shipment (from Peter to Novosibirsk).

Parcel contents:


Close-up on components of the power supply:


Throttle, and two double trigger 6n2p-s - 1972 and 1976 release - which is strange. Thought, there will be one year. And these differ constructively even on the eyes:


(P.S.: The author wrote that he has all the lamps of 1976. My 1972 was fed to him in a set of an unknown way, and he put it not on purpose. Suggested to listen to so much. Free replacement Lamps did not suggest. For missing radio components did not apologize. In general, the seller no polite words ("Thank you", "Hello", "Goodbye") in the correspondence does not use, probably, on fundamental considerations).

Tarmets of the preamp, two mono channel:


Set of details number 1:


Set of details number 2:


"Manuscript" (a photocopy copy in A4) with handwritten blots, which I could not fully decipher. Just rate the level of execution:


Almost soldered fees (immediately visible differences from source photo On the site - separation capacitors and lamp panels):


The amplifier collected on the layout (I apologize for the quality of photos):




Quality of sound:

Average.

But the temboalk, as it seemed to me, is not quite optimal for high quality acoustic systems. Little "Uzbato", or something.

Adjustment within: ± 8db.
LF: 300 hz.
HF: 3 khz.
Strip: 20-20000Hz. (± 0.3db).
Of books: 0.05%.
OUT: 2V, -Maximum 20V or more.

Because of this, the adjustment occurs in a limited range, which is well audible.

I would like to adjust HF: 100 hz and HF: 10 khz, maybe even wider.
The seller said that the scheme, and suits many.

Suggested at low frequencies to replace C3 capacitors, instead of the initial 15 NF put 10 NF, like Manakov.

At high frequencies, the C1 condenser was proposed for 1 NF (according to the map of Manakov, Matyushin C2) is to change towards the reduction.

Advantages:

Quite cheap.

Simple assembly.

Disadvantages:

You need two monocanal for the stereo option, which increases the inconvenience of adjustment, and twice the number of "twist".

The instruction could be more inactive.

Variable resistors are used the most ordinary, with the characteristic "b", so the timbres are regulated not smoothly, but sharply, jump.

Complete radio components in the set of cheapest.

The set did not have 4 resistors. Radiolamps were not pair.

There are no assembly schemes, so I could not collect it correctly until I did not find an error in the markup inflicted.

It turned out to be a shoe "on the outlet" from behind. It has reverse polarity compared to other pads on the board:

In general, the scheme proposed by Matyushin is less successful than the manakov scheme.

Manakova scheme is much easier, the strengthening is less (which is good), since Matyushin is redundant.

In addition, the Matyushin scheme requires three expensive separation capacitors to the canal, instead of one of Manakov.

P.S.
I decided to make Matyushin rambloblok Manakov from the collector. According to the scheme, we remove the following items:


We get such a type of board:


The most strongly affecting the sound quality of this preamp is the separator capacitor and the C2 condenser in the ramp. I put the oil-oil K40U-2 (0.1MKF 350V) instead of a film WIMA, because I did not find anything more suitable. On C2 you need to install or high-voltage ceramic, or mica. I put SGM-1.

The sound quality compared to the source scheme has increased greatly, but the K40U-2 capacitor begins to sound well only after its "warming up" (at least half an hour). What is caused, do not know, but the fact.

P.P.S.
K40U-2 changed to polypropylene Taiwan:


The sound compared to K40U-2 has changed - on my black metal, the "middle" has become more dynamic and rigid. But at the same time, the sound became less "singer" and "spiritual" on rock ballads, etc.

P.p.p.s.
Lamp 6N2P-EB can be replaced with a lamp of 6N1p-ev without a change in the diagram - just pulled out one and inserted another (as you can see, I also hurt the electrolytes in the anodes with film capacitors 1MKF 250V, did not hear difference, but let them be):


The only difference I heard - 6n1p-EB plays a little quiet. Well, inside they are different in design:


P.p.p.p.s.
As a result of my barbaric, "typ" method, the experiments fell victim to one of the two lamps 6N2p-s. What is interesting, lamp has burned down new, 1976.

Keep for updates.

I plan to buy +12 Add to favourites I liked the review +26 +53 I recently got to my eyes a good English preamp of LEAK VARISLOPE 2 STEREO. I decided to make a photo of it external view and inside - maybe someone will be interested in.

It turns out very pleasant, soft and high-quality without backgrounds and all sorts of distortion. This preamp is no exception.

Now such an technique is very rare, but you can still buy, for example, my friend, he has been given for 25,000 rubles. And this is not the most expensive price of the lamp technique.

Pay attention to the competent and thoughtful installation of parts inside the case - it is necessary to navigate, in the manufacture of a lamp of sound reproducing technology.

LEAK VARISLOPE pre-amplifier is assembled on original lamps released in England. Technical specifications Showing in the photo.

Stereophonic Preamplifier

Tubes: Mullard EF86 (x 4)

This is a preamplifier, that is, a sound from the source comes to it, and will be supplied to the main power amplifier. It is connected, respectively, to LEAK amplifiers, such as Leak Stereo 20, and above. Rear panel with connections and sockets in the photo:

Schematic diagram of the lamp before UNF is shown in the picture - click to enlarge.

There are people who do not see the difference between film and digital photography, and there are people who absolutely not hear the difference between digital and analog sound. Such people are very easy to live, others are constantly engaged in developing and improving, striving for perfection.

Immediately I want to note that if you do not hear the difference in the sound of two different audio systems (or for you, she is not a reason to change something) - Boldly scroll further and in no case go under the cat. Just because you still do not understand anything. And everything else is welcome under the cat where we consider the simplest way worsen digital sound.

So let's go!

I will not retell the principles of work of the radiolmp and explain why they are so widely used not only in expensive reproducing equipment, but first of all are actively used by musicians and in recording studios. Radiolamps love for what unique distortions they contribute to the sound path.

The easiest and most affordable way properly worsen the sound is to use a lamp power preamp. It increases the signal level and adds unique distortion that cannot be obtained any other way. The diagram of lamp amplifiers is quite simple and can be easily found on the Internet. Most importantly, self-assembly Such an amplifier is accuracy and accuracy. You can do easier and buy a ready-made two-channel tube amplifier from China. In general, the Chinese are well done, this device is worth less than 2000 rubles at all is not ashamed to connect even to the audio system of the HI-END class.

One of my acoustic systems is of course easier, but partially done with your own hands. The columns are collected from the components of automotive acoustics, the Pioneer A504R transistor amplifier is used as the main power amplifier in the 90s. And the sound source performs the most ordinary iPhone connected using the Lightning - Jack adapter and the usual interblock cable With RCA connectors. As you know, there is no limit to perfection, so the collected package gradually changes in pursuit of the worse sound.

Included with a lamp preamplifier are lamps 6J1 (on the photo on the left), an analogue of Soviet high-frequency penters 6Z1. The sound with them is of course getting worse, but not enough. This is especially noticeable when listening to the fatal and jazz compositions. For experiments, I bought a few modifications of Soviet radiolmps on Avito: 6Z3P, 6Zh5P and 6Zh38P. Each lamp costs from 100 to 250 rubles, depending on its state. These are usually the lamps of 70-80x releases, completely new and unused.

The greatest effect of the deterioration of sound managed to achieve with the help of high-frequency radiation tets - 6Zh5P. During the operation, the lamp is heated to 65 degrees, and the sound with them is most interesting. But this is true only for certain genres. For example, with electronic music, complete 6J1 sounds better (that is, worse) than Soviet radiol vias. In general, the whole thing is in the personal taste and one cannot argue that these lamps are better, and the other worse.

To cause Battherth in those who have come to the ear in childhood, the Chinese have added two small red LEDs at the base of ports with radiolmpa. This is an exceptionally decorative backlight, because Not all types of lamps have their own visible glow by time of work (for example, 6zh5P will not shine at all, but they warm more than others). But any sofa expert can declare that the lamps in this amplifier are just for beauty :)

As a sound source - the fastest for today and at that time, the most inexpensive iPhone in the SE version, there is such a device now less than 20 thousand rubles. I was lucky that I had a device from Hong Kong with sound. To a little diversify this sound, I purchased a brilliant sound worsenor in the form of an adapter Lightning - Jack MMX62AM / a. Its price is only 600 rubles and I can confidently say that this the best opportunity Change the sound of any audio system with a minimum of attachments. Given that inside this adapter is a DAC, ADC and power amplifier - is generally surprising why he is so cheap.

Chinese radiol vias 6J1 in work.

Once we spoke about the entire audio system, it is possible to mark the inter-block cables. Here everything is also quite simple and depends solely on personal preferences. The evaluation criterion is very simple: I like it or dislike. As an inter-block cable between a previller and the final amplifier, I personally like the blue cable of an unknown manufacturer with simple BELSIS connectors. But the ventilation cable (in the photo on the right) honestly did not like.

Between the sound source and the lamp preamp the reverse picture. Chinese brand cable VENTion worth 350 rubles sounds at least no worse than the German Schulz Kabel worth 550 rubles. In general, you can use even aluminum hangers as wires, if specifically you like the sound (with interference, GGG). But if you really do not hear the difference between the inter-block box for 50 rubles with an endal level of interference and normal acoustic cable - you can only envy you that you have such a light and simple life in your life.

But if you notice the difference in sound when replacing certain components (ranging from wires and ending with speakers), I can safely recommend a similar tube amplifier as the most affordable way to worsen the sound with unique distortions of characteristic only by radiolmepames. Well, or you can try to assemble a lamp preamp with your own hands, if, of course, you have at this time.

I'll go even listen to this spoiled warm lamp sound and drink tea.