A powerful single-ended amplifier based on an affordable element base. G811 straight-line triode, in a push-pull tube amplifier Tube LF on a 811 tube

Today:

On this page of your site
I decided to talk about my G-811 tube amplifier
which was made by me in 1998.

For all my practice of working on the air, I have previously manufactured and adjusted various amplifiers using various radio tubes I have, such as GU-50, (2xGu50,4xGU-50), 2x6P45S, GI-7B, GU-74B, GU- 43
All amplifiers worked perfectly, covering all amateur radio bands, and like any product had its minuses and pluses, whether it was purely design flaws (and where without them?), And purely energy ones, requiring their own, certain conditions, depending on the installed radio tube.

Over time, I came to the conclusion that the use of ceramic-metal lamps in amplifiers with a power of up to 500-600 watts is not justified at all, due to the fact that ceramic-metal lamps need power supplies of increased complexity, where it is necessary to use screen voltage stabilization, an anode, to introduce a bunch of automation with by switching on power and cooling sources in series, where sometimes at the output, we still have approximately the same order of output power, and the spread plus or minus 100 watts essentially does not affect anything, but on the whole it significantly complicates the entire design and not only ...

Thus, sorting through all the lamps available at that time for me, I decided to make an amplifier on "glass", which, in terms of its parameters, would be close or similar to one GU-74b lamp, but much simpler and more economical than the latter.

The ready-made case I had from an old GI-7B amplifier was taken as the basis, where 4 G-811 lamps were placed. The box turned out to be quite cramped, which is always a minus in PA, but nevertheless, push the lamps there, -contour, fan and incandescent transformer, I still managed ...)))

The amplifier contains input P-circuits and a tuning capacitance at the input, for ideal matching with a transistor transceiver and on all ranges and provides an SWR between the transceiver and the PA input, not more than 1.2
There is a button to turn on the "PA bypass", and it can also work automatically in FM mode, if there is a carrier with a level of 3-4 W at the input. Built-in three pointer devices, show the OUTPUT level when matching with the load, the degree of matching at the input (small device) and the anode current (full deflection of the needle - 1 A)
A small 110 volt motor from an old turntable is also used, which works absolutely silently and cools the lamps with an air stream.

The amplifier is made according to the classical scheme. I did not consider it necessary to draw a complete amplifier circuit, since in fact, the circuitry of such amplifiers is almost the same and is well known to radio amateurs. Just for clarity, I will give the circuit of the Ameritron amplifier on the 3-G811.

My power supply for the amplifier is made according to the classical scheme and in a separate box, a case from the old Soviet C1-19 oscilloscope and was conceived as a universal UMS power supply unit, where the anode transformer, made on a 2 kW LATRA toroidal ring, is very well located. The anode contains a 1.2mm secondary winding and can deliver a switchable voltage of 300 volts up to 2.2 kilovolts, providing good current, sufficient for a more powerful amplifier. Also in this PSU, a number of additional voltages are issued, such as + 24v, - 100v (with voltage regulation), + 12.8v and + 5v, which are not used in this amplifier.
As filters, 2 oil containers for 6KV / 100 microfarads are used. USM and PSU are connected using two cables. One cable with thick insulation (automobile, high-voltage, candle) through which the ANODE and the second cable are connected, brings the 220v network and a number of low voltages - 22v, + 24v to power relays, circuits, and control lamps.

Main technical characteristics:

Anode current, in the maximum, maximum power mode - 800mA, with anode 1500v
- Anode current, normal operation - 650mA, with anode 1300v
- Anode voltage drop under load, no more than 5 volts.
- Glow, serial lamp supply - 12.8v / 9A
- Power buildup, from 30-65 watts.
- Quiescent current (total, for 4 lamps), no more than 80-120 mA (depending on the anode voltage).
-Output power, at anode 1500v, buildup 40w, 80m-600w; 20m-550w; 10m-450w;
-Ranges -80m-40m-20m-15m-11m-10m

Features of building and setting up an amplifier on the G-811

The second feature is that the G-811 lamp is a triode. The property of this lamp is a VHF boost! As it turned out later, everyone who assembled the amplifier on such lamps, one way or another, faced this problem. This fate has not bypassed me either. What measures did I not take to get rid of this scourge ...

Well, the last. Since I never managed to find ready-made panels for these lamps, I had to make a home-made version, based on 4 lamps at once. As a basis, I used a plate of thick fiberglass, 12 mm thick, in which I had to drill holes for the lamp legs exactly in size. In the leads themselves, pieces of copper tubes are inserted and flared on both sides of the plate. Everything turned out to be quite reliable and during operation, no problems were noticed!

Outcome

Compared to the amplifier on the GU-50, in versions of 3-4 lamps, this amplifier wins in power, almost twice and significantly in terms of power output at 28 MHz. I liked the amplifier so much that over the years I got a triple set of spare, new tubes. In my thoughts, there is a desire to make a miniature amplifier in one case with only 2 G-811 bulbs, with an output power of about 250-300W for field work.

Power supply and amplifier for 4xG-811

The linear amplifier for a category I radio station transmitter is designed for linear amplification of single-sideband, telegraph and AM signals in the ranges of 10 ... when pronouncing a long “a” in front of a microphone) is also 200 watts, while the peak power input can reach 400-500 watts. Amplifier efficiency 65-70% depending on the operating range.

The amplifier uses four G811 lamps connected in parallel according to the OS scheme. The total dissipation power on the anodes is 160 W, so it is possible to carry out quite long sessions of transmitter tuning with an input power of 200 W.

Due to the small output capacitance of the G811 lamp (6 ... 7 pF), several lamps can be switched on in parallel. In this case, the anode current increases in proportion to the number of lamps, which is equivalent to using a lamp with a large anode current pulse at a not very high anode voltage (1000 V). The anode load resistance is small. This, along with the low output capacitance of the G811 lamps, contributes to the high efficiency of the amplifier in the ranges of 10 ... 15m, where it is difficult to create a circuit with a large equivalent resistance and high efficiency.

The similar resistance of the amplifier depends on the number of lamps connected in parallel. With four lamps, it is 75 ohms.

When receiving signals, the amplifier lamps are locked with a voltage of -27 V supplied to the grids through the winding of the K1 antenna relay. The contacts of this relay connect the antenna to the X3 socket, where the receiver input is connected. When transmitting signals, the grids of lamps are connected to the transmitter housing by switch S1 or an external contact (for example, in a transceiver) through socket X5. In this case, relay K1 is activated and connects the antenna to the output of the transmitter. A tuning indicator is connected to the output of the amplifier, the sensitivity of which is regulated by resistor R6.

The inductor L9 in the heating circuit is wound simultaneously with three wires on a ferrite rod with a diameter of 12 mm and a length of 140 mm from the F-600 material. The number of turns is 40. The diameter of the extreme wires of the inductor through which the filament current passes is 1.5 mm, the diameter of the middle wire passing the cathode current is 0.51 mm. The incandescent transformer T1 provides a voltage of 2 X 6.5 V at a current of 8 A. Its overall power is 110 watts. Coils L1 ... L4, wound on resistors RI ... R4 of the MLT-2 type, contain 5 turns of PEV-2 wire with a diameter of 0.62 mm. The anode choke L6 is wound with PELSHO-0.35 wire on a porcelain frame with a diameter of . 20-25 mm and 150 mm high. The number of turns is 150, the 50 turns closest to the anode are wound with a pitch of 0.5 mm. Chokes L7 and L8 of any type.

A P-loop is used at the output of the amplifier. Capacitor C12 must have a gap between the plates of at least 1.2 mm. Capacitor C13 is a built-in unit of variable capacitors from an old-style radio receiver (with a gap between the plates of at least 0.3 mm). The rotating coil L5 is wound with a wire with a diameter of 2 mm and is equipped with a coil counter. Since the output P-circuit has three adjustable elements, in order to correctly tune the amplifier in the range of 80 m, it is necessary to set the maximum capacitance of the capacitor C12 (250 pF); when working on a coaxial feeder and low SWR, the capacitance of the capacitor C1 should also be close to the maximum. The circuit is tuned to resonance by rotating the coil L5, the connection with the load is regulated by the capacitor C13. In the range of 40 m, the capacitance of the capacitor C12 is 120 pF, in the range of 20 m-50 pF, in the range of 15 m it should be close to the minimum, in the range of 10 m it should be minimal.

When mounting the amplifier, the input circuits must be separated from the output circuits by a screen, for example, the input circuits should be placed under the chassis, and the parts of the anode circuit - above the chassis. The conductors of HF circuits should be as straight and short as possible.

A properly assembled amplifier starts working immediately. With self-excitation, the resistance of resistors R1..R4 should be reduced by 1.5-2 times. When amplifying a single-sideband signal, to achieve an anode current envelope of 400 mA at the peak, an excitation power of 25 W is required.

G811 lamps can be replaced with GU50 type lamps in triode switching. To maintain the same input resistance (75 ohms), three GU50 lamps are switched on in parallel. Since the GU50 lamp has a heated cathode, excitation must be applied to the cathode. The middle wire of the filament choke is connected to the cathode.

In a single-ended amplifier on the 811, you can make an amplifier of 15 watts per channel with a band of 20 Hz 80 kHz and a low level of distortion and output impedance< 0.4 Ом. Но это не радиолюбительская работа.

Threat And light bulbs are good, probably with tungsten anodes.

The lamp is funny - a triode with a pentode characteristic,
extreme right, with incredible amplification.
Get ready to work with grid currents (A2): read the theory on interstage trances or cathode followers for buildup.

Schemes at: //www.metaleater.narod.ru/s_se.html

my experiments with this lamp, and with A2 in general,
convinced of the prospects of such a path - the sound is very strong, dense, "meaty".
I took the circuit from RCA as a basis, but remade it into a single-cycle: 6E5P + 2A3 + interstage.

And at first he trained on 6N1P "reinforced SRPP" +
6P7S (in triode) - sound, compared to conventional SRPP,
became “meaty”, the power increased (of course, a slight increase in the gain of the cascade also affected). Professional musicians were delighted to listen (classical).
Among the shortcomings - some confusion on very heavy music (groups like "Throne of Chaos", "Your Shapeless beauty"). In addition, 6N1P-EV worked with serious
exceeding the nominal parameters - they were enough for
six months.

Most experts do not advise contacting, but
I was intrigued by N. Shishido's scheme - if he decided to do it on 811, then for a reason!
Toropkin

>Has anyone done an amp on such a lamp

>how does it sound

>Load resistance

It's up to you.
Anton

At 3: it will not be enough! 10-12 kOhm

the lamp is terribly right at 700 volts at the anode and 0 on the grid, the lamp is locked. starts to open at + 20-35 volts on the grid. I do not remember exactly.
But probably at 3000 on the anode it behaves differently.

Used in telegraph transmitters in class C.

In sound, her project will be at the level of hm 70 at a price for power is weaker.

> > >I had always heard that the Svetlana 811A"s were the most rugged of them

> > Rumor has it that Svetlana is dropping production of the 811A due to low

> > sales, Charles.

> > - Rich..., 805.386.3734, www.vcnet.com/measures.

Charles, I wouldn't be surprised if it's Svetlana. Ameritron uses
811s" in both of there 811 amps. The only other 811 amp that I know of
is made by Ten-Tec and I "m not quite sure what tube they use. Cetron
BTW, also makes a good 811, but Svetlana is probably the best, high
gain, good fit and finish. Quality workmanship and tolerances. 73"s de
Phil W2GE

Svetlana also.......in the Ten-Tec Model 411 Centaur.

73 de Mike, W9WIS

I'm here again with the stupid idea of \u200b\u200bthe first (in the corrector) to put the G811 with a bias of -3V and anode 1300-140 0V. efforts to develop such a cascade.
And the sound of a light bulb without grid currents is simply wonderful!
Rezvoy

I would say for all such direct filaments with a tungsten cathode
Vasyanin

What are our realities? We take the 811th Marshall, with ribbed anodes under the horizontal, 100 dollars a matched square, and enjoy life ...
KAA

Why “at least”?.. An ideal (or close to it) current distribution in a triode, when the electric field lines inside the electrode system are most rectilinear and the input characteristic is as close as possible to a straight line, is in principle achievable only in the mode with grid currents. ..
KAA

I tried this scheme (I took it out of my head; just in case, I don’t claim authorship):
Two sources. The first is 190v, better stabilized. An 800 V, ordinary, is successively attached to it. So, only a kilovolt. From the plus of a large source down: wire, primary output trance, anode 811th. The 811th cathode (through an artificial middle point) is connected to the 6P9 anode. Grid 811 is connected to a source of + 190V, the 2nd grid 6P9 sits there.
1st grid 6P9 at the input, in the RC cathode. R is chosen so that the current through both lamps (and they are connected in series) is 40-45 ma. At the anode 6P9, about 200V is obtained.
That's the whole scheme. Sensitivity 1 ... 1.5v, depending on the specimens. 5-6 watts is easy, with 1-2% distortion. A very favorable spectrum (2-3 harmonics and, perhaps, everything). With a class 34 lamp, the measurements are better, but the sensitivity is very low (the high source here should be 600 volts, the current is under 70 mA). The sound is quite decent (obviously better than the 811 fed by the cathode). Plus schemes - extreme simplicity. Minus - the need for a good output trance with a reduction of 8-10 kOhm (the random copy I had played, strictly speaking, more than the middle). And one more minus is a very large "plus" on the anode sticking up. Scary...
Evlampy

Message from Alexey Shalin

> But there is also such a moment: a non-sprayed getter with its “apparent absence” often

>cheats beginners and they reject perfectly good lamps

I agree, the G-811 has a non-sprayable getter, you can immediately see a ring on the anode. But it needs to be known.
shi

I agree with Evgeny about 572\811. Indeed, after (according to my observations) 600 ... 650V they give a somewhat simplified sound, which, in general, has its own physical justification - the overall dimensions of the anode and the geometry of the electrode system are such that edge effects at a grid-anode field strength above 1.5...2MV/m are strong enough and lead to the formation of "virtual" triodes with high permeability from the bottom and top of the anode. In GM70, the interelectrode distances are larger and similar effects take place at much higher voltages. From this point of view, 350...400V for 811/572 approximately correspond to 1.2...1.5kV for GM70.
Lynx

One time ago I listened to CE on 811, the mode is such that it does not climb out of positive biases on the grid at all, the buildup of the pentode through a powerful (on 6L6) cathode follower. Great, fast, detailed sound! With all my prejudice against both 811 and A2, and against a lot of things in this device! But - the ears vote "for"!
HRYUN

S. Bunin, L. Yaylenko
"Handbook of the radio amateur-shortwave"
Linear amplifier on the G-811

The linear amplifier for a radio station of the 1st category is designed for linear amplification of single-sideband, telegraph and AM signals in the ranges of 10 ... 80 m. When amplifying telegraph and single-sideband signals, the average input power is 200 W, while the peak power can reach 500 W.

Amplifier efficiency 65-70% depending on the operating range.

The amplifier uses four G811 lamps connected in parallel according to a common grid scheme. The total power dissipation on the anodes is 160 W, so it is possible to carry out quite long sessions of tuning the transmitter with an input power of 200 W. Due to the small output capacitance of the G811 lamp (6 ... 7pF), several lamps can be switched on in parallel. In this case, the anode current increases in proportion to the number of lamps, which is equivalent to using a lamp with a large anode current pulse at a not very high anode voltage (1000 V).

The anode load resistance is small. The input impedance of the amplifier depends on the number of lamps connected in parallel. With four lamps, it is equal to 75 0m.

When receiving, the amplifier lamps are locked with a voltage of -27 V supplied to the grids through the winding of the antenna relay K 1. The contacts of this relay connect the antenna to the X3 socket, where the receiver input is connected. When transmitting, the grids of lamps are connected to the transmitter housing by switch S1 or an external contact (for example, in a transceiver) through socket X5. In this case, relay K1 is activated and connects the antenna to the output of the transmitter. A tuning indicator is connected to the output of the amplifier, the sensitivity of which is regulated by resistor R6. .

The incandescent transformer T1 provides a voltage of 2x6.5 V at a current of 8 A. Its overall power is 110 watts.

Coils L1 ... L4, wound on resistors R1 ... R4 of the MLT-2 type, contain 5 turns of PEV-2 wire with a diameter of 0.62 mm.

The L6 anode choke is wound with PELSHO-0.35 wire on a porcelain frame with a diameter of 20-25 mm and a height of 150 mm. The number of turns is 150, the 50 turns closest to the anode are wound in increments of 0.5 mm.

Chokes L7 and L8 of any type.

A P-loop is used at the output of the amplifier. Capacitor C12 must have a gap between the plates of at least 1.2 mm. Capacitor C13 is a built-in unit of variable capacitors from an old-style radio receiver (with a gap between the plates of at least 0.3 mm). The rotating coil L5 is wound with a wire with a diameter of 2 mm and is equipped with a coil counter. Since the output P-circuit has three adjustable elements, in order to properly tune the amplifier in the range of 80 m, it is necessary to set the maximum capacitance of the capacitor C12 (250 pF) when working on a coaxial feeder and low SWR, the capacitance of the capacitor C13 should also be close to maximum. The circuit is tuned to resonance by rotating the coil L5, the connection with the load is regulated by the capacitor C13. In the range of 40 m, the capacitance of the capacitor C12 is 120 pF, in the range of 20 m --- 50 pF, in the range of 15 m it should be close to the minimum, in the range of 10 m --- minimum.

When mounting the amplifier, the input circuits must be separated from the output circuits by a screen, for example, the input circuits should be placed under the chassis, and the parts of the anode circuit above the chassis. The conductors of HF circuits should be as straight and short as possible.

A properly assembled amplifier starts working immediately. With self-excitation, the resistance of the resistors R1 ... R4 should be reduced by 1.5-2 times. When amplifying a single-sideband signal, to achieve an anode current envelope of 400 mA at the peak, an excitation power of 25 W is required.

G811 lamps can be replaced with GU50 type lamps in triode switching. To maintain the same input resistance (75 0m), three GU 50 lamps are switched on in parallel. Since the GU50 lamp has a heated cathode, excitation should not be applied to the cathode. The middle wire of the filament choke is connected to the cathode. The amplifier is assembled in a metal box 200 mm high, 400 mm wide and 300 mm deep. The power supply for the amplifier can also be placed in the same box. To reduce the temperature inside the amplifier, a small exhaust fan is installed.

++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

Sergey Safonov (4Z5JK)
KV-magazine №5-97
Transformerless power supply RA on G-811

Modern small-sized high-capacity electrolytic capacitors for flashlights make it possible to design transformerless high-voltage power supplies for lamp output stages of power amplifiers.
A schematic diagram of one of these sources, providing a voltage of 1200 V - to power the anode circuits of a power amplifier on four G-811 lamps, is shown in the figure.

The rectifier is made according to a full-wave circuit with a fourfold voltage multiplication. The use of voltage multipliers, made according to a full-wave circuit, improves the load characteristic of power supplies and reduces the ripple of the rectified voltage.
A distinctive feature of amplifying cascades powered by a transformerless circuit is the absence of galvanic connection between the lamp electrodes and the case and, consequently, the absence of galvanic connection between the case and the mains.
In order to exclude “pinching” from the body of the equipment through blocking capacitances connecting the body to the network, as well as for the purpose of general electrical safety, the equipment must be reliably grounded.
The probability of self-excitation of amplifiers in the low-frequency ranges is reduced by the use of two blocking capacitors in the anodes and cathodes of lamps, one non-inductive with a capacity of 0.01 μF (KSO, SGM, etc.), the other - paper with a capacity of 1 ... 2 μF with an operating voltage of at least 600 V. For this purpose, additional filter chokes with an inductance of about 500 μH with a small interturn capacitance are installed in the anode circuits. You can use ready-made chokes on ferrite magnetic cores.
To prevent diode failure, mains voltage is applied in two stages. When the amplifier is connected to the network, the voltage to the rectifier is supplied through a limiting resistor. After a few seconds, the latter is short-circuited by means of a button and a relay with a self-locking circuit.
With the ratings of electrolytic capacitors in the power supply and load current of 600 mA indicated in the diagram, the output voltage drop is about 10 V.
The transformerless power supply described above has been successfully used in the author's KB equipment for several years and has proven itself to be a reliable device.

"HF and VHF" 11-96.
Power amplifier on the lamp 811-A (G-811)

One of the options for the power amplifier on the lamp 811-A was presented by the technical laboratory ARRL.

When repeating, you can use an analogue of 811-A - a domestic G811 lamp.

Technical details:
Rin --- 50 Ohm;
Rout --- 50 Ohm;
Class of work --- B2;
Rin --- 12...15 W;
Rpodv. (to the anode) --- 200 W.

The lamp is connected according to a common grid circuit and the input resistance along the cathode VL1 is about 300 Ohms, therefore, in order to obtain Rin \u003d 50 Ohms, input circuits are used.

The following parts are used in the amplifier:
S1 - ceramic based switch.
L1 -5...9 µH;
L2 - 3...5 µH;
L3 - 1.6 μH;
L4 - 1 μH;
L5- 0.4.. .0.8 µH.

Coils of input circuits are wound on frames with SCR cores.

Dr1 - incandescent inductor, wound on a round ferrite rod with a diameter of 8 mm with a permeability of 400 ... 600 with a PEV wire of 1.6 mm and contains 30 turns in two wires. To increase the quality factor of the inductor, a step of about 2 mm should be maintained between each pair of turns of the winding. Before winding, the ferrite is wrapped with two layers of varnished cloth.

Dr2 - frameless, 4 turns of bare copper wire 1.6 mm, diameter - 17 mm, length - 30 mm. Resistor R3 is located inside the winding. As the latter, two 100 ohm, 2 W resistors are used, connected in parallel.

L6 - 22 turns of bare copper wire 2 mm on a 50 mm frame. Taps - from 2, 3, 5, 10 turns, respectively, counting from the variable capacitor C10.

S2 is a ceramic based rotary switch.

P1 - measuring head 0...1 mA. Both the anode current and the grid current are controlled.

VD1, VD2 - diodes 200 V, 750 mA.

VD3...VD8 - power diodes 600 V, 500 mA.

The high voltage winding T1 is designed for a current of 400 mA at a voltage of 540 V.

C14, C15 - electrolytic capacitors 10 microns, 25 V.

The input circuits are tuned with cores at the full anode voltage of the amplifier and an excitation power of 12 ... 15 W at a minimum SWR between the TX and the amplifier input.

The amplifier operates in class B2, so the appearance of grid current should not be a concern. When the latter appears at the time of setting up the P-circuit, it is necessary to ensure the outflow of power to the load using C10 and C12. Calibrate the amplifier using an RF voltmeter and a 50 ohm dummy antenna to determine the power delivered to the load.

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Here is another version of the UM on the G811:

Lamps with the right characteristic G-811 work well at zero bias on the grid, and therefore there is no need for a bias voltage source. The anode current of the G-811 lamp, when the SSB signal is amplified, can reach a rather large value - up to 210 mA. When several lamps are connected in parallel, the anode current increases in proportion to the number of lamps, which is equivalent to using a lamp with a large anode current pulse at a not very high anode voltage (1500 V). Such a lamp is known to require a small anode load equivalent resistance. This, along with the low output capacitance of the G-811 lamps, is very convenient when working on the 10-15 m bands, where it is quite difficult to create a circuit with a large equivalent resistance. The input impedance in a grounded grid circuit for two G-811 lamps is approximately 150 ohms, for four - 75 ohms. This allows an appropriate coaxial cable to be used to drive the amplifier.
The figure above shows a diagram of a linear amplifier with two G-811 lamps. The designs of most circuit elements have been described previously. There are no special problems with the mood of the amplifier.
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Transceiver and Power Amplifier Matching
on the example of an amplifier for 4 G-811

When connecting imported transceivers with broadband transistor power amplifiers to home-made tube output stages, on different ranges other than 50 ohms, I recommend using switched P-circuits.
The table summarizes the parameters of the P-circuits for all short-wave amateur radio bands and shows the input impedance of the output stage, assembled according to the scheme with common grids on 4 G-811 lamps.
The power amplifier has the following parameters:

Ua = 1320 V.
Io = 60 mA.
Pin.vax = 35 W.
Pout = 540 W per Rload. = 51 Ohm.

In order to increase the reactive power, each of the capacitors of the P-circuit C1 and C2 consists of two capacitors of constant capacity for an operating voltage of 250 ... 500 V. The input capacitance is about 25 pF. The length of the connecting cable between the transceiver and the RA = 45 cm. The values of the capacitances of the capacitors given in the table are indicated taking into account the input capacitance Сin and the capacitance of the connecting cable.
P-loop coils are wound turn to turn on core frames for fine tuning. Frame diameter 10 mm.

Range, m._______Rin, Ohm______Number of turns___ Wire diameter, mm___________С1, pf________С2, pf

160________________94,6____________25_____________0,51_____________________1500__________1220
80_____ ___________ 69,3____________14_____________0,51_____________________1220__________1020
40_________________47,4_____________8_____________0,51_____________________1000__________1000
30_________________43,4_____________6_____________0,81______________________720___________780
20_________________44,6_____________5_____________1,3_______________________460___________510
17_________________27,6____________4,5____________ 1,3______________________360____________460
15_________________21,1_____________4_____________1,3______________________ 320____________400
12_________________16______________3,5____________1,3______________________ 290____________380
10_________________11,4_____________3_____________1,3______________________ 266____________350

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In Ukraine, there is an established delivery system to such cities: Kyiv, Kharkov, Dnipro (Dnepropetrovsk), Odessa, Donetsk, Lviv, Zaporozhye, Nikolaev, Luhansk, Vinnitsa, Simferopol, Kherson, Poltava, Chernihiv, Cherkasy, Sumy, Zhytomyr, Kirovograd, Khmelnitsky , Rivne, Chernivtsi, Ternopil, Ivano-Frankivsk, Lutsk, Uzhgorod and other cities of Ukraine.

In Belarus, there is an established delivery system to such cities: Minsk, Vitebsk, Mogilev, Gomel, Mozyr, Brest, Lida, Pinsk, Orsha, Polotsk, Grodno, Zhodino, Molodechno and other cities of the Republic of Belarus.

In Kazakhstan, there is an established delivery system to such cities: Astana, Almaty, Ekibastuz, Pavlodar, Aktobe, Karaganda, Uralsk, Aktau, Atyrau, Arkalyk, Balkhash, Zhezkazgan, Kokshetau, Kostanay, Taraz, Shymkent, Kyzylorda, Lisakovsk, Shakhtinsk, Petropavlovsk, Rieder, Rudny, Semey, Taldykorgan, Temirtau, Ust-Kamenogorsk and other cities of the Republic of Kazakhstan.

Manufacturer TM "Infrakar" is a manufacturer of multifunctional devices such as a gas analyzer and smoke meter.

If the website does not contain the information you need about the device in the technical description, you can always contact us for help. Our qualified managers will clarify for you the technical characteristics of the device from its technical documentation: operating instructions, passport, form, operating manual, diagrams. If necessary, we will take photos of the device, stand or device you are interested in.

You can leave feedback on the device, meter, device, indicator or product purchased from us. Your review, with your consent, will be published on the site without specifying contact information.

The description for the devices is taken from the technical documentation or from the technical literature. Most of the product photos are taken directly by our specialists before the goods are shipped. The description of the device provides the main technical characteristics of the devices: nominal value, measurement range, accuracy class, scale, supply voltage, dimensions (size), weight. If on the site you see a discrepancy between the name of the device (model) and the technical characteristics, photo or attached documents - let us know - you will receive a useful gift along with the purchased device.

If necessary, you can specify the total weight and dimensions or the size of a separate part of the meter in our service center. If necessary, our engineers will help you choose a complete analogue or the most suitable replacement for the device you are interested in. All analogues and replacements will be tested in one of our laboratories for full compliance with your requirements.

Our company carries out repair and maintenance of measuring equipment for more than 75 different manufacturing plants of the former USSR and the CIS. We also carry out such metrological procedures: calibration, taring, graduation, testing of measuring equipment.

Devices are delivered to the following countries: Azerbaijan (Baku), Armenia (Yerevan), Kyrgyzstan (Bishkek), Moldova (Chisinau), Tajikistan (Dushanbe), Turkmenistan (Ashgabat), Uzbekistan (Tashkent), Lithuania (Vilnius), Latvia (Riga) ), Estonia (Tallinn), Georgia (Tbilisi).

Zapadpribor LLC is a huge selection of measuring equipment at the best price-quality ratio. So that you can buy devices inexpensively, we monitor competitors' prices and are always ready to offer a lower price. We only sell quality products at the best prices. On our website you can buy cheap both the latest innovations and time-tested devices from the best manufacturers.

The site constantly operates the action "I will buy at the best price" - if on another Internet resource the product presented on our site has a lower price, then we will sell it to you even cheaper! Buyers also receive an additional discount for leaving a review or photos of the use of our products.

The price list does not contain all the range of products offered. Prices for goods not included in the price list can be found by contacting managers. Also, from our managers you can get detailed information on how to buy measuring instruments wholesale and retail at a cheap and profitable price. Phone and e-mail for consultations on the purchase, delivery or receiving a discount are given above the product description. We have the most qualified employees, high-quality equipment and a favorable price.

Zapadpribor LLC is an official dealer of measuring equipment manufacturers. Our goal is to sell high quality products with the best price and service to our customers. Our company can not only sell the device you need, but also offer additional services for its verification, repair and installation. To make you have a pleasant experience after buying on our website, we have provided special guaranteed gifts for the most popular products.

The META plant is a manufacturer of the most reliable technical inspection devices. The STM brake tester is produced at this plant.

If you can repair the device yourself, then our engineers can provide you with a complete set of necessary technical documentation: electrical diagram, TO, RE, FO, PS. We also have an extensive database of technical and metrological documents: technical specifications (TU), terms of reference (TOR), GOST, industry standard (OST), verification methodology, certification methodology, verification scheme for more than 3500 types of measuring equipment from the manufacturer of this equipment. From the site you can download all the necessary software (program, driver) necessary for the operation of the purchased device.

We also have a library of legal documents that are related to our field of activity: law, code, resolution, decree, temporary regulation.

At the request of the customer, verification or metrological certification is provided for each measuring device. Our employees can represent your interests in such metrological organizations as Rostest (Rosstandart), Gosstandart, Gospotrebstandart, TsLIT, OGMetr.

Sometimes customers may enter the name of our company incorrectly - for example, zapadpribor, zapadprylad, zapadpribor, zapadprilad, zakhіdpribor, zakhіdpribor, zahidpribor, zahidprilad, zahidprіbor, zahidprybor, zahidprylad. That's right - zapadpribor.

Zapadpribor LLC is a supplier of ammeters, voltmeters, wattmeters, frequency meters, phase meters, shunts and other devices from such measuring equipment manufacturers as: PO Elektrotochpribor (M2044, M2051), Omsk; JSC Instrument-Making Plant Vibrator (M1611, Ts1611), St. Petersburg; Krasnodar ZIP OJSC (E365, E377, E378), ZIP-Partner LLC (Ts301, Ts302, Ts300) and ZIP Yurimov LLC (M381, Ts33), Krasnodar; OJSC "VZEP" ("Vitebsk plant of electrical measuring instruments") (E8030, E8021), Vitebsk; JSC Elektropribor (M42300, M42301, M42303, M42304, M42305, M42306), Cheboksary; JSC "Elektroizmeritel" (Ts4342, Ts4352, Ts4353) Zhytomyr; PJSC "Uman Plant" Megommetr "(F4102, F4103, F4104, M4100), Uman.