Emtron dx4 for sale

It is an amplifier with gravitas capable of satisfying the serious and most fastidious station operator. All specifications and features, except output power, are the same all throughout the Emtron amplifier product range, and the DX-3SP comes complete with QSK module as standard.

The design deploys two durable FUF tubes improved Chinese mil-version of the 4CXB in parallel, with a total plate dissipation of Watts, comfortably delivering the expected output power and durability. These robust FUF tubes are manufactured in present production and are available directly from the manufacturer, or from Emtron, exclusively for Emtron amplifier owners.

emtron dx4 for sale

We believe that this new DX-3SP is physically the smallest Watt desktop RF amplifier on the market today, and the most popular as well. Only the filament tap on the transformer must be changed from 9 volt to 6 volt, if Eimac tubes are used! A Volt two-phase transformer is also available!!! Weight: 50 Kg lbshipped in two separate boxes, transformer and RF deck.

Dimension: w x h x d mm It utilizes a ceramic high quality 9-position band switch, separate individual position for each band. No band compromises like on many other amplifiers on the market. QSK module included. The conservative rating of the tubes, the tank and all other components, and the efficient cooling system allows effective operation at this power level.

The Emtron DX-3SP operating in class AB1 has a very sophisticated tube protection circuitry, designed to protect excessive plate current, screen grid current, screen grid voltage, control grid bias voltage, exciter overdrive, SWR, etc. The tube is also protected from excessive temperature by continuously monitoring the required airflow exhaust temperature.

In case of any fault, the amplifier is automatically cut off to bypass mode. A pressurized forced air cooling was achieved with a rugged temperature controlled 2-speed 72 CFM blower turbine which effectively cools all critical components of the amplifier. The blower is positioned in such a way that it prevents hot air being re-circulated through the system.

Also one additional axial sucking fan is placed just above the tubes, to further improve the cooling efficiency. In order to achieve full output power, an input power of approximately 30 to 60 Watts is required.Please price plus shiping to Miami,FL. Thanks in advance. I have 3 other working 30L-1 amps. I have lots of good spare parts and American A tubes. What do you need? Some writing on rear cover. Overall good shape. Contact me direct via my email please.

Can be used as interstage RF coupler in transmitter, low power tank in final max 40 watts or antenna tuner. Currently wired for vac service, 65w of drive gives w output. Heatsink cooled and no fan so it is very quiet. Very heavy so I prefer local pickup or I would be willing to drive part way to meet buyer. Several pictures upon request. K9VP at arrl dot net. Appears to be push pull. Filaments light. Also, single 4CX 75m amplifier on open chassis, probably best used as parts source.

No high voltage power supply on either unit. Make offer. Will consider delivering either or both within miles of Huntsville, Alabama. Multiple pictures can be made, as requested. The QTH. Please support the QTH. Here is how! Or, for now, you may continue to use this site without unblocking ads.

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epson dx4 printhead

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Toggle navigation. Forgot Password. Reviews Home. Have owned my DX2 now for over 6 years and it's still performing like it was brand new. Been a ham for around 40 years and of all the amplifiers I have owned in that time, the DX2 is miles in front. A real quality product. Unit was delivered by Rudi to a predetermined location inside a substantial box. Initial inspection revealed some loose screws etc.

After a short time on air the thermal overload engaged and the amplifier shut down for approximately one minute. Examination of the specifications indicated that the idle current on the GU74B's was high and after this was adjusted no further problems have beem evident.

Inside the amplifier is neat and well constructed, the tank being silver plated. The modular construction means that in the unlikely event of failure, a replacement module can be ordered and installed quickly. It's also pertinent at this stage to mention the four year warranty excluding tubes which is 1 year.

emtron dx4 for sale

The digital front panel display gives all the information necessary to operate the amplifier, and then some. I have been using the DX2 for a year so have had enought time to evaluate it. Any initial inconvenience has been well and truely offset by the brilliant performance of this amplifier.

I purchased the amp from ebay and to be honest I had never heard of Emtron. When I saw it for sale I only had about 6 hours before the bidding ended so I had to make a decision quickly after trawling the web for info. I am very pleased with my purchase. I am a professional electrical engineer and engineering quality is very important to me. The Emtron did not let me down.

I have been using the amp for about 12 months and I am really impressed.When you subscribe, you receive only messages for the product you have subscribed to. You can check your current subscriptions and remove yourself from subscriptions at any time by visiting the Reviews Home page and clicking on the 'here' box under Subscriptions.

If you have comments, questions, or problems with this procedure please write to the Forums Manager. We'll send a copy of the review along with your introduction. Send To:. To build the largest and most complete Amateur Radio community site on the Internet. This project involves a management team of volunteers who each take a topic of interest and manage it with passion.

The site will be something that everyone involved can be proud to say they were a part of. Toggle navigation. Forgot Password. Reviews Home. This amp tunes easily, runs flawlessly, and is about as big an amplifier that can be run off single phase power.

They are very difficult to find, and command a handsome price, but if you ever are lucky enough to own one, you'll proudly call it "The Beast" as well.

My Emtron DX-4 is powered from a seperate 3 phase power supply. The HT transformer is a back breaking 80 pound tape wound monster. The RF deck is top notch! First class RF engineering and workmanship. Rudi and Orlando did another outstanding job with the DX-4 3 phase. Indestructible and putting out a stiff 6 kW PEP if needed. The two GU84B tubes, capable of a total of 5kW plate dissipation are inexpensive and rugged. The amp is stable, smooth tuning.

One needs a certain physical strength to turn the massive bandswitch. Communication with Rudi is excellent by using the telephone. One gets answers instantly after posing the questions. For the others: there is no way you can go wrong with this monster amp. Just make sure the other parts of you radio station can handle the required power levels.

Yes it's true, the best just got bigger. I have just tryed out Emtron Australia's new released DX-4 amplifier. This robust amplifier is for the elite,for those big guns that need a little bit more. It has all the specifications as the DX To send this review to a friend, complete the form below. More than 12 Months.

There is a delay before newly submitted reviews are Approved.When you subscribe, you receive only messages for the product you have subscribed to. You can check your current subscriptions and remove yourself from subscriptions at any time by visiting the Reviews Home page and clicking on the 'here' box under Subscriptions.

If you have comments, questions, or problems with this procedure please write to the Forums Manager. We'll send a copy of the review along with your introduction. Send To:. To build the largest and most complete Amateur Radio community site on the Internet. This project involves a management team of volunteers who each take a topic of interest and manage it with passion.

The site will be something that everyone involved can be proud to say they were a part of. Toggle navigation. Forgot Password. Reviews Home. Another bonus is that the FUF tetrode is compatible with all 3 models. These venerable amplifiers are of the highest engineering design and quality.

The chassis is the strongest available in todays commercial amplifiers plus with the new up dates to have two radio's connected and with the flick of a switch swap from one to the other, like wise with the extra antenna outlets.

Swap antennas with the flick of a switch. All Emtron amplifiers come with all the above features as standard along with the best protection available. I have never had an issue at all with my amps or Rudi. My first being the DX-3 and it stood up to all tests both on air and into a dummy load. With the confidence in knowing that support was only a phone call away. This gave me the confidence in this product to purchase a 2nd bigger Emtron Amplifier. I have spoken to Rudi on a personal basis for quite a few years and so have others known to me, that is why I had no hesitation in purchasing not one but my 2nd Emtron Amplifier.

I have tested the emtron amplifiers into my homebrew dummy load. I built this using a 75ohm Carborundum Resistor and by tuning it back to I see it has been almost a year since a post. It troubles me to see non US amps or tubes get hard feedback.

Might have a lot to do with the LID at the controls. I fix all types, seen all the abuse. Well, I traded my as new Alpha which is a very good amp for the DX-3sp. Very lively, FUF's give themselves a good account for their performance.

emtron dx4 for sale

This is not an amp for the plug and play ham, be warned, it's equipment that must match the quality of your installation.Radioworld now offer finance through our partners Close Brothers.

Add the item to your basket in the normal way and at checkout choose to make payment via Finance. This amplifier stands on its own and has no competition.

Output Power This amplifier will comfortably deliver watts watts PEP continuous carrier "key down" into your antenna. Its conservative rating of all components and efficient cooling system allows effective operation at this power level. With watts of total plate dissipation, the DX-2 will operate well below the maximum power rating of the tube. Drive Power In order to achieve full output power, an input power of approximately 30 to 60 watts is required.

If your transceiver delivers more output power, reduce the drive level. Specially when operating RTTY or any other continuous mode, reduce the drive level and let your transceiver run "COOL" with less strain on its output components.

This watt plate dissipation tube has been constructed primarily for military communication, this tube is physically and electrically exceptionally rugged and with additional sophisticated protection circuitry incorporated in the DX-2SP, it is almost indestructible.

The tube is also protected from excessive temperature by continuously monitoring the airflow temperature. In case of any fault, the amplifier goes automatically into By-pass mode. A pressurized forced air cooling is achieved with a rugged temperature controlled two speed 72 CFM blower turbine which effectively cools all critical components of the amplifier.

The blower is positioned in such a way that it prevents hot air being circulated through the system. In order to increase the efficiency, an EBS Electronic Bias Switch is incorporated, and can be disabled if so required. The function of EBS Switch is well known. At all other times, the amplifier tube is virtually resting. No wonder, the nice compliments the DX-2SP operators get on the quality of their signals. The 2 second cut-off is then repeated until the drive level is being reduced.

This ALC circuit also produces a 0 - 10 V negative-going voltage, proportional to the grid current, but only when overdrive is present. However, connecting the ALC will prevent the overdrive condition to occur in the first place, and you will not be cut off.

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This gives a total capacitance in the high voltage section of 58uF and a voltage rating of volts. The soft start inrush protection circuit in the new DX-2SP amplifier is another unique design found in no other amplifier so far. It is the best soft start system available today.

The electrolytic capacitors are charged linearly over the 3 second period. This also affects all other circuit components in a similar manner.

The protection against excessive screen current is so good, that we have tested the operation with full screen voltage, while the plate voltage was absent, for extended time, without damage to the tube. Needless to say that there is quite a lot of sophisticated electronics present in the DX-2SP. This board contains: the screen grid supply with voltage regulator and current limiting, the regulated grid bias supply, QSK power supply, the 12VDC power supply, the overdrive, SWR, temperature control, EBS, plate overcurrent protection etc.

Display All important parameters such as plate current Ip, plate voltage Vp, output power, reflected power, screen grid current, linearity, ready, transmit, high SWR and fault are displayed on a single solid state display panel utilizing LED's of different colours. No switching of any parameters is required.

We have chosen this sophisticated and advanced system in preference to conventional moving coil meters even though this system is about three times more expensive than the conventional meters used by other amplifier manufacturers. All RF components such as band switch, tank coils, chokes, etc.

Finish The finish is of high quality durable baked enamel texture paint and silk screening of a quality not found on any other similar equipment.

EMTRON DX-3SP – HF Amplifier ( 4.5Kw )

So, get the biggest bargain in top brand linear amplifiers. You are getting a Rolls Royce for the price of a Volkswagen.It is an amplifier with gravitas capable of satisfying the serious and most fastidious station operator. All specifications and features, except output power, are the same all throughout the Emtron amplifier product range, and the DX-3SP comes complete with QSK module as standard. The design deploys two durable FUF tubes improved Chinese mil-version of the 4CXB in parallel, with a total plate dissipation of Watts, comfortably delivering the expected output power and durability.

These robust FUF tubes are manufactured in present production and are available directly from the manufacturer, or from Emtron, exclusively for Emtron amplifier owners.

We believe that this new DX-3SP is physically the smallest Watt desktop RF amplifier on the market today, and the most popular as well. Only the filament tap on the transformer must be changed from 9 volt to 6 volt, if Eimac tubes are used!

A Volt two-phase transformer is also available!!! It utilizes a ceramic high quality 9-position band switch, separate individual position for each band.

Emtron

No band compromises like on many other amplifiers on the market. QSK module included. This amplifier will comfortably deliver Watts Watts PEP continuous carrier "key down" into your antenna. The conservative rating of the tubes, the tank and all other components, and the efficient cooling system allows effective operation at this power level. The Emtron DX-3SP operating in class AB1 has a very sophisticated tube protection circuitry, designed to protect excessive plate current, screen grid current, screen grid voltage, control grid bias voltage, exciter overdrive, SWR, etc.

The tube is also protected from excessive temperature by continuously monitoring the required airflow exhaust temperature. In case of any fault, the amplifier is automatically cut off to bypass mode. A lot of attention was given to the design of the DX-3SP's cooling system. A pressurized forced air cooling was achieved with a rugged temperature controlled 2-speed 72 CFM blower turbine which effectively cools all critical components of the amplifier.

The blower is positioned in such a way that it prevents hot air being re-circulated through the system. Also one additional axial sucking fan is placed just above the tubes, to further improve the cooling efficiency. In order to achieve full output power, an input power of approximately 30 to 60 Watts is required. If your transceiver delivers more output power, reduce the drive level.

A unique feature in all Emtron amplifiers is the overdrive control circuitry. It is virtually impossible to produce a broad distorted splatter signal in a Emtron amplifier. This "Overdrive Control Circuit or "OCC", senses any slight overdrive less than 50 micro-amps of grid current and departure from linear AB1 operationa LED warns you, and if you don't do anything about it, the amplifier will bypass itself for 2 seconds. The 2 second bypass is then repeated until the drive level is being reduced.

There are only two cables required to connect the transceiver to the amplifier, the RF and PTT cables. This gives a total capacitance in the high voltage section of 58 uF and a conservative voltage rating of volts DC.

The soft start inrush protection circuit, standard in all Emtron amplifiers is another unique design found in no other amplifier so far. It is the best soft start system available today. The electrolytic capacitors are charged little by little and linearly over the 3 second period.


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