With about 5 W input the amplifier provides an RF output of about 80 W on 28 MHz rising to about watts on MHz, using a single PL (EL) that had . EL/6KG6. High Performance Beam Power. Tetrode he Svetlana EL/6KG6 is a beam power tetrode intended for use in class A,. AB or B audio amplifiers. EL Substitutes. No information available. EL Ratings. No information available. EL Application Data. No information available. EL Data sheet.

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As a rule, the individual products of standing current and anode voltage should stay below the maximum dissipation of 35 W per valve. There are various opinions and solutions how to do it, but with a PL it can be relatively simple.

Note that the newElectro-Harmonix A is now available,and it does not requireany rewiring to use. In most cases a tuned circuit between driver and final stage is recommended.

Across the coil L is the series combination of. I leave it to the pro’s to argue about which specific valves should be used in this project; when properly adjusted, every amplifier will behave linearly.

As the control grid is loaded with a low resistance, I think that in this design the tube can also be used with even the anodes in parallel, see the proposed schematics. Inexperienced hams, in the Netherlands as well as well as in Great Britain, dqtasheet successfully built this W PA-project, more or less duplicating the here-publishe d design published here.

The valve seems to be virtually indestructible dataseet its performance limited only by envelope temperature.

EL519 Datasheet PDF

According to some users the tube is “stronger” than an EL, but there are also negative messages. Furthermore it varies during a SSB transmission because the driver the transceiver is delivering power varying between say 0. Short-circuit one or more for a standing current of about 20—25 mA. ON5DRE, click too enlarges. The knobs are made with a lath.


The Big Tube Data Page

If there are none, you are lucky. With collective bias, individual-resting currents will differ. As has been stressed before, the valves should be cooled very well in order not to fail prematurely or have a short life expectancy.

Use the procedure in the image for correct adjustments. If possible, proceed initially with lowered supply voltage. If, after applying power, the linear does not lift from your desk, you probably did everything right. There are special long fuses for high voltages, but in this design, the standard fast VAC ones have been used.

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EL Datasheet, PDF – Alldatasheet

However, the SWR will be higher on some bands, causing a transceiver without built-in antenna tuner to resolutely settle back. This was done in order to limit the overall dimensions of the amplifier. PE2B’s home brewed amplifier.

Damping can be achieved by paralleling the hairpin circuit inductor with a non-inductive resistor and by making the inductor from resistive material. We then see a combined L- and PI-network.

The capacitance of the electrodes to each other including the neutralisation of two anodes is very low for the HF amateur bands. LA8LJA has to my knowledge at first tested this idea with an experimental amplifier for the 20 m band. Now raise the drive level to 10 W and repeat. He calls datashet converted amplifier “Yuri” because of the Russian military tube GU?? Note for example in the photos on the anode and the small plates above the anode. Being a passive-grid amplifier, most of the input power is dissipated in a non-inductive carbon resistor applied to the control-grid of the valve.


Resistance Coupled Amplifier Charts: Now we calculate the value of L: This results in lower efficiency through higher circulating current losses and a lowered output at the antenna terminal.

This type of linear has many desirable features, including low cost, low component count, stability due to the swamping effect of the passive grid input load and simplicity of the construction. An adequate choke is a short ferrite rod with 30—50 turns of 25 SWG enamelled wire. This is to prevent too intense IR back-reflection.

A sturdy ceramic wire-wound resistor, with its resistance wire removed, will make a good former. Usually Datasheeet will not reactivate longer than 30 minutes.

In most cases its inductance is sufficient, even at a lowest frequency of 3. Both are mounted on a cooling block in the vicinity of the blower.

EL519 Datasheet

For safety reasons in my test amplifier, the two switches for doubling or quadrupling the voltage have been replaced by relays, which are controlled datashret push buttons on the front panel. After a while however, one will get an itch to experiment with this or that. So I think the positive sound comes from users who apparently obtained the better product.

If you don’t want the feature eel519 tuning up with lowered voltage which prevents problemsthe switches may be left out and the appropriate connections made. I therefore based th e amplifier described here on a grounded grid amplifier, using cheap and still easily obtainable valves. When using valves in parallel, we have to consider the individual differences.