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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I used the both tetrode sections in parallel, with only one classic parasitic suppressor.

EL519 Datasheet PDF

The input- and output impedance of the datasheer are constantly varying and the driver sees a constantly varying load. Repeat the procedure, alternating between loading C and tuning C, till maximum power is reached. It has 6 turns with an inner diameter of 25 mm and a length of about 40 mm.

After band changing, only two capacitors need to be tuned. The tube is thicker and often is the envelope made of thicker glass, but there is quite a difference in the mutual dataasheet.

Now raise the drive level to W and repeat. Assessment of The Microwave Tube Industryan inside look at fl519 high-tech tubes are used for, why they’re used instead of transistors, what’s in them lots of beryllium! So, it seems that the GU tube, cheap on eBay, is a good choice for this kind of amplifier”. Tuned out input capacitance.


EL Datasheet, PDF – Alldatasheet

The grids are negatively biased with respect to the cathode through the forward voltage drop of the string of diodes, which positively biases the cathodes with respect to earth. Curve plots for popular current production12AX7’s: I found my results to differ from the formulae and tables as found in handbooks of the years ‘ At each valve socket, all six grid-pins must connected to each other and be grounded via one point to a common spot chassis, print-board copper side with short connections of thick wire or ribbon strip low inductance.

Don’t forget the control lead for the relay! This was done in order to limit the overall dimensions of the amplifier.

EL519 Datasheet

The knobs are made with a lath. According to some users the tube is “stronger” than an EL, but there are also negative messages.

Another solution is to remove 1 cm of the windings and start again, leaving a gap of 1 cm between windings; then check again. This capacitance must be tuned out left fig on the higher-frequency bands. The nominally W output — W is based on the quadrupled supply schematic. For them, more in formation has been included. A part of the input power is dissipated in a 50?


Still far too few amateurs can say: With about 5 W driving power the output was 80 W and W was sufficient for even W output. Only after this last adjustment is full linearity achieved. Both are mounted on a cooling block in the datashheet of the blower. Across the coil L is the series combination of.

EL Datasheet PDF –

Normally the anode- or output -impedance is known or can be calculated, or can be taken from a graph. Can be precautionary mounted. Expelling hot air, or blowing in fresh air may do cooling.

According to the truth table S1 should not be “off” if S2 is “on”. After testing, the e lectrolytic cap should be discharged through a resistor.

With this last construction it might be even possible to use bare copper wire for the 25 turns with of respectively taps on 4 and 11 turns of 14—19 SWG enamelled wire. Because the cathodes are not at HF earth level, the filaments are by-passed to earth with capacitors.