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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By doing so, we best approximate “one-point” ground. It has 6 turns with an inner diameter of 25 mm and a length of about 40 mm. Still far too few amateurs can say: Extending to the m band is possible with a larger RFC and an additional coil in series with L4 with switching of fixed capacit ratasheet. Across the coil L is the series combination of. Check it with a GDO datasueet absence of series-resonance in any amateur band.
These should be coated with a dull black heat-resistant paint. The internal heating activates a chemical diffusion process, which raises the emission level and also helps restoring good vacuum, thereby diminishing the number of possible “flash overs”. He le519 the result like him. The anode is in fact about the same size as that of the old and A power valves. They especially can withstand high voltages and peak currents.
Off-resonance, hefty currents can flow through the valves! Collective and individual bias.
A toroid, self-shielding because of its low external field, facilitates compact construction. In most cases its inductance is sufficient, even at a lowest frequency of 3. Off-resonance, hefty currents can ek519 through the valves!
Please note that these are OEM spec sheets,except for some of the Resistance Coupled Amplifier charts, you will not be downloading any pages of a regular tube manual that you already have. Adjust L1 in the 10 m band by pushing or pulling out the windings for lowest SWR with “key-down” power.
EL519 Datasheet PDF
Adjustment according to my “found” formula is a good directive for home-brewing amps that are meant for CW and SSB. This method can be used up to frequencies of several MHz without noticeably reducing fundamental power. The tuned input circuit also shortens the HF return path between anode and cathode by preventing this HF current to follow the longer path via the transceiver.
Calculating for inductance gives: These may have to be bent a little for a good fit. However, when miss tuning with full power, the voltage may rise satasheet several times this value and therefore V should be a safer margin. In all probability, pure class B or C was then adhered to. Apply a small quantity of super glue, possibly only a few drops, around the sides of the core.
The use of panel meters for the various eatasheet and currents depends on personal choice. In our case, matching is done with a 4: However, least problems arise with one-layer chokes. This wire being tinned, I believe the high skin-resistance helps in preventing parasites.
Closely wind the former with one layer of 25—28 SWG enamelled wires over a length of 5—10 cm. Tuning and loading C should be insulated from the chassis. I therefore based th e amplifier described here on a grounded grid amplifier, using cheap and still easily obtainable valves.
Short-circuit one or more for a standing current of about 20—25 mA. Adjust for maximal power at In the past I datasjeet built linear amplifiers in a test circuit, following published schematics or design formulae and copying given values of components. During transmit periods the screen-grid voltage is applied ratasheet the base of a Darlington pair which in turn short-circuit the 10 k?
After ten years or more television service, cathode emission remains near perfect and the PL is capable of sustaining over 1. For a T core, the inner diameter ratasheet be 28 mm diameter and the outer diameter 55 mm.
Can’t find it here? Only after this last adjustment is full linearity achieved. To avoid flashover in a new or a long time unused tube, it is prudent to prepare datashee it for his task.
After band changing, only two capacitors need to be tuned. The input- and output impedance of the amplifier are constantly varying and the driver sees a constantly varying load.
The Big Tube Data Page
SV2GNC’s amplifier, the external anode supply is not shown. If there are, try to shift them by removing or adding some turns. The regular visiting of datashert flea markets is a money-saving way to obtain parts for a home-brew linear amplifier meeting the requirements of the Telecom authorities.
The wirewound resistor 10—50? The pictures give an idea of the layout of the important components in the experimental amplifier.