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 mentioned before, any voltage between and V is usable and will determine to a large degree the maximal power output, keeping in mind the proper idle current dagasheet. Assuming that the anode lead is about 12 cm long about 0. To avoid flashover in a new or a long time unused tube, it is prudent to prepare “reactivate” it for his task. By grounding the plus pole of the meter, one can obtain many meter functions with a one-waver switch. Keep in mind that non-professional fuses will blow, daasheet a rule, at 2 times the nominal current.
If you use 1 – datxsheet mm diameter tinned copper wire, it will have sufficient skin resistance for VHF. 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.
The contact area should be scraped bright as well as the area where the connecting lead is to be soldered. We then see a combined L- and PI-network.
EL519 Datasheet PDF
This was the basic circuit, however for safety reasons I do not advocate this design for inexperienced home brewers! In this circuit all grids are at earth potential. The output power is about 80 W with 4 W drives and about W with 10 W drives.
With a 3-way step-up quadrupling circuit, the voltage obtained is sufficient. Adjust L1 in the 10 m band by pushing or pulling out the windings for lowest SWR with “key-down” power. The glue prevents the washers from moving out datzsheet alignment while the core is being prepared for winding. SV2GNC’s amplifier, the external anode supply is not shown.
EL datasheet,datasheets manu Page:1==Logic IC ==[未知厂家] pdf datenblatt – –
I leave it to the pro’s to argue about which specific datadheet should be used in this project; when properly adjusted, every amplifier will behave linearly. Don’t overloa d them and restrict tuning with full power. Repeate the procedure, alternating between loading C and tuning C, till maximum power is reached.
With about a drive of about 2 W he obtained W output. Check it with a GDO for absence of series-resonance in datashewt amateur band. The coil L1 can be an air wound one or made with a yellow T toroid. An adequate choke is a short ferrite rod with 30—50 turns of 25 SWG enamelled wire.
My experience with hairpin parasitic suppressors is that they work better than inductors with parallel resistors. Can be precautionary mounted. They will even function well with anode voltages far in excess of Volts, but in order to protect you from extra problems not to mention the wrath of neighbours and Telecom authoritiesI am advising you to apply only with — Volts.
L2 with trifilar turns on a ferrite rod or on a ferrite toroid. With my formula we find as a suitable anode load R a for. The older, valves transceivers wi th pi output tuning do not have this problem. Thanks to the extra current limiting resistor in the anode circuit, I never had problems with these fuses in all my amplifier projects. When cooled sufficiently, these sweep-valves are nearly impossible to destroy.
Explanation the principle of deriving screen grid voltage from input signal. Note for example in the photos on the anode and the small plates above the anode. At W output the valves would also dissipate nearly W intermittently.
The string may be connected directly to the VAC mains. Modern transceivers only work optimally if they see a near less reflections load. Both methods have been used in my compact test rig and the first method seems best. The 20—80 m coil is wound on an Amidon T toroid core. This topic, in Dutch, was originally written about in order to fill some gaps in the Dutch vatasheet on this subject.
However such method can be used only where the fundamental and parasitic frequencies are sufficiently far apart, so that excessive dayasheet losses of the fundamental frequencies are avoided.
Eventual use a datazheet trimmer for minimising the input SWR in the 10 m band. During non-transmit periods the second contact set on the changeover relay Rel1 opens and the 10 k? With simple means, the results were measured and tabulated, after which I tried to find a matching formula.