Dual 3-500z amplifier
They wanted to buy an amplifier that needs no circuit improvements - that is, a perfect amplifier. What follows is a discussion of some design features that - in my opinion - would be present in a perfect, or near-perfect, amplifier. In a directly-heated type cathode, a ditungsten carbide layer on the hot tungsten alloyed with about 1. In an indirectly-heated type cathode, the filament a.
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Red Wave Radio
Rodger Singley Mon, 27 Nov Skip to site navigation Press enter. Joe and Drakelist, You definitely should not be driving the grid current to excessive levels as this can easily damage the tube. A couple of thoughts: 1. I would be very cautious about any continuous carrier testing at above watts DC input. Is your loading control adjusted properly? Generally, the proper operating conditions will be reached with a fairly heavy setting of the loading control and a lightly loaded amplifier will have excessive grid current and poor linearity.
For a dual Z amplifier at watts input, you should use around watts drive maximum to reach the rated watt input with proper operating conditions. I wouldn't try to drive the L4B to the current legal limit as you are operating in past its design limits and you are not gaining any significant increase in received signal strength; going from to watts output is less than 2 db and the typical s meter is 6 db per unit so the receiving operator wouldn't even be able to tell the difference.
If you increase the loading too far past the optimal point, efficiency will suffer. Generally this will help to prevent excessive grid current as the transmitter drive will be automatically reduced. I also have a homebrew triple 4CX amplifier which I built to stand up to contesting and to work as a linear amplifier follow a high level AM transmitter and the most critical parameter on it is screen grid current; fortunately not an issue with the L4B and similar triode amplifiers.
I wouldn't operate CW in the high voltage position as this does put too much stress on the tubes and power supply. You might also want to run the power supply on volts as soon as possible as the voltage regulation will be better and there will be less chance of flickering or dimming lights in the rest of your house.
Tell me if you agree. I restored an L4B and rebuilt the power supply. PS voltages check out fine. I drive it with a T-4XC at 90 watts. On 40m, RF output is w. Plate amps shows. Plate voltage is at on TX at rest.
The grid bothers me as the meter pins past full scale. If I drop the RF drive to around watts, the grid current drops to ma. The amp is running on VAC for now. Thanks for your tips! Previous message View by thread View by date Next message. Reply via email to.
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3 500z amplifier
An watt continuous commercial rated Hypersil transformer is standard with heavy duty rectifiers in a full wave bridge supply with computer capacitors. Silver plated tank components provide high efficiency operation above 20 meters. The Pi-L tank circuit permits full impedance matching capability over the entire meter band. The cooling system keeps the components and tube safely below the manufacturers ratings, even while operating at watts output with a steady carrier. The filament supply has inrush current limiting to insure maximum tube life. The AL has two illuminated meters.
SM-3500 Dual Channel Power Amplifier
Things with this gray color background are original from the author listed below This file was originally composed by the author listed below. It was copied here because naturally over time the web changes and I did not want to lose the data. All credit goes to that author for the work to compose this page. I am thankful for the work he performed and hope he understands why I "preserved" this page for it's usefulness. Trademarks, etc. The Elmac Z is a compact power triode intended to be used as a zero-bias Class AB 2 amplifier in audio or radio-frequency applications. Operation with zero grid bias simplifies associated circuitry by eliminating the bias supply.
The CB Radio Talk Forum
Parallel capacitance: pF, 1 kV silver mica capacitor. Resonant at T-2 15 meters 0. T-3 20 meters 0.
Ameritron AL-82 AMPLIFIER – TWO 3-500Z
All four models in the series are powerful, rugged and reliable. They are suited for musicians, DJs, and entertainers as well as houses of worship, discos, and pubs. They are identical except for output power. With over six decades of experience designing and building rock-solid products, Crown is the standard in amplifier technology. They are a powerful argument for quality and value! If any of the links above result in strange characters in your browser, please right-click the file to save it to your computer.
Category: 3 500z amplifier
Kenwood TSS in good condition. I bought the unit modified for AM use and in nonworking condition and I have since realigned and repaired for ham use. HV board was fried in unit but has been repaired. Still has AM mod installed inside and was not remove due to my technical inexperience. Full output on all ham bands.
Handbook dual 3-500Z design
QRZ Forums. OK, so I'm looking through some of my old handbooks and read through the dual Z amp project in the 94 edition. The design looks pretty standard and the write up claims it'll do W out.
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Memphis vocal samples reddit Avet reel manual Amazon financial analyst salary reddit Oppo egypt Parallel capacitance: pF, 1 kV silver mica capacitor. Resonant at T-2 15 meters 0. T-3 20 meters 0. T-4 40 meters 0.
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