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4cx250b Amplifier Schematic - Radio Amateur 10-1965
https://www.radioexperimenter.us/rm-1965-10/v-qll.html
4cx250b Amplifier Schematic. This voltage and current is maintained with a charging voltage of 14 volts from the alternator. The transformers shown are surplus. There are many similar ones available from the …
Description of a 144 MHz high power amplifier for 2 x 4CX250B
http://www.popular-hifi.com/projects/pa2x_4cx250b/2m_pa_4cx250.pdf
The amplifier was designed for high power operation in CW or SSB mode and employs a pair of ceramic tetrodes type 4CX250B in push-pull configuration. The original construction was developed and published by KY4Z, but later improved by LA1BEA, DF8LC and LAØBY. This manual provides all information necessary to operate and maintain the amplifier.
Single 4CX250B base amp for the masses! | WorldwideDX ...
https://www.worldwidedx.com/threads/single-4cx250b-base-amp-for-the-masses.26162/
11. Install the componets for the HV portion of the amp, the Plate choke, the DC Blocking capacitor, the tank circuit. 12. Dip the Tank coil for resonance at the frequency or frequencies if multi-band. 13. Make all your connections and triple check them then, bring the amp up slow with low B+ volts and RF drive. 14.
4cx250b two tube amplifier BM Technology - YouTube
https://www.youtube.com/watch?v=MFJ9Hr7j5BI
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4CX250 Series - Tubes - Transmitting, Audio, Misc.
https://www.rfparts.com/tubes/tubes-4cx250.html
The 4CX250FG/8621 has a maximum plate dissipation rating of 250 watts and a maximum input power rating of 500 watts. The 4CX250FG/8621 is designed for operation at a heater voltage of 26.5 volts. The 4CX250R/7580W is designed specifically for use in Class AB1 linear amplifiers where shock and/or vibration preclude the use of non-ruggedized tube ...
4X150 4CX250 RF PA AUDIO POWER AMPLIFIER TUBE …
https://www.ebay.com/itm/154669233320
DUAL TUBE SOCKET ASSEMBLY FROM MODULATOR ASSEMBLY OF THE MILITARY T195 HF AM RADIO TRANSMITTER, orginally for 4X150D tubes, but works with 4X150A, 4CX250 power amplifier vacuum tubes. Sockets are mounted on a 4.3" x 2.9" chassis with 1.1" H bakelite chimneys; used: 4X150 T-195.
70cm 4CX250B Amplifier - epizy.com
http://g4oep.epizy.com/430meg/430megamp.htm
The amplifier as described in the RSGB VHF-UHF Manual is intended for linear SSB operation, and consequently the range of grid bias settings is suitable to set the G1 voltage to a value suitable for Class AB operation. The range of adjustment provided by the present circuit is between -61 and -34V, the Eimac literature giving -55V as a design ...
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