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FL-2100B Linear Amplifier | Radioaficion Ham Radio

FL-2100B Linear Amplifier

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Yaesu FL-2100B Linear Amplifier

The FL-2100B Linear Amplifier is designed to match the FT-101B/277B transceivers in appearance and drive requirements to run high power input covering the ham bands 80 through 10 meters.

The FL-2100B uses a pair of 572B/T160 transmitting triodes in a class B grounded grid circuit configuration. The tubes are forced-air cooled by two very quiet high speed internal fans.

Automatic Level Control circuit controls the exciter gain to allow the highest average power without distortion caused by peak clipping. Changeover circuit biases the tubes to cut-off. eliminating unwanted heat and diode noise generation when receiving.

An internal changeover relay feeds the antenna to the exciter for barefoot operation when the FL-2100B is turned off or is on standby condition. A built-in SWR bridge measures SWR on by barefoot and linear operations.

The built-in solid state power supply requires no warm-up period and provides excellent voltage regulation.

Yaesu FL-2100B Linear Amplifier

FRONT PANEL CONTROLS

  • POWER-OFF ; Rocker switch turns power on.
  • OPER-STBY : Rocker switch applies Bias when standby and relay is disengaged.
  • SWR-IP : Rocker switch selects either SWR or plate current meter reading.
  • F-R : Rocker switch selects either forward or reflected SWR bridge reading.
  • SENS : Potentiometer adjusts meter sensitivity for SWR measurement.
  • PLATE : Plate capacitor in tank circuit.

POWER REQUIREMENT

The FL-2100B has a built-in power supply which can be operated from either IOO, 117 or 220 volts AC 50-60 Hz.

Be sure that the voltage mat ked on the rear of theFL.-2100Bagrees with the local AC supply voltage.

ANTENNA REQUIREMENT

The FL-2 100B has been designed for use with an antenna resonant at the operating frequency and having approximate impedance within the limit of 40 to 80 ohms. The nominal output impedance of the FL-2100B is 50ohms. When the impedance of the antenna used is far from this value, it is recommended that an antenna matching network be used which will allow the FL-2100B to work into its nominal 50 ohm load for maximum power transfer into the antenna.

GROUND REQUIREMENT

The FL-2100B should be connected to a good earth ground through as short and as large a guage wire as possible for best performance and maximum safety. A connecting post marked *GND" is provided on the rear apron of the chassis.

CAUTION

NEVER OPERATE THE FL-2100B WITHOUT CONNECTING IT TO AN EARTHGROUND, AND AN ANTENNA OR 50 OHM DUMMY LOAD. OR SERIOUS DAMAGE MAY RESULT.

EXCITER REQUIREMENT

To operate the FL-2100B at its maximum power input, it will be required that the exciter deliver 100 Watts PEP SSB output.

The exciter should be placed as close to the amplifier as practical to avoid long coax and ground connections.

ALC

On the rear of the FL-2100B. a terminal is provided for connection to the exciter of the ALC voltage which controls the gain of the exciter to prevent distortion caused by peak clipping.

SPECIFICATIONS

Circuit : Grounded Grid Class B

Frequency Coverage : Ham bands SO through TO meters

Plate Input : 1200 Watts PER 1000 Watts CW and 600 Watts AM

Plate voltage : 2400 Volts DC

Drive Requirement : 1OO Watts PEP

Input Impedance : 50 ohms, unbalanced

Output Impedance : 50 - 75 ohms, unbalanced

Third Order Distortion : 30 db or better at 1000 Watts PEP

Tube Complement : 2 X 572B/T160

Cooling : Forced-air cooling

Power Requirements :

  • AC 100, 110, 117 Volts 50/60Hz 18 Amps
  • AC 200, 220, 234 Volts 50/60Hz 9 Amps

Weight 41 lbs

Technical documentation

Yaesu FL 2100: Operating Manual

Yaesu FL2100Z: Circuit Diagram

Yaesu FL-2100B INSTRUCTION MANUAL

EB5AGV's Workbench: Yaesu FL-2100B amplifier restoration

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