Big Robust RF Deck and Tank Pi-L Network

The Alpha 8410 utilizes an enhanced version of the RF deck found in the Alpha 99, but instead of the 2 x 4CX800’s that have been increasingly difficult to find, our engineers chose Two reasonably priced 4CX1000s.  These tubes are delivered to our distributor in massive quantity and have been chosen for applications world wide, which should guarantee a reasonably priced supply of these tubes for years to come.

A big, easy to grab knob is coupled to a hand balanced, heavy duty, four gang, commercially rated, ceramic switch assembly, so smooth, easy operation is guaranteed.  One of the wafers is used to select the proper input circuit, and the other three are connected to the famous, heavy duty, silver plated, hand made, Alpha Pi-L matching network, the Alpha 8410 will operate into up to a 3:1 SWR without the need for an external antenna tuner. Add the carefully chosen, massive, Tune and Load capacitors – both conservatively rated so they will give years of smooth performance, and you’ve got what it takes to switch bands, tune and load this amplifier easily and accurately.

On the 8410’s control board you’ll find a microprocessor that allows us to normalize amplification performance, calibrate the power and gain metering for each specific band, and increase reliability and durability. All of these functions aggregate into a single greater benefit for the user, ease of tuning. The 8410 comes standard with USB and serial ports for remote monitoring and performance data logging.

Simple Installation

Besides the power (mains) connection, there are only two required inputs to the Alpha 8410 - the Push To Talk (PTT), and the RF IN.  All RF connectors on the Alpha 8410 are standard SO-239.

No need for ALC input like lesser amplifiers.  The micro computing platform assures you don’t damage the tube by overdriving it.  Separate input match circuits for each Amateur band guarantees a proper match with any standard 50 ohm output from your transceiver.

Proudly Handcrafted in the USA

This amplifier is as rugged and reliable as anything we've created.  We buy the best components available for the Alpha 8410. Our stringent selection of even the simplest components demonstrates the commitment that we have to deliver the best, most reliable amplifier in the world. 

The Alpha 8410 is finely handcrafted and is designed and built in Boulder, Colorado, USA, comes with an industry leading 4-year warranty on the amplifier, and 1-year warranty on the tube, and is supported by our friendly and knowledgeable staff.  We build them by hand, tune them by hand, and burn them in overnight at full power so we know that when you get your Alpha 8410, you'll have an amplifier that is the most rugged, best built in the world. It's shipped on a pallet with the transformer packed separately so there's little chance of anything happening to it on its way from the factory to its new operating position in your shack.  

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SPECIFICATIONS:

Frequency coverage: All amateur frequencies from 1.8-29.7 MHz

Power output: 1500 Watts minimum on all served bands

3rd Order IM: <-30 dBc

SWR tolerance: 3:1

Drive power: 50 to 55 Watts nominal for full power out

Tube: Two 4CX1000 high performance power tetrode with a combined plate dissipation of 2000 watts provides key down performance on all frequency bands, all modes, and all duty cycles. 

Cooling: Forced air

RF Input connector: comes with a standard SO-239 connector, but we can install "N" Type connectors if you specify at time of order.

RF/Antenna output: comes with a standard SO-239 connector, but we can install "N" Type connectors if you specify at time of order.

Calibrated Wattmeter: The Bruene type wattmeter accurately simultaneously measures both forward and reverse power and displays this information on the easy to read bar graph meters on the front panel.  It also uses the information to simultaneously monitor the gain of the amplifier.

Protection Mechanisms: HV Interlock and Power Interlock.

Tuning/Band switching: Manual

Power: 100,120,200,220,240 VAC, 50/60 Hz, manual selection. At 240 VAC, requires 10 Amps per leg, for a total of 20 Amps.  Note: Although the amplifier will operate at 100V, the mains will have to be able to deliver upwards of 35 amps.

Interface: Serial port and USB. Full remote control capability.  

Protection: Protected against all common faults.

Display: Bar graphs display Power, SWR, Grid Current, Plate Current, Plate Voltage, and Gain - all simultaneously.  

T/R switching: Two vacuum relays enabling QSK (full break-in) at QRO (full power).

Bypass capability: 500 Watts.

Shipping Weight: 76 Lbs

Product Size:  17.5"w x 7.5"h x 19.75"d

Standard Shipping Packaging: We ship this the amplifier in a double box, and the  transformer in a separate box.