Showing how the OM-Power Automatic amplifiers like the OM-2500A, OM-4000A, can control the selection of up to ten antennas driving an antenna switch and up to ten filters. A Vector Network Analyzer, Array Solutions’ VNA UHF is plotting the S21 (Filters Insertion Loss) continually.
The OM2500A linear amplifier is designed for all short wave amateur bands from 1.8 to 29.7 MHz (including WARC – bands ) and all modes. It is equipped with the ceramic tetrode FU-728F.
The advantages of OM2500A:
- Automatic switching between bands
- Automatic tuning with the band according to segments
- Automatic switching of band pass filter
- Automatic switching of the antenna switch
- The possibility to use 2 different antennas within one band or segment
-
Full compatibility with
- – ICOM
- – YEASU
- – ELECRAFT
- – Ten-Tec Orion
- – Kenwood
- – Icom transceiver protocol using by microHAM devices, CI-V output (MK II, MK2R, MK2R+, etc)
Specifications of the OM-2500A:
Frequency coverage: Amateur bands 1.8 – 29.7 MHz including WARC
Power output: 2500 W in SSB and CW
2000 W in RTTY, AM and FM
Driver Power: 60 to 80 W for full Output Power
Input impedance: 50 Ohm VSWR < 1.5 : 1
Output amplification: 15 dB
Output impedance: 50 Ohm unbalanced
Maximum output SWR: 2:1
SWR protection: Automatic switching to STBY , when reflected power is 350 W or higher
Intermodulation distortion: 32 dB below nominal output
Suppression of harmonics: < -50 dBc
Tube: FU-728F Ceramic tetrode
Cooler: Centrifugal blower + axial blower
Power supply: 2 x configurable for 220, 230 or 240 V AC – 60 Hz one or two phases
Transformers: Two toroidal transformers 2.0 kVA each
Protection circuits: – SWR too high
– Anode current too high
– Screen current too high
– Grid current too high
– Mistuning of the power amplifier
– Soft start for protecting your fuses
– “Switch –on blocking“ at top cover removal
Bar graph indications: – Power output – bargraph 50 LED
– Reflected power – bargraph 20 LED
– Current at screen ( Ig2 – bar graph 10 LED )
– Anode voltage, anode current, tuning – bargraph 30 LED
LED indicators: – Control grid current ( Ig1 – 2 LED )
– WAIT – Preheating of tube (180 sec )
– STBY– Standby
– OPR – Operating condition
– FAULT – failure, switching off for about 4 seconds
– Inhibit – operating condition
– ANT 1 – which antenna is in use
– ANT 2 – which antenna is in use
– UP – DWN – Listing in menu
– MAN – Manual operating
– AUTO – Automatic operating
– TUNE – Tuning
– ANT – Antenna selection
Parameters: 485 mm (19.1″) W x 200 mm (7.9″) H x 455 mm (17.9″) D
Weight: 40 kg (88 lb)
Reception problems owing to low audio levels plagued a recent round of Amateur Radio on the International Space Station-sponsored (ARISS) slow-scan TV... Read more
A Cygnus resupply mission to the International Space Station (ISS) on April 11 also delivered three CubeSats of the BIRDS-3 constellation and three ot... Read more
International Marconi Day celebrates the huge part Guglielmo Marconi played in the invention of radio. IMD is a 24 hour amateur radio event that is he... Read more
Icom IC-9700 Here it is! The all new Icom IC-9700 tri-band direct sampling transceiver. This is a most impressive rig and I will be showing many more... Read more
With an eye toward helping new and inexperienced hams enjoy the full range of activities that Amateur Radio has to offer, Hamvention® and the ARRL 201... Read more
ARRL and the FCC have signed a Memorandum of Understanding (MOU) that paves the way to implement the new and enhanced Volunteer Monitor program. The m... Read more
Attention all hams. Be one of lucky the winners to receive a commemorative Icom Hamvention® 2019 Swag Kit. Sign up today to be entered into the drawin... Read more
ARRL is rolling back Outgoing QSL Bureau rates to 2011 levels. Effective May 15, 2019, the new rates will be: $2 for 10 or fewer cards in one envelope... Read more
Owen Garriott The US astronaut who pioneered the use of Amateur Radio to make contacts from space — Owen K. Garriott, W5LFL — died April 15 at his hom... Read more
Thursday, April 18, is World Amateur Radio Day (WARD), this year marking the 94th anniversary of the International Amateur Radio Union (IARU), founded... Read more
News
Low Audio for ISS SSTV Transmissions Raises Issue of Crew’s Ability to Intervene
Three BIRDS Constellation CubeSats Delivered to ISS for Orbital Deployment
International Marconi Day
Icom IC-9700 Review, Demo And Walkthrough
“Mentoring the Next Generation” is Hamvention and ARRL 2019 National Convention Theme
ARRL and FCC Sign Memorandum to Implement New Volunteer Monitor Program
Commemorative Icom Hamvention® 2019 Swag Kit
ARRL Rolls Back Outgoing QSL Bureau Rates to 2011 Prices
Amateur Radio in Space Pioneer Astronaut Owen Garriott, W5LFL, SK
World Amateur Radio Day 2019 Marks International Amateur Radio Union Founding
Plug and play USB recording microphone with 5.9-Foot USB Cable included for computer PC laptop that connects directly to USB port for record music,com... Read more
ALL-MODE QRP TRANSCEIVER for HF + 6m +4m (12 Bands + General Coverage RX) MADE IN EUROPE (Coming Soon*) Aerial-51’s new A... Read more
FTDX101D Operation Manual (1904D-BS) ( 17.82 MB ) Amateur Radio \ Brochures \ HF/Satellite Transceivers and Amps FTDX101D Front Waterfall Pr... Read more
Italab HERCULES 1500 – HF RF POWER AMPLIFIER (1.8 – 30 MHz ) Extremely robust HF RF POWER amplifier, the RF section is equipped with 2 DUA... Read more
RigExpert Stick 60kHz – 35MHz Analyzer | State-of-the-Art Antenna & Cable Analyzer Key Features: Frequency range: 0.06 to 35 MHz, upgradable... Read more
Ailunce HS1 Description: Spectrum Dynamic Waterfall Display Multiple Working Modes：Receive Mode, Transmit Mode, TUNE Mode, VFO Mode, SPLIT Mode DSP Di... Read more
The splitter or combiner is a very useful device. It can provide equal voltages, equal current, or equal power to matched or unmatched loads. Like all... Read more
The K44 is the Swiss Army knife of CW keyers. A CW keyboard interface, CW reader, iambic paddle keyer, backlit LCD display, and optically isolated key... Read more
Ailunce HS1 Specification: Frequency Range: 0.5-30MHz Operating Mode – SSB(J3E)，CW，AM(RX Only), FM, FREE-DV TX Power: Max to 15w Product Dimensi... Read more
Equipment
Fifine Condenser Microphone K669B Review/Test
ALT-512 QRP TRANSCEIVER
FTDX101D Operation Manual
Italab Rfbroadcast – HERCULES 1500 – HF RF POWER AMPLIFIER (1.8 – 30 MHz )
RigExpert Stick 60kHz – 35MHz Analyzer
Ailunce HS1 HF SDR HAM Transceiver
2-way RX splitter
K44 CW Keyer & Reader w/Keyboard I/F by K1EL
Ailunce HS1 HF SDR HAM Transceiver
![Handheld Transceivers [ ARRL PODCAST ]](https://qrznow.com/wp-content/uploads/2019/04/maxresdefault-1-2-90x60.jpg)
![Handheld Transceivers [ ARRL PODCAST ]](https://qrznow.com/wp-content/uploads/2019/04/maxresdefault-1-2-180x120.jpg)
![Handheld Transceivers [ ARRL PODCAST ]](https://qrznow.com/wp-content/uploads/2019/04/maxresdefault-1-2-265x168.jpg)
