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)
With the National Hurricane Center (NHC) expecting Tropical Storm Isaias to become a hurricane again later today and make landfall this evening, the H... Read more
Russian cosmonauts on board the International Space Station plan to transmit slow-scan television (SSTV) images on August 4 – 5. The SSTV images will... Read more
The Hurricane Watch Net (HWN) activated on 14.325 MHz on July 31 at 1500 UTC as Hurricane Isaias [pronounced: ees-ah-EE-ahs] heads toward the US on an... Read more
Source:https://swling.com/ During this session, the [ARRL] Board took the following actions: Accepted the final recommendations of the Band Planning C... Read more
The FCC has issued a Forfeiture Order (FO) calling for HobbyKing to pay a fine of $2,861,128 for marketing drone transmitters that do not comply with... Read more
It is planned Russian cosmonauts will transmit amateur radio Slow Scan Television (SSTV) images from the International Space Station (ISS) during Augu... Read more
The University of Maine Wireless Sensing Laboratory (WiSe-Net Lab) and AMSAT have signed an agreement to collaborate on building and operating MESAT1,... Read more
Phil Karn, KA9Q; Randy Standke, KQ6RS, and members of the Mount Carmel High School Amateur Radio Club (MCHSARC) in San Diego have constructed and depl... Read more
A well-known contester and the co-builder of contest stations in Texas and Nevada, Grady Ferguson, W5FU (ex-NA5R), died of COVID-19 on July 14. He was... Read more
Christopher “Chris” Brault, KD8YVJ, of Liberty Township, Ohio, has been selected as the 2020 Bill Pasternak WA6ITF Memorial Amateur Radio Newsline You... Read more
News
Hurricane Watch Net Reactivates as Hurricane Warning Posted for the Carolinas
Slow-Scan Television Activity August 4 – 5 from ISS will Commemorate Apollo-Soyuz
Hurricane Watch Net Activating as Hurricane Isaias Approaches US East Coast
New Technician HF Privileges Defined: ARRL board accepts final recommendations of the Band Planning Committee
FCC Fines HobbyKing Nearly $3 Million for Marketing Unauthorized Drone Transmitters
ISS MAI-75 SSTV activity planned for Aug 4-5
AMSAT Partners with University of Maine WiSe-Net Lab to Develop State’s First CubeSat
High School Marine Buoy Transmitter Now Active on 20-Meter WSPR
Well-Known Contester and Contest Station Builder Grady Ferguson, W5FU, SK
Chris Brault, KD8YVJ, is 2020 Amateur Radio Newsline Young Ham of the Year
stay tuned for details… Source:Link Read more
Frequency coverage RX 0.1–30MHz Frequency resolution 1Hz Dial step 1Hz to 1KHz Dual VFO Direct sampling 16bit high speed 122 M/s ADC Mode CW, SSB, AM,... Read more
“New RigExpert Green ZOOM Family of the antenna & cable analyzers Dear RigExpert Followers, We are glad to present you a New RigExpert Green... Read more
Sneak peek at the Andromeda 100W Transceiver…… 10th GEN Intel 6 Core i7, 7 inch built in touch screen and an option to add up to two Exter... Read more
Making your field operation more fun and convenient with the LC-192, the IC-705’s utility backpack. The IC-705 fits perfectly in the optional LC-192 m... Read more
Description Buy from EladUSA with Factory Support from Microtelcom PERSEUS is a software defined VLF-LF-MF-HF receiver based on an outstanding direct... Read more
Assembled a prototype of Geckokapula V2 a dualband 70cm/13cm handheld FM/CW radio. It also does AM and SSB reception in addition to FM and CW. An awes... Read more
Equipment
New Kenwood ST-995SDR ?
The new Silphase R1 SDR receiver
New RigExpert Green ZOOM Family of the antenna & cable analyzers
Andromeda 100W Transceiver -Apache Labs
ICOM LC-192 for IC-705
Perseus SDR – EladUSA
Assembled a prototype of Geckokapula V2 a dualband 70cm/13cm handheld FM/CW radio
