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)
ARRL members and Amateur Radio clubs are expressing increased concern over the inclusion of WWV and WWVH on a list of proposed cuts in the White House... Read more
The US Coast Guard says it’s received reports from crews, ship owners, inspectors, and other mariners regarding poor reception on VHF radiotelephone,... Read more
AMSAT has announced that it has granted OSCAR designators for the Chinese DSLWP-A and DSLWP-B microsatellites, successfully launched on May 18 into a... Read more
On 8 August 2018, Norway got an updated amateur licence, allowing all Norwegian amateurs access to 50 to 52MHz with a power of 1kW. Other new privileg... Read more
SAQ, the old Alexanderson alternator transmitter at the World Heritage Grimeton Radio Station in Sweden, received 321 listener reports in response to... Read more
Robert S. “Bob” Morris, W4MYA, of Goochland, Virginia, died on August 14. An ARRL Life Member, he was 72. Morris had been suffering from cancer but re... Read more
A New Jersey radio amateur and Military Auxiliary Radio System (MARS) member has received a Lifetime Achievement Award from President Donald Trump. AR... Read more
The winning article for the August 2018 QST Cover Plaque award is “A Novel Approach to Using Window Line” by John Portune, W6NBC. The QST Cover Plaque... Read more
Reorganized and updated FCC Personal Radio Services (PRS) Part 95 rules have been published in The Federal Register. Among other things, the PRS cover... Read more
The SJ9WL-LG5LG Morokulien memorial station on the border of Sweden and Norway is off the air after a large tree, brought down during a severe storm o... Read more
News
Concern Rising within Amateur Radio Community over WWV-WWVH Shut Down Proposal
US Coast Guard Warns of LED Lighting Interference to Marine Radios, AIS Reception
Chinese Amateur Radio Satellites Receive OSCAR Designations
Norway gets 1kW on 6m and other bands
SAQ in Sweden Receives More than 300 Reports on Alexanderson Day, July 1
Well-Known Contester, DXer Bob Morris, W4MYA, SK
Dave Popkin, W2CC/AAR2BU Receives Presidential Lifetime Achievement Award
W6NBC Wins the August QST Cover Plaque Award
New FCC Part 95 Personal Radio Services Rules Published in The Federal Register
Storm Takes Down Antennas at Memorial Ham Station on Swedish-Norwegian Border
The Kenwood® TS-890S transceiver made its world debut at the 2018 Hamvention® in Xenia, Ohio. It features full down conversion receiver with h... Read more
Icom’s new PoC (Push-to-Talk Over Cellular) radio system allows you to communicate with your two-way radio system over a 4G / LTE closed network. Now... Read more
ES-4 COMES AS A CONTROL UNIT AND A BASE (SWITCHING) UNIT THE BASE UNIT RECEIVES 12V POWER AND HAS ALL THE HEAVY COAXIAL CABLES CONNECTED TO IT. THER... Read more
Over 25 years of experience in development of new transverter technologies led to this masterpiece of VHF technology. Implementing technological innov... Read more
Xiegu XPA125B is a small and lightweight 125 watt HF and 50 MHz solid state linear power amplifier perfect for your QRP radio or low power SDR... Read more
Introducing the new high precision 600 MHz Antenna Analyzer for measurements of antennas, cables and other one port devices. The new VA5 is a portable... Read more
The KX-QRP 2nd L👀K is an accessory for use with the Elecraft KX2 or KX3 Radios. These radios have the ability to decode RTTY, PSK and CW signals (with... Read more
The bhi GroundBreaker audio unit isolates the grounds on your bhi DSP noise cancelling product or other ancillary equipment from those of the radio sy... Read more
DESCRIPTION Rugged Portable DC Power Management System with built-in High-Efficiency Battery Charger! > High contrast OLED display > Power man... Read more
Gordon West WB6NOA interviews Kenwood Chief Design Engineer Toshio Torii JA6QXW on NEW Kenwood TS-890S during Hamvention 2018. Read more
Equipment
Kenwood TS-890 – Instruction Manual
Icom PoC Full Duplex Radio System, Nationwide Coverage Over 4G / LTE Mobile Phone Network
ES-4 Radio / Antenna Selector Switch between 3 radios and 5 antennas
TR 144 – PRO, Transverter for the 2m band
XPA125B 125W Solid State Linear Amplifier
FA-VA5 600MHz Vector Antenna Analyzer Kit
KX-QRP 2nd Look – Elecraft KX2 or KX3
GroundBreaker – Isolate your audio to remove RFI and ground loop problems!
PowerPlus – Rugged Portable DC Power Management System
![Kenwood TS 890S at HamNation [ Video ]](http://qrznow.com/wp-content/uploads/2018/05/TS-890S-l-190x122.jpg)
Kenwood TS 890S at HamNation [ Video ]
![4-Square installation in Eastport, Maine [ W2RE ]](http://qrznow.com/wp-content/uploads/2018/08/OZ1RDP_08_KBS_232_4Square-90x60.jpg)
![4-Square installation in Eastport, Maine [ W2RE ]](http://qrznow.com/wp-content/uploads/2018/08/OZ1RDP_08_KBS_232_4Square-180x120.jpg)
![Dayton Hamvention 2015 [ Video ]](http://qrznow.com/wp-content/uploads/2015/05/programcover-90x60.jpg)
![Dayton Hamvention 2015 [ Video ]](http://qrznow.com/wp-content/uploads/2015/05/programcover-180x120.jpg)
