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For all short wave amateur bands from 1.8 to 29 MHz (including WARC – bands)

General description and the advantages of the OM3501A amplifier

The automatic linear amplifier OM3501A is designed for all short wave amateur bands from 1.8 to 29 MHz (including WARC – bands) and all modes. It is equipped with a one piece of ceramic tetrode GU78B.

The advantages of OM3501A:

• Full compatibility with TRXs-CAT

o - ICOM

o - YAESU

o - ELECRAFT

o - Ten-Tec Orion

o - Kenwood

o - Icom transceive protocol using by microHAM devices – CI-V output (MK II, MK2R, MK2R+, etc)

o - Flex Radio Series 6xxx

o - Apache Labs Anan

• RF sensitive Band and Frequency switching, for use with radios which do not have CAT

• Automatic switching between bands

• Automatic tuning with the band according to segments

• Automatic switching of band pass filter – BAND DATA output compatible with YAESU radios (BCD code)

• Automatic switching of the antenna switches - maximum number of antennas is 10, controlled by BCD output code

• Remote control via PC Windows Application

Specification of OM3501A:

Frequency coverage:

Amateur Bands 1.8 – 29.7 MHz including WARC

Power output:

3500 W in SSB and CW on HF bands, 3000W in RTTY/FM

Input Power:

30 to 80W for full output power

Input Impedance:

50 Ohm, VSWR < 1.5 : 1

Power Gain:

17 dB

Output Impedance:

50 Ohm unbalanced

Maximum Output SWR:

3:1

SWR protection:

Automatic switching to STBY when reflected power is 350W or higher

Intermodulation distortion:

better than -32dBc

Suppression of harmonics:

< -50 dBc

Tube:

GU78B ceramic tetrode

Cooler:

Centrifugal blower + Axial blower

Response speed of AUTO tune:

less than 0,5s within same BAND, less than 2s if out of BAND

Power supply:

switchable voltages - 220/230/240V for 50Hz or 230/240/250V for 60Hz (or other primary voltages e.g. 200V 50/60Hz for Japan)

Transformers:

2 pcs of toroidal transformer 3kVA

Dimensions: 485 x 200 x 455mm (width x height x depth)

Weight: 46 kg

Protection circuits: - VSWR too high

- Anode current too high

- Anode voltage error

- Screen current too high

- Screen voltage error

- Grid current too high

- Grid voltage error

- Heating voltage error

- Mistuning of PA

- Temperature too high

- Soft start for protecting your fuses

- “switch-on blocking“ at opened amplifier

Indications: 4.3" color touch screen display

Features: High level of protection

Memory for faults and warnings, easy maintenance

Automatic set-up anode current (BIAS) – no need to manually adjust after changing the tube

Three programmable working modes of the axial blower

Full QSK operation

Many operational parameters to display

REMOTE control - connector for LAN connection – remote control software free charge

Support automatic external ANT switching

LAN Connection

Power amplifier is interfaced to LAN via XPORT made by Lantronix (type XP1001000-05R). More info

can be found at www.lantronix.com .

Default factory settings of XPORT are:

IP address: 192.168.1.222

Mask: 255.255.255.0

Gateway: 192.168.1.1

These are strictly default settings. You can modify any of these by going to XPORT web GUI via your

web browser. We do not recommend changing any other parameters of the XPORT interface as loss of

communication can be caused by doing so. There is no default user name or password. It is highly

recommended to secure web interface with username and password.

For remote control and monitoring over LAN special software is needed. It is available free of charge,

it can be downloaded from the following address:

https://www.om-power.com/download/HF_PA_Manager_v3.33-setup.exe.

NOTE: For the correct functioning of the software, it is necessary to have accessible LAN

ports 9999 and 10001.

OM 3501A Manual

OM 3501A firmware upgrade manual

OM 3501A firmware and software download page

PRICE INCLUDES SHIPPING TO YOUR DOOR