PA500 Quickstart Guide

PA500 RF linear amplifier Kit with automatic antenna tuner

Operating frequency range between 3.5MHz – 30MHz

The device requires an amateur radio transceiver to operate. This device is for use by licensed radio amateurs only

PA500 Quickstart Guide


PA500 Quickstart Guide

LEDs and Button functions

PA500 Quickstart Guide

PA500 Quickstart Guide: Getting started

Before using the PA-500, you’ll need to connect a power source with a sufficient power. We recommend to use a power source (a battery or a AC/DC power supply) which can provide 12 to 15V and up to 15A of continuous current.

 there is no reverse polarity protection, incorrect wiring will destroy the device.

The PA500 need to be connected to a transceiver. In the simplest case, a connection of the PTT signal from the transceiver is sufficient to control the PA. In this specific case, the frequency band to be used need to be set manually on the PA500.

Some transceivers provide an “analog band signal” to configure external devices like a PA. Another possibility is to obtain information from the transceiver via a digital interface (CAT). All of these three interface options are supported by the PA500.

A list of the supported transceivers which provide a form of automatic frequency band reference will be find in the chapter “Compatible transceivers”.

  Please do not forget to set the CAT interface of your transceiver to the appropriate baud rate.

  Please configure your Radio CAT Interface to: 38400 baud, 8 data bits, 1 stop bit, no parity.

Powering up

After reading these brief instructions, you will be able to put the PA500 into operation.

1. Make sure that the transceiver with its RF-Out is connected to the RF-In connector of the PA500 using a suitable 50 Ohm antenna coax cable. A suitable antenna must be connected to the RF-Out connector of the PA500.

2. Connect your transceiver and the PA500 with the appropriate control cable. This control cable is necessary, so that the PA-500 can be switched accordingly by the transceiver during a transmission. If no special transceiver selection is made, the PA500 is in manual mode as well as in PA-bypass mode. A correct baud rate must be configured in the transceiver if the automatic band selection via the CAT interface is selected.

3. Please make sure that the Transceiver RF-Output power is set correctly. See also section: ‘operating mode and drive power’.

4. Switch on your transceiver and the PA500. To Power on the PA500, Press the ‘BAND’ and ‘BYPASS’ buttons simultaneously for about 2 seconds. After powering on, the white LED must light up. You can turn off the PA500 in the same way.

Device configuration

Auto-Band SWR/PWR indication

PA500 Quickstart Guide: Compatible transceivers

PA500 Quickstart Guide

Operating modes and drive power

PA500 Operating modes and drive power

Overdriving the PA leads to the harmonic distortion exceeding the permitted limits.

The maximum output power is achieved with a matched antenna. If the antenna is not matched, tune the antenna to the right impedance with the integrated antenna tuner.

safety instructions

The device can get very hot. It must be operated in such a way that there are no heat-sensitive objects near the device. Please ensure that the device is always well-ventilated during operation. Please be aware that the device is still hot for a while after use. Please keep the device away from children, the device develops a temperature level which can cause burns to the skin.

temperature and ventilation

The device must be operated in such a way that ventilation is guaranteed at all times. Please never expose the device to direct sunlight. External ventilation may be necessary in extreme operating conditions.

EM interference

This equipment has been tested and found to comply with the defined limits for amateur radio equipment. This device is not tested in an accredited laboratory but all measurements were applied with suitable measuring devices. The device itself does not emit radio frequency energy to the antenna without a connected amateur radio transceiver.

These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy when it’s connected to an amateur radio transceiver and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.

However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.

• Increase the separation between the equipment and effected receiver device.

• reduce the output power until the device no longer interferes.

• Consult the dealer or an experienced radio/TV technician for help.

Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

CAUTION: Changes or modifications to this device, not expressly approved by DIY599 could void your authority to operate this device under compliance regulations.

  This device is for use by licensed radio amateurs only

Grounding and ESD protection

A connected transceiver should be connected to ground to provide some protection against lightning and damage due to electrostatic discharge (ESD). When used in a building, the connected transceiver should also be connected to other building grounds.

Power considerations on the go

The “Buddipole POWERmini USB” is a pocket-sized 12 VDC portable DC power management system with built in solar controller that is particularly suitable for portable operations. This device can deliver up to 32A at 12V. this makes it a suitable device for supplying your transceiver and the PA500 with power on the go.

PA500 specifications

PA500 specifications

PA500 Quickstart Guide: DISCLAIMER of LIABILITY

All PA-500 specifications and descriptions are based on the latest information available at the time of this document’s printing.

As we are always striving to improve and update our products, ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE and DIY599 reserves the right to make changes and improvements at any time without further notice or obligation to notify any person or organization of such revisions or changes, made in order to improve the reliability, function, quality and design and/or performance of the PA-500. Further, this Manual is provided “as is” and DIY599 shall not be liable for possible errors contained herein.

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