Icom IC-R8500 Antenna connection Grounding, Using a long wire antenna for HF bands

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HF ANT

2 CONNECTIONS

■Antenna connection

■Grounding

Antennas play a very important role in receiver opera- tion. Connecting a poor quality antenna to the IC-R8500 will result in less than optimum perfor- mance.

The IC-R8500 requires at least 2 antennas for full fre- quency coverage: one for 0.1 to 30 MHz and one for 30 to 2000 MHz.

DUsing a long wire antenna for HF bands

The IC-R8500 has a 500 Ω phono (RCA) antenna

connector for the HF bands. When using a long wire antenna, instead of a 50 Ω matched antenna, use one as long as possible (at least 10 m, 33 ft) and select the active connector as follows:

➀Push [SLEEP/ SET ] for 1 sec. to enter quick set

mode.

➁Rotate the [M-CH] selector to select the “HF ANT” item.

➂Rotate the main dial to select the antenna connector.

➃Push [SLEEP/ SET ] momentarily to exit quick set mode.

500

RWARNING: NEVER use a gas pipe or electri- cal conduit pipe for grounding.

To prevent accidents involving electricity and interfer- ence from transceivers, ground the receiver through the [GND] terminal on the rear panel.

For best results, connect a heavy gauge cable to a water pipe or long, earth-sunk copper rod. Make the distance between the [GND] terminal and ground as short as possible.

TYPE-N CONNECTOR INSTALLATION EXAMPLE

➀

Nut Rubber gasket

 

15 mm

 

Clamp

 

Washer

➁

3 mm 6 mm

 

Center conductor

(10 mm ≈3⁄8 in)

Slide the nut, washer, rubber gasket and clamp over the coaxial cable, then cut the end of the cable evenly.

Strip the cable and fold the braid back over the clamp.

➂

➃

Solder hole

No space

Plug body

Soft solder the center conductor. Install the center conductor pin and solder it.

Carefully slide the plug body into place aligning the center conductor pin on the cable. Tighten the nut onto the plug body.

• Be sure the center conductor is the same height as the plug body.

PL-259 CONNECTOR INSTALLATION EXAMPLE

➀

 

30 mm

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Coupling ring

10 mm (soft solder)

➁

10 mm Soft

 

 

 

 

 

 

 

solder

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1–2 mm

(10 mm ≈3⁄8 in)

Slide the coupling ring down. Strip the cable jacket and soft solder.

Strip the cable as shown at left. Soft solder the center con- ductor.

➂

➃

solder solder Slide the connector body on and solder it.

Screw the coupling ring onto the connector body.

9

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Contents IC-r8500 Accessories included with the IC-R8500 Qty Explicit DefinitionsTable of Contents ➋ SLEEP/SET Switch SLEEP/SET Panel DescriptionFront panel ➎ Headphone Jack Phones5SPEECH/LOCK Switch SPCH/LOCK 7MAIN Dial@0S-METER @7SCAN Switches Scan Scan SET Skip p Auto pPrio p DLY D/S pRear panel 7ATTENUATOR Indicators 9RECEIVE IndicatorFunction display MHz kHzMounting installation ConnectionsLocation Receiver standRequired connections Using a long wire antenna for HF bands TYPE-N Connector Installation ExamplePL-259 Connector Installation Example Antenna connection GroundingConnecting to a PC Tape recorder connectionsTransceive function Data demodulation terminalFrequency Setting Using the keypadExample Setting the Frequency Using the Keypad Read me firstUsing the main dial Selecting a tuning stepSetting the programmable tuning step Setting the lock function coverageInitial settings Mode selectionReceive Functions Center indicator Squelch functionFunctions for FM Functions for SSB/CWBFO adjustment Noise blankerAudio peak filter Dagc functionFor high speed data 9600 bps reception in FM mode Data communicationsConnections Receiving methodBank Initial Contents Usage Memory ChannelsGeneral Bank selectionUsing the M-CH selector Using the keypadChannel selection Bank limit functionProgramming Copy and paste memory editingClearing Channel/bank names Channel name programmingBank name programming Assigning channel numbers Deleting memory channelsTo rearrange bank channel assignments Adding/inserting memory channels ➂ Rotate M-CH to select the following➃ Push Bank for 1 sec. to perform the selected operation Scans OperationMemory scan Memory select scanDProgrammed scan Mode select function Specifying skip channel and frequencyPriority scan Specifying skip channelsAutomatic bank limit/skip functions Voice scan control functionTurning OFF the automatic function Scan speed/delay functions Programming scan edge frequenciesScan resume condition OFF DLY ∞Assigning a function to the DELAY/SPEED control Scan delayScan speed Sleep Timer OperationSET Mode Selecting quick set modeSelecting initial set mode Display Example Quick SET ModeQuick set mode items Initial set mode items When the optional UT-102 Voice Synthesizer Unit is Installed, you can select between EnglishInstalled, you can select between faster or slower This item sets the data transfer rate. When AutoConnector Information RS-232C socket Remote jackIf OUT jack AGC OUT jackDC 13.8 V and DC in sockets REC Remote jackREC OUT jack Phones jackControl Commands Command tableData format Basic format from PC to IC-R8500Memory channel contents set & write 1A ‘OK’ message from IC-R8500 to PC‘NG’ message from IC-R8500 to PC Special bank number and channels bnMaintenance Optional Installations ➂Replace the top coverCR-293HIGH Stability Crystal Unit Operation TV-R7100 specificationsGeneral TV receiverTroubleshooting Memory Channels Scan Problem Possible Cause Solution Specifications GeneralReceiver Options AH-7000FL-52ACW Narrow Filter 455 kHz 500Hz/-6 dB AD-55/A/V AC AdapterCount on us

IC-R8500 specifications

The Icom IC-R8500 is a highly regarded general-purpose receiver that has made its mark among amateur radio enthusiasts and professionals alike. This versatile communication receiver is known for its wide frequency coverage, advanced features, and robust design, making it a valuable tool for various applications, including shortwave listening, public safety communication, and aircraft monitoring.

One of the standout features of the IC-R8500 is its extensive frequency coverage. It spans a range from 0.1 MHz to 3 GHz, allowing users to access a wide spectrum of signals. The receiver includes coverage of HF, VHF, UHF, and even microwave bands, making it suitable for listening to everything from amateur radio transmissions to satellite communications.

The receiver employs a high-performance double-conversion superheterodyne architecture, which contributes to its excellent sensitivity and selectivity. The advanced RF circuitry minimizes interference and enhances the clarity of received signals. Users can expect outstanding audio quality and a wide dynamic range, even in challenging reception conditions.

Digital Signal Processing (DSP) is another key technology incorporated into the IC-R8500. The DSP capabilities allow users to apply noise reduction and filtering techniques to improve the quality of the received audio. Features such as automatic notch filtering and IF filtering help eliminate unwanted noise, enhancing the listening experience.

The IC-R8500 is equipped with a large, easy-to-read LCD display that provides information on frequency, mode, signal strength, and other essential parameters. The user-friendly interface simplifies operation, allowing quick access to various settings and functions. Additionally, the receiver supports various modulation modes, including AM, FM, SSB, and CW, catering to different listening preferences.

For those seeking enhanced connectivity, the IC-R8500 offers multiple options, including an audio output jack, and external speaker connections. It also has a built-in memory function, allowing users to store and recall favorite frequencies easily. The receiver can be controlled via a computer interface, offering versatility for advanced users and programmers.

In summary, the Icom IC-R8500 stands out for its wide frequency range, superior sensitivity, and advanced features powered by DSP technology. Its robust construction and user-friendly design make it a favorite among communications enthusiasts seeking a reliable and versatile receiver for various applications. Whether for hobbyist listening or professional use, the IC-R8500 remains a top choice in the world of radio receivers.
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