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- From: ker@cbnewsj.cb.att.com (kenneth.roser)
- Newsgroups: rec.radio.amateur.misc
- Subject: ICOM IC-2410 mods
- Message-ID: <1991Oct7.031023.4559@cbnewsj.cb.att.com>
- Date: 7 Oct 91 03:10:23 GMT
- Organization: AT&T Bell Laboratories
- Lines: 97
-
- In addition to a previous posting concerning changing the display I
- thought I would share info on:
-
- 1.) Extending the receive range
- 2.) Adding an 800 Mhz antenna input
- 3.) Cross-band repeat instructions (local and via remote control)
-
- EXPANSION OF RECEIVE RANGE
-
- The following diodes are located on the Logic Unit circuit board. The
- Logic Unit circuit board sits behind the front panel of the radio. To
- get to the board remove the top and bottom of the case. Now notice that
- the front section of the radio is a separate unit from the main body of
- the radio. Remove the 4 screws holding the sections together but do not
- yet separate the sections. Place the radio on a table so that it is
- right side up. Carefully start to separate the sections being careful
- of ribbon cables that connect the front section of the radio to the
- rear. If you look at the back of the circuit board on the front section
- towards the lower part of the radio, you will clearly see three glass
- diodes labeled D8, D9 and D10. You will know this is the right circuit
- board because a lithium battery will be taped to it. These are the
- diodes to cut to get extended receive range as follows:
-
- D8 320-399, 830-950 800 Mhz coverage requires new antenna input
- D9 118-135
- D10 400-479
-
- 800 MHZ ANTENNA INPUT
- To receive 800 Mhz you need to add a new antenna input to connector J2
- on the MAIN-B unit (UHF unit) which is the large circuit board on the
- bottom of the radio. J2 connects to a the B-band board which is a very
- small daughterboard, that is connected to the MAIN-B board. The service
- manual offers no description of this board but it apparently is the 800
- Mhz front end.
-
- Two parts are needed:
- One 5 3/4" grey coax jumper (this is available from ICOM but it doesn't
- have a part number)
-
- Either:
- One OPC223 pigtail with UHF connector
- or
- One OPC166 pigtail with N connector
-
- The grey coax jumper has a plug on one end that mates with J2 and bare
- leads on the other. The pigtail also has two bare leads on one end.
- This same end also has a metal flange thats designed to screw onto the
- back panel of the radio after removing one of the dummy caps on either
- side of the existing antenna pigtail.
-
- Without going into too much detail, you must:
-
- Remove the small metal cap nearest the bottom of the radio and next to
- the existing pigtail.
-
- Remove the metal shield at the back section of the Main-B unit.
-
- Solder the two pieces of coax together, shield to shield, center to center
- and screw this assembly on to the back panel.
-
- Plug the grey cable into J2 and then reassemble the radio.
-
-
- CROSS-BAND REPEAT (An edited version from an ICOM info sheet)
-
- 1.) Set frequencies for both UHF and VHF. If necessary, set transmit offset
- and tone.
-
- 2.) Hold the "BAND" switch and the "SET" switch. The memory number display
- will flash the letter "L". This indicates the 2410 is in the "Mini Repeater"
- mode.
-
- 3.) Transmission by PTT is possible. If PTT is operated, the band which
- is indicated by the flashing decimal point will be transmitted on. This
- can be done even when in "Mini Repeat" mode. In other words, PTT has
- priority over the "Mini Repeat" operation.
-
- Transmitted band will be switched by the "UP" or "DN" key on the microphone.
- The flashing decimal point will indicate which band will be transmitted on.
-
- 4.) Mini Repeater function will remain even when power is turned off.
- To disable repeater function, hold the "SET" key until the flashing "L"
- disappears.
-
- REMOTE CROSS-BAND ACTIVATION
- To activate cross-band repeat remotely: after dialing "B", optional 3 digit
- code then "#", the command for cross-band repeat on is "B", "D", "*".
-
- To turn off repeat, dial "B", optional 3 digit code, then "#".
-
-
- DISCLAIMER: Proceed at your own risk. I assume no responsibility if any
- info posted here causes your radio harm.
- --
- --------------------------------------------------------------------------------
- Ken Roser - WA2VCI - ker@mtgzfs3.att.com - AT&T Bell Laboratories - 908-957-5822
- --------------------------------------------------------------------------------
-
- =============================================================================
-
- IC-2410 Dual Band External & Mike Remote Codes
- ----------------------------------------------
-
- Call MR VFO CLR
- 1 2 3 A
-
- VHF UHF High Acs
- 4 5 6 B
-
- Vmoni Umoni Low Spch
- 7 8 9 C
-
- Dwn Mute Up Ent
- Please enter a blank line to continue, anything else to halt output
- * 0 # D
-
- Other Functions
- ---------------
-
- B# or B???# = External On (?=password) Further protection used Tone/Squelch
- B* = External Off
-
- DB* = CrossBand On
- DB# = CrossBand Off
-
- DC = Speech Transmit Freq.
-
- Notes
- -----
-
- - 4,5,7,8,0 Function not available via External Remote Control????
- - C Function not available when in CrossBand Mode????
- - Display debate, don't know why the original display was boycotted,
- but I seen both & had a choice. I preferred the original, lovingly refer to,
- as stealth. Think twice, before you get the other one.????
-
- - There are diodes to be installed for some features, like transmit in
- Please enter a blank line to continue, anything else to halt output
- rest of UHF ham band (420-450) and extended receive..etc. Check your
- local authorities, regarding scanning laws.
-
- Extended Coverage
- -----------------
-
- RX VHF Band:118-174 Mhz. RX UHF Band:400-479 + 830 - 950 Mhz.
- TX VHF Band:136-174 Mhz. TX UHF Band:400-479 Mhz.
-
- Tuning Steps
- ------------
-
- VHF Band: 118-174 Mhz. 5 Khz. 10 Khz. 12.5 Khz. 15 Khz. 20 Khz. 25 Khz.
- UHF Band: 400-479 Mhz. 5 Khz. 10 Khz. 12.5 Khz. 15 Khz. 20 Khz. 25 Khz.
- Cellular: 830-950 Mhz. 10 Khz. 12.5 Khz. 20 Khz. 25 Khz. 30 Khz.
-
- --------------------------------------------------------------------------
- Do you have any other codes, that I am not aware, please send me a message
- and the info to:
-
- 73's de Alex Seiko @:VE3MDY.#CON.ON.CAN.NA North Bay [44.135.108.1]
-
- Copied from the QRZ! Windows Ham Radio CDROM
-
-