Modifications for the ICOM - RogerK

Quando si parla di destra e sinistra si intende guardare la radio con il frontale rivolto verso di noi.A questo punto le operazioni per la parte UHF sono finite, occorre recuperare la commutazione del PTT, che conviene prelevarladirettamente dal bocchettone del microfono, per fare cio' occorre smontare il frontale della radio sono solo quattro viti, e quindiarmarsi di buona pazienza per cercare il punto esatto della commutazione, in quanto abbastanza arduo saldare sul bocchettonestesso, io ho saldato un filetto volante (per ragioni di spazio) e sono quindi venuto al cavo pentapolare principale.Adesso siete pronti per lavorare a 9600 bauds.Un'ultima cosa non tenete molto lungo il cavo di uscita, consiglio di attenersi alle lunghezze di quelli delle antenne, e saldare altermine di questo un bocchettone DIN pentapolare oppure un DB9, si da collegarvi poi con facilit un cavo schermato che va alTNC.Ho notato che l'IC2400 funziona perfettamente senza nessun problemaSpero la modifica sia stata chiara ed esaustiva, attendo eventuali suggerimenti o richieste di chiarimento, non abbiate timore nelprocedere verso i 9600 bauds non sono poi quella brutta bestia che uno pensa tutt'altro!Buon Packet deIK7RVX .. Raff.This modification is read 725 times.top of page19-07-1998(IC-2410) Expansion of receive rangeThe following diodes are located on the Logic Unit circuit board. The Logic Unit circuit board sits behind the front panel of theradio. To get to the board remove the top and bottom of the case. Now notice that the front section of the radio is a separateunit 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 thatconnect the front section of the radio to the rear. If you look at the back of the circuit board on the front section towards thelower part of the radio, you will clearly see three glass diodes labeled D8, D9 and D10. You will know this is the right circuitboard 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 inputD9 118-135D10 400-479This modification is read 760 times.top of page19-07-1998(IC-2410) 800 MHz antenna inputTo 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 circuitboard on the bottom of the radio. J2 connects to a the B-band board which is a very small daughterboard, that is connected tothe 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 connectororOne OPC166 pigtail with N connectorThe 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 leadson one end. This same end also has a metal flange thats designed to screw onto the back panel of the radio after removing oneof 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.