开云体育

Japan version needing frequency expansion on 2m/440

Andrew K5KNM #42883 Hello all! I recently purchased the Japan version of the IC-7000 for use in my my shack while my other USA version one will stay as a mobile. Of course there are some difference in frequencies between this one and the USA version. Mainly the 2m/440 bands is where the most differences are . On this model, 2m is only 144 to 146 mhz and 70cm is 430 to 440 mhz. . It appears the typical MARS mod does not expand these 2 bands to get the full US frequencies. I would like to expand these 2 bands so I'm asking here if anyone knows if this possible and what would be the procedure be. Thanks! ? 73 Andrew K5KNM
J.D. Barron Member Profile All Messages By This Member #42885 Unfortunately almost all Japanese radios are set to conform to Japanese laws and are not modifiable to meet US US specifications.? The Japanese "FCC" does not allow the radios modification and these can not be changed without major changing boards or major components. This is why Icom will not work on a Japanese version of a radio nor warranty one here as parts may not be available and they were produced for that region. Best to not buy an out of region radio for use in the US. ?
Andrew K5KNM #42886 Thanks for your reply, Yeah I was afraid that would be the case.
James F. Boehner, MD All Messages By This Member #42887 开云体育 Andrew, ? I wish there was a universal way to communicate this to all: ? Domestic Japanese amateur radio units are blocked at the CPU level to only be able to transmit on Japanese amateur radio bands.? There is no way of opening the bands short of replacing the CPU. This is because of Japanese law. This is true for VHF and UHF.?? I understand that some have figured out how to open frequencies on HF, but this is unconfirmed. ? Export units have their own frequency bands depending on the country , but they can be modified for extended transmit.? That is, the EU radios have frequency restrictions somewhat similar to the domestic Japanese units, but the EU radios can be modified to operate frequencies that are available to us in Region 2 (i.e. extending 144-146 MHz to 144-148 MHz. ? My assumption on the Japanese newer units is that if new amateur radio frequencies are available in Japan, that ICOM could potentially add them by a firmware update, but this is only a guess. ? ‘73 de Jim N2ZZ ? toggle quoted message Show quoted text From: [email protected] <[email protected]> On Behalf Of Andrew K5KNM via groups.io Sent: Saturday, January 25, 2025 10:29 AM To: [email protected] Subject: [ic7000] Japan version needing frequency expansion on 2m/440 ? Hello all! I recently purchased the Japan version of the IC-7000 for use in my my shack while my other USA version one will stay as a mobile. Of course there are some difference in frequencies between this one and the USA version. Mainly the 2m/440 bands is where the most differences are . On this model, 2m is only 144 to 146 mhz and 70cm is 430 to 440 mhz. . It appears the typical MARS mod does not expand these 2 bands to get the full US frequencies. I would like to expand these 2 bands so I'm asking here if anyone knows if this possible and what would be the procedure be. Thanks! ? 73 Andrew K5KNM
ajparent1/kb1gmx All Messages By This Member #42888 See links.... ? /g/ic7000/message/42847 /g/ic7000/message/42796 -- Allison
Andrew K5KNM #42889 Thanks for some more responses, I should have looked into it more carefully before buying the Japan version. These radio's can sometimes be scarce to buy used when looking for one and at the time, all I can find was the Japan version. My guess was that all versions were essentially built the same with the same components and the MARS mod I found online would expand "all" the frequencies. I see now this is not the case.? It's still a good radio and covers enough 2m for me and has plenty of HF range that will suit me. ? Thanks again, Andrew K5KNM

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