The MARS/CAP frequencies are just slightly outside the ham bands. Maybe this will help people make educated decisions about these mods. While there may be MARS/CAP mods for the radio, it doesn't necessarily mean it's a good idea. 1 Since we seem to have several posts about doing 'MARS/CAP' mods to various pieces of amateur radio equipment, let's address the general usefulness of these mods by discussing what radios are acceptable to MARS and CAP. No point in damaging a $300+ radio to save the cost of buying a purpose built GMRS radio. I'd look at current consumption, as well as SWR. I get it, you don't want to buy a dedicated GMRS radio, and want it for "emergencies", but sometimes there's a reason why things happen like this. Or, could be the SWR is high enough that it's impacting the radio. Icom IC-9700 Users Ive been asked by several people for the CAP/MARS mod. Download also the complete MARS/CAP modification (Updated 6 july 2016) in PDF Search help: Support (FAQ) How to donate: Help mods.dk: About. Sometimes, the reason why radios have limits is because they won't work correctly outside the design specs. 0 116th Ave NE IC-7100 MARS/CAP Modification Remove the follo wing diodes to. When you take the radio that far outside its designed operating area, it can do funky things, like start sucking down more power than your wiring can support, the transmitter can get unstable and start throwing out spurious signals, etc. When aligning commercial radios, there's usually instructions to monitor current consumption as part of the transmitter alignment procedures. The radio was designed for amateur radio frequencies.
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