cra3y

ok, I will ask a person, who's modded my yaesu, what he did (he mentioned, that he also did something else that simply remove solder-jumper connection). THX for info!

1) because release AM TX capable radio (especially in airband) needed additional certification process? (and having this radio, with TX AM enabled on airband will require special license, which is not needed for radios, whos haven't enabled AM TX in airband - they behave like radio scanner in this band, not radio transmitter) 2) because "John Smith" should buy two complementary radios (one for airband, second for PMR/LPD) and he have to pay twice? (radio producer will do double deal with single person) 3) if something is for everything, there is for nothing? (because is not specialized, so is not fine tuned for specified usage?) during measure my vx-6r with TX AM on 110-130 MHz, the radio trasnmit best in 125-130 Mhz, 115-125 is acceptable, but 110-115 give poor quality + very loaded TX circuit (voltage drops rappidly and load amperage is very high). i don't want to say, that both yeasu are developed to support this trasmition, but instead they are capable to transmit in airband with acceptable quality for PPG purpose (slow speed aircraft, like PPG, did't required verly long TX range, my yeasu support about 1km at ground level to about 8-10km in air) PS: i'm still looking for good ham radio, that will work very well "from the box"(without mod) in airband and PMR/LPD freq.

because is locked via firmware/processor. it is like cars engines, the same engine - different output power, because of processor this is positive aspect of cutting costs. manufacturer doing near the same radios and locking features based on purpose of radio. yes, vx-6r and vx-7r has AM tranmitter and it could be used with mod and propelly tuned antenna (i have customized duobander tuned on 122 and 434 MHz) PS: i didn't want to fight with law/caa authorities in this forum. we (i and my ppg friend) have an agreement with local airport to permit to use airband for purpose which I described in previous post. of course i'm not able to use legally airband in different places without such agreement, but i mentioned that there is a bill i my country that should solve PPG and PPGG demanding to communitation with tower.

You are wrong, because both radios has FM/AM switch mode - when i switch to FM, the tower "see" busy channel without any sound (only carrier locked the channel). when i switch to AM, everything is ok. for example Vx-5r doesn't have AM transmitter. my radio was tested with wise persons who's working as radio operator in tower (in local airport) and we tested it with broadband spectrum analyzer (wavetek) and it didn't cause any disturbance over whole freq range. but You know better? PS: i doesn't want to encourage any person to mod his ham radio. i modified my vx-6r by with help by qualified personel (in term in radio/tech and operator radio operator to check if everything is ok) PS2: we used radio before take off and in final approaching - the purpose is to make tower know about our presence, not for bla bla talking about pizza PS3: in my country there is proposal in new bill to legalize some devices for PPG and PPGG to legalize way to use such (modded and tested by specialized personel) devices to comm with tower - now is like You described - if we doesn't make mess in airband, there will be ok, because knowledge about flying objects (reported by radio) is most important than rest aspects of using radio in airband.

both (vx-6r and vx-7r) with mod are able to transmit (TX) on airband (in AM mode). with my vx-6r i have to set TX freq. to 5kHz more that RX one (if RX is 122.700, then I set TX 122,705 for clear and loud transmit). also i bought dual-band antenna, especially for 122MHz and PMR usage (PMR for everyday use and pilot talk, 122 for comm to my local airport, when I will enter to CTR) -- best regards Chris