ICOM IC-705: A slightly different perspective

Discussion in 'Amateur Radio News' started by OH8STN, Sep 24, 2019.

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  1. VE3MAL

    VE3MAL Ham Member QRZ Page

    Reading over these comments, I'm surprised that an internal ATU is such a big deal. Besides the Elecraft, nearly every other radio's internal tuner takes the radio from tolerating about 2:1 to about 3:1. Not all that useful. For those situations where you have a non-resonant antenna, manual QRP tuners are cheap, tiny, consume zero power, and are capable of far, far more than any internal tuner. Take a look at the Emtech ZM2, the PA's Sota tuner, etc. If you need to push one button, Elecraft's T1 is an option too.
    What cannot be fixed with a little tiny box attached to the side would be current draw and heat dissipation. Here's hoping the rx current draw is considerably better than the 7300, and, that it can actually tx 10w all day on heavy duty-cycle digital modes without overheating. Not achieving one of those would pretty much be show-stoppers for portable digital operation on battery.
    K7GYB likes this.
  2. WA2LXB

    WA2LXB XML Subscriber QRZ Page

    7300 has an emergency mode for the ATU that allows a considerably greater mismatch than 3:1 at reduced power. See section 11 of the manual: http://www.icom.co.jp/world/support/download/manual/pdf/IC-7300_ENG_CD_1.pdf or https://www.remotetx.net/ic-7300-enable-emergency-tuner-mode/
  3. K7LZR

    K7LZR Ham Member QRZ Page

    I still maintain my original position from another post regarding this. Here it is:

    ".....Very good. Looks like a nice enough portable but I just don’t think that Icom, Kenwood, Yaesu or Elecraft get it when designing field gear. What we really need is a more rugged HF/VHF/UHF radio – and I mean military type ruggedness in a class such as that of the Harris Falcon III, Barrett, or Codan radios. And not so many big knobs sticking out – they tend to break easily. Also not so many jacks/wires poking out of the sides. Its too messy and won’t easily fit into a case with stuff plugged in. And a true field radio will have universal power input – it will operate from internal batteries, or accept an input from 10-30vdc, or 110/220vac. All in one box. With today’s power supply technology it can be done fairly easily and keep weight reasonable too. Lastly, dump the touch screens. While okay on your tablet or smart phone, they are a real pain and a big mistake magnet on a field radio. The US Navy just dumped all of its touch screen navigation controls on its destroyers in favor of proven mechanical systems for the same reason. Such a radio would likely cost about the same as a tricked out KX-3 but would be much more value for dollar.

    So the ham radio which still comes closer to these goals in this class is the good old Yaesu FT-817/818.....
    K7GYB likes this.
  4. W5UAA

    W5UAA Ham Member QRZ Page

    With reference to my original post, "It has DSTAR, therefore I'm not going to buy it.", I don't do Dstar because it's a digital voice mode. Along with Fusion and currently two flavors of DMR, I view all of them as currently harmful to amateur radio. (one answer to, "why are we having trouble getting new folks to get licences? and why do they get a license and then become silent?") Dstar, Fusion and DMR create cliques in my local area. Also, since Dstar and Fusion are proprietary, I see DMR as the winner in the long run since it's open source. When I see Dstar and Fusion fail, and everyone using some future, interoperable version of DMR, I might join the VHF/UHF digital voice revolution then. The logic behind my thinking is I'm not going to financially support a mode that currently divides hams and is doomed to eventually fail.

    Nothing crazy, just simple as that. Some of you may think that's crazy, but I don't think I'm alone.

    I've been a fan of Icom since my first IC-2AT back in the early 80's. I've owned just about all of their new (mid priced) HF/VHF radios up until recently. I just want to stick with analog for now. This new 705 looks like it's going to be a great QRP rig. But I draw the line at Dstar. That kills the deal for me.

    Peace out.
    WN1MB likes this.
  5. KC2SIZ

    KC2SIZ Ham Member QRZ Page

    Yeah, I'm not crazy about the form factor. Portable radios can come in for some rough treatment, and this radio doesn't look particularly tough. How's that video display going to hold up after this thing has rolled down a rocky hillside?
    K0PIR likes this.
  6. WB8LBZ

    WB8LBZ XML Subscriber QRZ Page

    At least one poster mentioned the lack of an antenna tuner. I have one built into my HF rig and my amp. They get little use as my antennas are resonate where I use them no need for a tuner. There was a mention by others about an external amp. There is an LDMOS amp kit made in Germany that will give legal limit output with 1 to 2 watts drive. There is a worry about that pretty delicate display and the dainty knobs, wrap it with bubble wrap and shove it into a protective case and operate it remotely via USB cable. I think you guys are worried about small stuff. This will be a block buster radio and all the nay-sayers will be on the outside looking in once it comes out.

    73, Larry WB8LBZ
    El Paso, TX
    N5EQY likes this.
  7. K6CLS

    K6CLS Ham Member QRZ Page

    you're at home... fine. when you go portable, you may not be able to carry and set up anything resonant... hence use of a tuner. Having to carry one more box just adds to the packing burden. Ask all the folks that moved from FT-817 to KX3 how's that internal tuner treating them.
    WW2PT likes this.
  8. K0NGO

    K0NGO XML Subscriber QRZ Page

    Great video!
    It sounds great, but what is with both ICOM and YAESU and their refusal to put WX station reception capability in their radios?
    That is my biggest complaint with my 817, and I was hoping that ICOM would see the light of having this important feature in (what I use it for) an emergency radio. :-(
  9. NX1Q

    NX1Q XML Subscriber QRZ Page

    I paid $495.00 for mine HRO Black Friday double mail in rebate extravaganza.
    K0GMK likes this.
  10. K7GYB

    K7GYB XML Subscriber QRZ Page

    So you dogmatically refuse to use an external tuner? I absolutely refuse to use internal tuners - they are deoptimized so they can fit into the radio and typically don't do a good a job as an external manual tuner. I like the feel of tuning up my own antennas on my 817ND and know without a doubt when it is flat... so it's not that great a feature as far as I'm concerned. The power draw is going to be an issue regardless of how "cool" the radio looks. Go ahead and carry your larger battery and the large solar panel (which by the way ARE accessories). Finally, no mention of how great that that touchscreen is going to work with wet, grimy fingers or in harsh environs. I go out in all types of weather when doing SOTA - being at the mercy of glitchy tech when you most need it is not something I can co-sign. I'm not a hater, just being "pragmatic".
    WN1MB and K0GMK like this.

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