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Friday, 6 May 2016

IC-7300 - the first Casualty?

Well,

You will remember last time that I came home with a new IC-7300. I've played with it quite a bit and it seemed to be an excellent radio with very good close in signal rejection on receive.

Yesterday I was using the radio on WSJT and noticed that even though the power output was set at 40% and the audio drive levels set such that the output power was 25W, when the radio entered TX the PO meter shot up to 100%, then almost immediately back to 0% and then crept up over 3-4 seconds to the 25% it should be at. This was looking like the worst ALC overshoot I had ever seen - I wondered if this was something to do with the new firmware upgrade.

Anyhow, a few minutes later the radio started to "re-boot" on entering TX. I checked all the obvious things like PSU voltage and SWR et cetera, then I simplified the setup.

I have a very simple PC based audio tone generator so I set that up to generate a 1200Hz tone on the USB audio device from the IC-7300, then when I put the radio into PTT using either a CAT command or the mic PTT the radio "re-boots".

Here's a video showing this:


So, the radio has gone back to Icom....

Here's Bonnie Dog and Miss Luna Cat who appear to be the very best of friends:


Local conditions.

10 comments:

  1. Very interesting story on the 7300 which is a complex machine with all that firmware doing a lot of things at once. Hopefully, your issue was hardware. Keep us posted. 73, Bernie

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  2. It's gone back to Icom so we will see....

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  3. Maybe the term "reboot" will be normal with new rafios. The flex and ele raft prople need software patches now and then

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  4. VE3VC has a 7300. I was very impressed with the touch screen and the easy to use menu system. This radio will cause a discontinuity in my view due to the price point.

    73, Bernie

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  5. Is the 7300 back from Icom?

    Bernie, VE3FWF

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  6. If I set to 62% will see 79watts out on rare occurrence on LP100A

    If I watch on RF Scope, I see an occasional overshoot over the nom
    setting at 50%, but need to see if this is really the case.

    I have reservations about on the internal meter on IC-7300

    A friend had his LDMOS Amp pre driver die while using his IC-7300,
    but not sure if it was due to the IC-7300, RF into ALC, needs more
    investigation.

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  7. Suggest you use FT-240-31 or Mix 31 Cores ( 5-6 turns) on all Cable Ports
    for the Re-Boot Issue.

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  8. Also, if DC plug/pins is not snug, a sudden voltage drop could causing a Re-Boot

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  9. I wonder how problem solved? The rebooting was a malfunction or due to excess rf? Please tell us 73

    ReplyDelete
    Replies
    1. Malfunction - replacement radio from Icom.

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