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Author Topic: Open Source Panadapters for Icom IC-7300 and IC-9700 radios  (Read 271 times)

SV1AYZ

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Open Source Panadapters for Icom IC-7300 and IC-9700 radios
« on: September 30, 2022, 04:48:45 PM »

Hi,

I am a user of both IC-7300 and IC-9700. While I was looking for panadapters for my radios, I came across a company that has released their open source pandapters for IC-7300 and IC-9700 radios. Now, I'm planning to build my own panadapters. Design documents can be downloaded with these links.

Is there anyone already build one?

https://github.com/radiospectral/ICOM-IC-7300-Panadapter
https://github.com/radiospectral/ICOM-IC-9700-Panadapter
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K4WH

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Re: Open Source Panadapters for Icom IC-7300 and IC-9700 radios
« Reply #1 on: September 30, 2022, 08:45:36 PM »


Ok.  If you like to build I guess its a nice idea.  But I’m wondering if it’s performance would be as good what is all ready out there ?  I will admit that it will probably cost more by the time you put it all together.  i used a SDRPlay receiver to do it with my Kenwood 590sg and my 7300.  Actually I found the 7300 panadapter to be pretty good on its own.  Even with my Kenwood 890S I just use the radios screen.  The only panadapter that I have seen that really truly useful are the Flex Radios.  Just my take on things.
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G8FXC

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Re: Open Source Panadapters for Icom IC-7300 and IC-9700 radios
« Reply #2 on: October 01, 2022, 08:35:04 AM »

That RadioSpectral design is not a Panadaptor, it's a device you can install into your 7300 to add an RF takeoff to drive an external SDR such as the RSP1A and add panadaptor functionality. When I had a 7300, I installed the RadioAnalogue board and it worked well.

The original design was produced and marketed by RadioAnalogue. They contracted some Turkish guys to work on the design and production - the relationship broke down and the Turks set up RadioSpectral to produce a cost reduced clone. There was a legal battle going on between the two companies over intellectual property rights - since I sold my 7300, I rather lost interest. RadioSpectral reduced the cost by removing components and then claimed that doing so improved performance.

The attraction of either board is that it fits into the 7300 case without any modifications. If you want to maintain that advantage, you'll have to be careful with the construction. You can get similar functionality with the MFJ switch (1708?) but that is an external box...

Martin (G8FXC)
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SV1AYZ

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Re: Open Source Panadapters for Icom IC-7300 and IC-9700 radios
« Reply #3 on: October 01, 2022, 11:22:23 AM »

Hi,

Thanks for your response.  Does Radioanalog also provides their schematic design?
I really wonder what their design differences are?

73!
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G8FXC

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Re: Open Source Panadapters for Icom IC-7300 and IC-9700 radios
« Reply #4 on: October 02, 2022, 08:32:00 AM »

Hi,

Thanks for your response.  Does Radioanalog also provides their schematic design?
I really wonder what their design differences are?

73!

RadioAnalogue don't publish their design, but RadioSpectral did describe the differences on their web site the last time I looked. I seem to remember that the most significant difference was the omission of a voltage regulator on the power rail. They claimed that this reduced the noise levels and that the regulator in the RadioAnalogue design was unnecessary because it was drawing power from a regulated source in the 7300.

Martin (G8FXC)
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