Radioberry Preamp availability?

Phil Barker

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Nov 1, 2022, 1:38:46 PM11/1/22

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Hello Everyone.

Does anyone on this list have for sale either bare or fully populated Preamp boards?

If not, what outboard circuits are being used for T/R combined to an external RF amp.

73,

Phil KB6NZV

Peter Hiltz

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Nov 1, 2022, 2:09:22 PM11/1/22

to Phil Barker, Radioberry

Phil,

I hand wired a TR board that also brought out the paddle inputs. I had a number of RF relays in my junk box so that is not a problem; the RF relays are my TR switch and can be driven (very carefully) from the radioberry signal on the 20 pin connector.

A winter project is to re-do it on a PCB and I can make that available when done, but I will build it using the Teledyne relays I have on hand which are, unfortunately, expensive to buy. I got them from an estate.

Happy to consult and share as I do this. Probably the key issue if you build your own is that the PTT signal off the radioberry is 3.3V, and 10 mA, but you should double check that. My relays are 12 V so I used an FET to an opto-isolator chip to both keep the current on the pin both low and safe from damage. Once damaged, I believe you need a new radioberry.

Pete

WV3S

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Phil Barker

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Nov 1, 2022, 5:09:59 PM11/1/22

to Peter Hiltz, Radioberry

Thank you for the reply, Pete!

I'll follow your lead while I begin collecting the parts for the project.

73!,

Phil KB6NZV

Kristofer Danner

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Nov 1, 2022, 6:23:57 PM11/1/22

to Radioberry

If you want a bare preamp board, just upload the gerbers to JLCPCB and get 5 boards for $2.

Phil Barker

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Nov 1, 2022, 7:05:03 PM11/1/22

to Kristofer Danner, Radioberry

Hi Kristofer.

Thanks for mentioning that.

Which files are you referring to?

I don't know much about getting a fab to create boards based on files, so I'm asking for basic details on how that works.

73,

Phil KB6NZV

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Kristofer Danner

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Nov 1, 2022, 7:12:50 PM11/1/22

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Phil, get all the files from this directory on github: https://github.com/pa3gsb/Radioberry-2.x/tree/master/hardware/preamp/release/beta1/pcb

Place those files into a zip file.

The make yourself an account at whatever board manufacturer you want and upload the files. I have been using JLCPCB, they will do 5 of these for $2 plus the shipping.

KD

Phil Barker

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Nov 1, 2022, 7:20:56 PM11/1/22

to Kristofer Danner, Radioberry

Thanks Kristofer!

I'll give it a try and let you know the results.

To view this discussion on the web visit https://groups.google.com/d/msgid/radioberry/8780cf03-9cfa-430a-983e-8d1d895f6bf4n%40googlegroups.com.

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